Add supplements, kettlebell, calendar, push notifications, and PWA support

- Supplement tracking: CRUD endpoints, /today, /logs, Supplements page
- Kettlebell workouts: session tracking, analytics endpoint, ActiveSession page
- Calendar module: events CRUD, calendar components
- Push notifications: VAPID keys, PushSubscription model, APScheduler reminders,
  service worker with push/notificationclick handlers, Profile notifications UI
- PWA: vite-plugin-pwa, manifest, icons, service worker generation
- Frontend: TypeScript types, API modules, ConfirmModal, toast notifications
- Auth fixes: password hashing, nutrition endpoint auth
- CLAUDE.md: project documentation and development guide

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

CLAUDE.md

@@ -0,0 +1,88 @@
+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Development Commands
+
+### Start Everything
+```bash
+./develop.sh   # starts PostgreSQL (Docker), backend (uvicorn), and frontend (vite) together
+```
+
+### Backend
+```bash
+cd backend
+source .venv/bin/activate
+uvicorn app.main:app --reload --host 0.0.0.0 --port 8000
+ruff check .          # lint
+ruff format .         # format
+pytest                # run tests
+```
+
+### Frontend
+```bash
+cd frontend
+npm run dev           # dev server on :5173
+npm run build         # production build
+npm run lint          # ESLint
+```
+
+### Database
+```bash
+docker compose up -d  # start PostgreSQL with pgvector on :5432
+```
+
+## Architecture
+
+Full-stack health/fitness tracker with AI-powered nutrition analysis and plan generation.
+
+**Stack:** FastAPI (Python) + React 19 (TypeScript) + PostgreSQL/pgvector + DSPy + OpenAI GPT-4o
+
+### Backend (`/backend`)
+- `app/main.py` — FastAPI app, CORS config, router mounting
+- `app/api/v1/endpoints/` — Route handlers: `login`, `users`, `nutrition`, `health`, `plans`
+- `app/models/` — SQLModel ORM models (User, HealthMetric, HealthGoal, FoodLog, FoodItem, Plan)
+- `app/ai/` — DSPy modules: `nutrition.py` (food analysis + image analysis), `plans.py` (personalized plan generation)
+- `app/core/ai_config.py` — DSPy LM configuration (GPT-4o mini)
+- `app/api/deps.py` — FastAPI dependencies for auth and DB session injection
+
+### Frontend (`/src`)
+- `App.tsx` — React Router routes; all routes except `/login` are wrapped in `ProtectedRoute`
+- `api/client.ts` — Axios instance with base URL from `VITE_API_URL`; Bearer token auto-attached via interceptor from localStorage
+- `context/AuthContext.tsx` — Auth state (token, user); token persisted to localStorage
+- `pages/` — One page component per route (Dashboard, Nutrition, Health, Plans, Profile)
+- `components/catalyst/` — Reusable UI component library (buttons, inputs, tables, dialogs, etc.)
+
+### Auth Flow
+OAuth2 password flow → JWT (HS256, 8-day expiry) → stored in localStorage → Axios interceptor injects header on every request.
+
+### AI Modules (DSPy)
+Both AI modules use chain-of-thought (`dspy.ChainOfThought`) via GPT-4o mini:
+- **Nutrition:** Analyzes food text/images → macro breakdown accounting for hidden calories (oils, sauces)
+- **Plans:** Generates personalized diet + exercise plans from user profile data
+
+### Environment Variables
+See `.env.example`. Required: `DATABASE_URL`, `OPENAI_API_KEY`, `SECRET_KEY`, `POSTGRES_*` vars. Frontend uses `VITE_API_URL` (defaults to `http://localhost:8000/api/v1`).
+
+## Push Notifications
+
+### Testing push notifications
+**Always use the production build** — never test push notifications against `npm run dev`. The dev server's hot-reloading reinstalls the service worker on every reload, which invalidates push subscriptions (FCM returns 410 Gone).
+
+```bash
+cd frontend
+npm run build
+npx serve dist -p 5173 -s   # -s = SPA mode (falls back to index.html)
+```
+
+Then in the browser:
+1. DevTools → Application → Service Workers → Unregister any old SW
+2. Hard-refresh (`Cmd+Shift+R`) to install the fresh `sw.js`
+3. Profile → Notifications → toggle ON to create a fresh subscription
+4. Use "Send test" button or trigger via backend
+
+### If push notifications stop working
+- Check `chrome://gcm-internals/` — Connection State must be **CONNECTED** (not CONNECTING)
+- If disconnected, fully quit and restart Chrome (`Cmd+Q`)
+- Clear stale DB subscriptions: `docker compose exec db psql -U user -d healthyfit -c "DELETE FROM pushsubscription;"`
+- Re-subscribe after restarting

backend/app/ai/kettlebell.py

@@ -0,0 +1,57 @@
+import dspy
+from pydantic import BaseModel, Field
+
+
+class ExerciseBlock(BaseModel):
+    order: int = Field(description="Position in workout sequence")
+    name: str = Field(description="Exercise name")
+    description: str = Field(description="Brief description of the movement")
+    sets: int = Field(description="Number of sets")
+    reps: int = Field(description="Number of reps per set (0 if timed)")
+    duration_seconds: int = Field(description="Duration in seconds per set (0 if rep-based)")
+    weight_kg: float = Field(description="Prescribed weight in kg")
+    rest_seconds: int = Field(description="Rest time between sets in seconds")
+    coaching_tip: str = Field(description="Key coaching cue for this exercise")
+
+
+class KettlebellSessionOutput(BaseModel):
+    reasoning: str = Field(description="Step-by-step reasoning for session design choices")
+    title: str = Field(description="Session title")
+    focus: str = Field(description="Session focus e.g. strength, conditioning, mobility")
+    total_duration_min: int = Field(description="Estimated total workout duration in minutes")
+    difficulty: str = Field(description="Difficulty level: beginner, intermediate, advanced")
+    exercises: list[ExerciseBlock] = Field(description="Ordered list of exercises in the session")
+    notes: str = Field(description="Coaching notes and any special instructions for the session")
+
+
+class GenerateKettlebellSession(dspy.Signature):
+    """Generate a personalized kettlebell workout session based on user profile and preferences.
+
+    Think step-by-step: assess user fitness level, pick movements appropriate to the focus and
+    difficulty, assign weights respecting progressive overload principles from available weights,
+    sequence exercises for proper warm-up and fatigue management, and ensure total work time
+    (sets × reps/duration + rest periods) fits within the requested duration.
+    """
+
+    user_profile: str = dspy.InputField(desc="User details including age, weight, fitness level, and goals")
+    available_weights_kg: str = dspy.InputField(desc="Comma-separated list of available kettlebell weights in kg")
+    focus: str = dspy.InputField(desc="Session focus: strength, conditioning, mobility, fat loss, etc.")
+    duration_minutes: int = dspy.InputField(desc="Target session duration in minutes")
+    session: KettlebellSessionOutput = dspy.OutputField(desc="Complete structured kettlebell session")
+
+
+class KettlebellModule(dspy.Module):
+    def __init__(self):
+        super().__init__()
+        self.generate = dspy.ChainOfThought(GenerateKettlebellSession)
+
+    def forward(self, user_profile: str, available_weights_kg: str, focus: str, duration_minutes: int):
+        return self.generate(
+            user_profile=user_profile,
+            available_weights_kg=available_weights_kg,
+            focus=focus,
+            duration_minutes=duration_minutes,
+        )
+
+
+kettlebell_module = KettlebellModule()

backend/app/api/v1/api.py

@@ -1,6 +1,6 @@
 from fastapi import APIRouter
 
-from app.api.v1.endpoints import health, login, nutrition, plans, users
+from app.api.v1.endpoints import calendar, health, kettlebell, login, nutrition, plans, push, supplements, users
 
 api_router = APIRouter()
 api_router.include_router(login.router, tags=["login"])
@@ -8,3 +8,7 @@ api_router.include_router(users.router, prefix="/users", tags=["users"])
 api_router.include_router(nutrition.router, prefix="/nutrition", tags=["nutrition"])
 api_router.include_router(health.router, prefix="/health", tags=["health"])
 api_router.include_router(plans.router, prefix="/plans", tags=["plans"])
+api_router.include_router(kettlebell.router, prefix="/kettlebell", tags=["kettlebell"])
+api_router.include_router(supplements.router, prefix="/supplements", tags=["supplements"])
+api_router.include_router(calendar.router, prefix="/calendar", tags=["calendar"])
+api_router.include_router(push.router, prefix="/push", tags=["push"])

backend/app/api/v1/endpoints/calendar.py

@@ -0,0 +1,462 @@
+from calendar import monthrange
+from datetime import date, datetime
+from typing import Any, List, Optional
+
+from fastapi import APIRouter, Depends, HTTPException, Query
+from pydantic import BaseModel
+from sqlmodel import Session, select
+
+from app.api import deps
+from app.models.calendar import CalendarEvent, DailyNote
+from app.models.kettlebell import KettlebellSession
+from app.models.supplement import Supplement, SupplementLog
+
+router = APIRouter()
+
+
+# ── Pydantic schemas ─────────────────────────────────────────────────────────
+
+
+class DayMeta(BaseModel):
+    date: str
+    has_note: bool
+    event_count: int
+    supplement_compliance: Optional[float]
+    has_workout: bool
+    calorie_total: Optional[float]
+
+
+class DailyNoteUpsert(BaseModel):
+    content: str = ""
+    mood: Optional[str] = None
+    energy_level: Optional[int] = None
+
+
+class DailyNoteOut(BaseModel):
+    id: Optional[int]
+    date: str
+    content: str
+    mood: Optional[str]
+    energy_level: Optional[int]
+    updated_at: Optional[str]
+
+
+class CalendarEventCreate(BaseModel):
+    date: str  # YYYY-MM-DD
+    title: str
+    description: Optional[str] = None
+    event_type: str = "general"
+    color: Optional[str] = None
+    start_time: Optional[str] = None
+    is_completed: bool = False
+
+
+class CalendarEventUpdate(BaseModel):
+    title: Optional[str] = None
+    description: Optional[str] = None
+    event_type: Optional[str] = None
+    color: Optional[str] = None
+    start_time: Optional[str] = None
+    is_completed: Optional[bool] = None
+
+
+class CalendarEventOut(BaseModel):
+    id: int
+    date: str
+    title: str
+    description: Optional[str]
+    event_type: str
+    color: Optional[str]
+    start_time: Optional[str]
+    is_completed: bool
+    created_at: Optional[str]
+
+
+class SupplementWithStatus(BaseModel):
+    id: int
+    name: str
+    dosage: float
+    unit: str
+    frequency: str
+    scheduled_times: List[str]
+    notes: Optional[str]
+    is_active: bool
+    created_at: str
+    taken_today: bool
+    streak: int
+
+
+class KettlebellSessionSummary(BaseModel):
+    id: int
+    title: str
+    focus: str
+    total_duration_min: int
+    difficulty: str
+    status: str
+    completed_at: Optional[str]
+
+
+class DayDetail(BaseModel):
+    date: str
+    note: Optional[DailyNoteOut]
+    events: List[CalendarEventOut]
+    supplements: List[SupplementWithStatus]
+    kettlebell_sessions: List[KettlebellSessionSummary]
+
+
+# ── Helpers ───────────────────────────────────────────────────────────────────
+
+
+def _day_window(d: date):
+    """Return (start_dt, end_dt) for a full day."""
+    start = datetime(d.year, d.month, d.day, 0, 0, 0)
+    end = datetime(d.year, d.month, d.day, 23, 59, 59)
+    return start, end
+
+
+def _note_out(note: DailyNote) -> DailyNoteOut:
+    return DailyNoteOut(
+        id=note.id,
+        date=note.date.isoformat(),
+        content=note.content,
+        mood=note.mood,
+        energy_level=note.energy_level,
+        updated_at=note.updated_at.isoformat() if note.updated_at else None,
+    )
+
+
+def _event_out(ev: CalendarEvent) -> CalendarEventOut:
+    return CalendarEventOut(
+        id=ev.id,
+        date=ev.date.isoformat(),
+        title=ev.title,
+        description=ev.description,
+        event_type=ev.event_type,
+        color=ev.color,
+        start_time=ev.start_time,
+        is_completed=ev.is_completed,
+        created_at=ev.created_at.isoformat() if ev.created_at else None,
+    )
+
+
+# ── Endpoints ─────────────────────────────────────────────────────────────────
+
+
+@router.get("/month", response_model=List[DayMeta])
+def get_month_summary(
+    current_user: deps.CurrentUser,
+    session: Session = Depends(deps.get_session),
+    year: int = Query(...),
+    month: int = Query(...),
+) -> Any:
+    _, last_day = monthrange(year, month)
+    month_start = date(year, month, 1)
+    month_end = date(year, month, last_day)
+    month_start_dt = datetime(year, month, 1, 0, 0, 0)
+    month_end_dt = datetime(year, month, last_day, 23, 59, 59)
+
+    uid = current_user.id
+
+    # DailyNotes
+    notes = session.exec(
+        select(DailyNote)
+        .where(DailyNote.user_id == uid)
+        .where(DailyNote.date >= month_start)
+        .where(DailyNote.date <= month_end)
+    ).all()
+    notes_by_date = {n.date: n for n in notes}
+
+    # CalendarEvents
+    events = session.exec(
+        select(CalendarEvent)
+        .where(CalendarEvent.user_id == uid)
+        .where(CalendarEvent.date >= month_start)
+        .where(CalendarEvent.date <= month_end)
+    ).all()
+    event_counts: dict[date, int] = {}
+    for ev in events:
+        event_counts[ev.date] = event_counts.get(ev.date, 0) + 1
+
+    # SupplementLogs
+    active_supp_count = session.exec(
+        select(Supplement).where(Supplement.user_id == uid).where(Supplement.is_active)
+    ).all()
+    total_supplements = len(active_supp_count)
+    supp_logs = session.exec(
+        select(SupplementLog)
+        .where(SupplementLog.user_id == uid)
+        .where(SupplementLog.taken_at >= month_start_dt)
+        .where(SupplementLog.taken_at <= month_end_dt)
+    ).all()
+    supp_by_date: dict[date, set] = {}
+    for log in supp_logs:
+        d = log.taken_at.date()
+        supp_by_date.setdefault(d, set()).add(log.supplement_id)
+
+    # KettlebellSessions
+    kb_sessions = session.exec(
+        select(KettlebellSession)
+        .where(KettlebellSession.user_id == uid)
+        .where(KettlebellSession.status == "completed")
+        .where(KettlebellSession.completed_at >= month_start_dt)
+        .where(KettlebellSession.completed_at <= month_end_dt)
+    ).all()
+    workout_dates: set[date] = set()
+    for kb in kb_sessions:
+        if kb.completed_at:
+            workout_dates.add(kb.completed_at.date())
+
+    # FoodLogs — import lazily to avoid circular imports
+    from app.models.food import FoodLog  # noqa: PLC0415
+
+    food_logs = session.exec(
+        select(FoodLog)
+        .where(FoodLog.user_id == uid)
+        .where(FoodLog.timestamp >= month_start_dt)
+        .where(FoodLog.timestamp <= month_end_dt)
+    ).all()
+    calories_by_date: dict[date, float] = {}
+    for fl in food_logs:
+        d = fl.timestamp.date()
+        calories_by_date[d] = calories_by_date.get(d, 0.0) + (fl.calories or 0.0)
+
+    result = []
+    for day_num in range(1, last_day + 1):
+        d = date(year, month, day_num)
+        taken = len(supp_by_date.get(d, set()))
+        compliance = (taken / total_supplements) if total_supplements > 0 else None
+        result.append(
+            DayMeta(
+                date=d.isoformat(),
+                has_note=bool(notes_by_date.get(d) and notes_by_date[d].content),
+                event_count=event_counts.get(d, 0),
+                supplement_compliance=compliance,
+                has_workout=d in workout_dates,
+                calorie_total=calories_by_date.get(d) or None,
+            )
+        )
+    return result
+
+
+@router.get("/day", response_model=DayDetail)
+def get_day_detail(
+    current_user: deps.CurrentUser,
+    session: Session = Depends(deps.get_session),
+    date_str: str = Query(..., alias="date"),
+) -> Any:
+    try:
+        d = date.fromisoformat(date_str)
+    except ValueError:
+        raise HTTPException(status_code=400, detail="Invalid date format. Use YYYY-MM-DD.")
+
+    uid = current_user.id
+    start, end = _day_window(d)
+
+    note = session.exec(select(DailyNote).where(DailyNote.user_id == uid).where(DailyNote.date == d)).first()
+
+    events = session.exec(
+        select(CalendarEvent)
+        .where(CalendarEvent.user_id == uid)
+        .where(CalendarEvent.date == d)
+        .order_by(CalendarEvent.start_time)
+    ).all()
+
+    # Supplements with taken status for this date
+    active_supps = session.exec(
+        select(Supplement).where(Supplement.user_id == uid).where(Supplement.is_active).order_by(Supplement.name)
+    ).all()
+    day_logs = session.exec(
+        select(SupplementLog)
+        .where(SupplementLog.user_id == uid)
+        .where(SupplementLog.taken_at >= start)
+        .where(SupplementLog.taken_at <= end)
+    ).all()
+    taken_ids = {log.supplement_id for log in day_logs}
+    supplements = [
+        SupplementWithStatus(
+            id=s.id,
+            name=s.name,
+            dosage=s.dosage,
+            unit=s.unit,
+            frequency=s.frequency,
+            scheduled_times=s.scheduled_times or [],
+            notes=s.notes,
+            is_active=s.is_active,
+            created_at=s.created_at.isoformat(),
+            taken_today=s.id in taken_ids,
+            streak=0,
+        )
+        for s in active_supps
+    ]
+
+    kb_sessions = session.exec(
+        select(KettlebellSession)
+        .where(KettlebellSession.user_id == uid)
+        .where(KettlebellSession.created_at >= start)
+        .where(KettlebellSession.created_at <= end)
+    ).all()
+    kb_out = [
+        KettlebellSessionSummary(
+            id=kb.id,
+            title=kb.title,
+            focus=kb.focus,
+            total_duration_min=kb.total_duration_min,
+            difficulty=kb.difficulty,
+            status=kb.status,
+            completed_at=kb.completed_at.isoformat() if kb.completed_at else None,
+        )
+        for kb in kb_sessions
+    ]
+
+    return DayDetail(
+        date=d.isoformat(),
+        note=_note_out(note) if note else None,
+        events=[_event_out(ev) for ev in events],
+        supplements=supplements,
+        kettlebell_sessions=kb_out,
+    )
+
+
+@router.get("/notes/{date_str}", response_model=DailyNoteOut)
+def get_note(
+    date_str: str,
+    current_user: deps.CurrentUser,
+    session: Session = Depends(deps.get_session),
+) -> Any:
+    try:
+        d = date.fromisoformat(date_str)
+    except ValueError:
+        raise HTTPException(status_code=400, detail="Invalid date format.")
+
+    note = session.exec(
+        select(DailyNote).where(DailyNote.user_id == current_user.id).where(DailyNote.date == d)
+    ).first()
+    if not note:
+        raise HTTPException(status_code=404, detail="Note not found")
+    return _note_out(note)
+
+
+@router.put("/notes/{date_str}", response_model=DailyNoteOut)
+def upsert_note(
+    date_str: str,
+    data: DailyNoteUpsert,
+    current_user: deps.CurrentUser,
+    session: Session = Depends(deps.get_session),
+) -> Any:
+    try:
+        d = date.fromisoformat(date_str)
+    except ValueError:
+        raise HTTPException(status_code=400, detail="Invalid date format.")
+
+    note = session.exec(
+        select(DailyNote).where(DailyNote.user_id == current_user.id).where(DailyNote.date == d)
+    ).first()
+
+    if note:
+        note.content = data.content
+        if data.mood is not None:
+            note.mood = data.mood
+        if data.energy_level is not None:
+            note.energy_level = data.energy_level
+        note.updated_at = datetime.utcnow()
+    else:
+        note = DailyNote(
+            user_id=current_user.id,
+            date=d,
+            content=data.content,
+            mood=data.mood,
+            energy_level=data.energy_level,
+            updated_at=datetime.utcnow(),
+        )
+
+    session.add(note)
+    session.commit()
+    session.refresh(note)
+    return _note_out(note)
+
+
+@router.get("/events", response_model=List[CalendarEventOut])
+def list_events(
+    current_user: deps.CurrentUser,
+    session: Session = Depends(deps.get_session),
+    start: str = Query(...),
+    end: str = Query(...),
+) -> Any:
+    try:
+        start_date = date.fromisoformat(start)
+        end_date = date.fromisoformat(end)
+    except ValueError:
+        raise HTTPException(status_code=400, detail="Invalid date format.")
+
+    events = session.exec(
+        select(CalendarEvent)
+        .where(CalendarEvent.user_id == current_user.id)
+        .where(CalendarEvent.date >= start_date)
+        .where(CalendarEvent.date <= end_date)
+        .order_by(CalendarEvent.date, CalendarEvent.start_time)
+    ).all()
+    return [_event_out(ev) for ev in events]
+
+
+@router.post("/events", response_model=CalendarEventOut, status_code=201)
+def create_event(
+    data: CalendarEventCreate,
+    current_user: deps.CurrentUser,
+    session: Session = Depends(deps.get_session),
+) -> Any:
+    try:
+        d = date.fromisoformat(data.date)
+    except ValueError:
+        raise HTTPException(status_code=400, detail="Invalid date format.")
+
+    ev = CalendarEvent(
+        user_id=current_user.id,
+        date=d,
+        title=data.title,
+        description=data.description,
+        event_type=data.event_type,
+        color=data.color,
+        start_time=data.start_time,
+        is_completed=data.is_completed,
+    )
+    session.add(ev)
+    session.commit()
+    session.refresh(ev)
+    return _event_out(ev)
+
+
+@router.put("/events/{event_id}", response_model=CalendarEventOut)
+def update_event(
+    event_id: int,
+    data: CalendarEventUpdate,
+    current_user: deps.CurrentUser,
+    session: Session = Depends(deps.get_session),
+) -> Any:
+    ev = session.get(CalendarEvent, event_id)
+    if not ev:
+        raise HTTPException(status_code=404, detail="Event not found")
+    if ev.user_id != current_user.id:
+        raise HTTPException(status_code=403, detail="Not authorized")
+
+    update_data = data.model_dump(exclude_unset=True)
+    for key, value in update_data.items():
+        setattr(ev, key, value)
+    session.add(ev)
+    session.commit()
+    session.refresh(ev)
+    return _event_out(ev)
+
+
+@router.delete("/events/{event_id}", status_code=204)
+def delete_event(
+    event_id: int,
+    current_user: deps.CurrentUser,
+    session: Session = Depends(deps.get_session),
+) -> None:
+    ev = session.get(CalendarEvent, event_id)
+    if not ev:
+        raise HTTPException(status_code=404, detail="Event not found")
+    if ev.user_id != current_user.id:
+        raise HTTPException(status_code=403, detail="Not authorized")
+    session.delete(ev)
+    session.commit()

backend/app/api/v1/endpoints/kettlebell.py

@@ -0,0 +1,404 @@
+from collections import defaultdict
+from datetime import datetime, timedelta
+from typing import Any, Dict, List, Optional
+
+from fastapi import APIRouter, Depends, HTTPException
+from pydantic import BaseModel
+from sqlmodel import Session, select
+
+from app.ai.kettlebell import kettlebell_module
+from app.api import deps
+from app.models.kettlebell import KettlebellSession, KettlebellSetLog
+
+router = APIRouter()
+
+
+class KettlebellGenerateRequest(BaseModel):
+    focus: str
+    duration_minutes: int
+    available_weights: list[float]
+
+
+class LogSetRequest(BaseModel):
+    exercise_order: int
+    set_number: int
+    actual_reps: int
+    actual_weight_kg: float
+    actual_duration_seconds: int
+    perceived_effort: int
+
+
+class CompleteSessionRequest(BaseModel):
+    notes: Optional[str] = None
+
+
+class ExerciseProgression(BaseModel):
+    date: str
+    max_weight: float
+    avg_rpe: float
+    total_volume: float
+
+
+class PersonalRecord(BaseModel):
+    exercise_name: str
+    max_weight: float
+    date: str
+
+
+class WeeklyVolume(BaseModel):
+    week: str
+    sessions: int
+    total_volume: float
+
+
+class AnalyticsResponse(BaseModel):
+    weekly_sessions: List[WeeklyVolume]
+    exercise_progressions: Dict[str, List[ExerciseProgression]]
+    personal_records: List[PersonalRecord]
+    avg_rpe_trend: List[Dict]
+
+
+@router.get("/analytics", response_model=AnalyticsResponse)
+def get_analytics(
+    current_user: deps.CurrentUser,
+    session: Session = Depends(deps.get_session),
+) -> Any:
+    """Get aggregated analytics across all completed sessions."""
+    completed_sessions = session.exec(
+        select(KettlebellSession)
+        .where(KettlebellSession.user_id == current_user.id)
+        .where(KettlebellSession.status == "completed")
+        .order_by(KettlebellSession.completed_at)
+    ).all()
+
+    if not completed_sessions:
+        return AnalyticsResponse(
+            weekly_sessions=[],
+            exercise_progressions={},
+            personal_records=[],
+            avg_rpe_trend=[],
+        )
+
+    session_ids = [s.id for s in completed_sessions]
+    all_sets = session.exec(select(KettlebellSetLog).where(KettlebellSetLog.session_id.in_(session_ids))).all()
+
+    # Map session_id -> session
+    session_map = {s.id: s for s in completed_sessions}
+    # Map session_id -> exercise_order -> exercise_name
+    exercise_name_map: Dict[int, Dict[int, str]] = {}
+    for s in completed_sessions:
+        exercises = s.exercises.get("exercises", []) if s.exercises else []
+        exercise_name_map[s.id] = {ex["order"]: ex["name"] for ex in exercises if "order" in ex and "name" in ex}
+
+    # Weekly sessions + volume
+    weeks: Dict[str, Dict] = defaultdict(lambda: {"sessions": set(), "volume": 0.0})
+    for set_log in all_sets:
+        s = session_map.get(set_log.session_id)
+        if not s or not s.completed_at:
+            continue
+        week_start = s.completed_at - timedelta(days=s.completed_at.weekday())
+        week_key = week_start.strftime("%Y-%m-%d")
+        weeks[week_key]["sessions"].add(set_log.session_id)
+        volume = set_log.actual_reps * set_log.actual_weight_kg
+        weeks[week_key]["volume"] += volume
+
+    weekly_sessions = [
+        WeeklyVolume(week=k, sessions=len(v["sessions"]), total_volume=round(v["volume"], 1))
+        for k, v in sorted(weeks.items())
+    ]
+
+    # Exercise progressions + PRs
+    exercise_data: Dict[str, List[Dict]] = defaultdict(list)
+    for set_log in all_sets:
+        s = session_map.get(set_log.session_id)
+        if not s or not s.completed_at:
+            continue
+        ex_name = exercise_name_map.get(set_log.session_id, {}).get(set_log.exercise_order)
+        if not ex_name:
+            continue
+        exercise_data[ex_name].append(
+            {
+                "date": s.completed_at.strftime("%Y-%m-%d"),
+                "weight": set_log.actual_weight_kg,
+                "rpe": set_log.perceived_effort,
+                "volume": set_log.actual_reps * set_log.actual_weight_kg,
+            }
+        )
+
+    exercise_progressions: Dict[str, List[ExerciseProgression]] = {}
+    personal_records: List[PersonalRecord] = []
+
+    for ex_name, sets in exercise_data.items():
+        by_date: Dict[str, Dict] = defaultdict(lambda: {"weights": [], "rpes": [], "volume": 0.0})
+        for s in sets:
+            by_date[s["date"]]["weights"].append(s["weight"])
+            by_date[s["date"]]["rpes"].append(s["rpe"])
+            by_date[s["date"]]["volume"] += s["volume"]
+
+        progressions = [
+            ExerciseProgression(
+                date=d,
+                max_weight=max(v["weights"]),
+                avg_rpe=round(sum(v["rpes"]) / len(v["rpes"]), 1),
+                total_volume=round(v["volume"], 1),
+            )
+            for d, v in sorted(by_date.items())
+        ]
+        exercise_progressions[ex_name] = progressions
+
+        all_weights = [s["weight"] for s in sets]
+        max_w = max(all_weights)
+        pr_date = next(s["date"] for s in sorted(sets, key=lambda x: x["date"]) if s["weight"] == max_w)
+        personal_records.append(PersonalRecord(exercise_name=ex_name, max_weight=max_w, date=pr_date))
+
+    personal_records.sort(key=lambda x: x.max_weight, reverse=True)
+
+    # Avg RPE trend by session
+    avg_rpe_trend = []
+    sets_by_session: Dict[int, List] = defaultdict(list)
+    for set_log in all_sets:
+        sets_by_session[set_log.session_id].append(set_log.perceived_effort)
+
+    for s in completed_sessions:
+        rpes = sets_by_session.get(s.id, [])
+        if rpes and s.completed_at:
+            avg_rpe_trend.append(
+                {
+                    "date": s.completed_at.strftime("%Y-%m-%d"),
+                    "avg_rpe": round(sum(rpes) / len(rpes), 1),
+                    "session_title": s.title,
+                }
+            )
+
+    return AnalyticsResponse(
+        weekly_sessions=weekly_sessions,
+        exercise_progressions=exercise_progressions,
+        personal_records=personal_records,
+        avg_rpe_trend=avg_rpe_trend,
+    )
+
+
+@router.post("/generate", response_model=KettlebellSession)
+def generate_session(
+    *,
+    current_user: deps.CurrentUser,
+    request: KettlebellGenerateRequest,
+    session: Session = Depends(deps.get_session),
+) -> Any:
+    """Generate a new kettlebell session using AI."""
+    try:
+        user_profile = (
+            f"Age: {current_user.age or 'unknown'}, "
+            f"Gender: {current_user.gender or 'unknown'}, "
+            f"Weight: {current_user.weight or 'unknown'} kg, "
+            f"Height: {current_user.height or 'unknown'} cm"
+        )
+        available_weights_kg = ", ".join(str(w) for w in sorted(request.available_weights))
+
+        generated = kettlebell_module(
+            user_profile=user_profile,
+            available_weights_kg=available_weights_kg,
+            focus=request.focus,
+            duration_minutes=request.duration_minutes,
+        )
+
+        s = generated.session
+        kb_session = KettlebellSession(
+            user_id=current_user.id,
+            title=s.title,
+            focus=s.focus,
+            exercises={"exercises": [ex.model_dump() for ex in s.exercises]},
+            total_duration_min=s.total_duration_min,
+            difficulty=s.difficulty,
+            notes=s.notes,
+            status="generated",
+        )
+        session.add(kb_session)
+        session.commit()
+        session.refresh(kb_session)
+        return kb_session
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=str(e))
+
+
+@router.get("/", response_model=List[KettlebellSession])
+def list_sessions(
+    current_user: deps.CurrentUser,
+    session: Session = Depends(deps.get_session),
+) -> Any:
+    """Get all kettlebell sessions for the current user."""
+    statement = (
+        select(KettlebellSession)
+        .where(KettlebellSession.user_id == current_user.id)
+        .order_by(KettlebellSession.created_at.desc())
+    )
+    return session.exec(statement).all()
+
+
+@router.get("/{session_id}", response_model=KettlebellSession)
+def get_session(
+    session_id: int,
+    current_user: deps.CurrentUser,
+    session: Session = Depends(deps.get_session),
+) -> Any:
+    """Get a single kettlebell session."""
+    kb_session = session.get(KettlebellSession, session_id)
+    if not kb_session:
+        raise HTTPException(status_code=404, detail="Session not found")
+    if kb_session.user_id != current_user.id:
+        raise HTTPException(status_code=403, detail="Not authorized")
+    return kb_session
+
+
+@router.patch("/{session_id}/start", response_model=KettlebellSession)
+def start_session(
+    session_id: int,
+    current_user: deps.CurrentUser,
+    session: Session = Depends(deps.get_session),
+) -> Any:
+    """Mark a session as in progress."""
+    kb_session = session.get(KettlebellSession, session_id)
+    if not kb_session:
+        raise HTTPException(status_code=404, detail="Session not found")
+    if kb_session.user_id != current_user.id:
+        raise HTTPException(status_code=403, detail="Not authorized")
+    kb_session.status = "in_progress"
+    kb_session.started_at = datetime.utcnow()
+    session.add(kb_session)
+    session.commit()
+    session.refresh(kb_session)
+    return kb_session
+
+
+@router.post("/{session_id}/sets", response_model=KettlebellSetLog)
+def log_set(
+    session_id: int,
+    request: LogSetRequest,
+    current_user: deps.CurrentUser,
+    session: Session = Depends(deps.get_session),
+) -> Any:
+    """Log a completed set."""
+    kb_session = session.get(KettlebellSession, session_id)
+    if not kb_session:
+        raise HTTPException(status_code=404, detail="Session not found")
+    if kb_session.user_id != current_user.id:
+        raise HTTPException(status_code=403, detail="Not authorized")
+    set_log = KettlebellSetLog(
+        session_id=session_id,
+        exercise_order=request.exercise_order,
+        set_number=request.set_number,
+        actual_reps=request.actual_reps,
+        actual_weight_kg=request.actual_weight_kg,
+        actual_duration_seconds=request.actual_duration_seconds,
+        perceived_effort=request.perceived_effort,
+    )
+    session.add(set_log)
+    session.commit()
+    session.refresh(set_log)
+    return set_log
+
+
+@router.get("/{session_id}/sets", response_model=List[KettlebellSetLog])
+def get_sets(
+    session_id: int,
+    current_user: deps.CurrentUser,
+    session: Session = Depends(deps.get_session),
+) -> Any:
+    """Get all logged sets for a session."""
+    kb_session = session.get(KettlebellSession, session_id)
+    if not kb_session:
+        raise HTTPException(status_code=404, detail="Session not found")
+    if kb_session.user_id != current_user.id:
+        raise HTTPException(status_code=403, detail="Not authorized")
+    statement = select(KettlebellSetLog).where(KettlebellSetLog.session_id == session_id)
+    return session.exec(statement).all()
+
+
+@router.post("/{session_id}/retry", response_model=KettlebellSession)
+def retry_session(
+    session_id: int,
+    current_user: deps.CurrentUser,
+    session: Session = Depends(deps.get_session),
+) -> Any:
+    """Clone an abandoned session as a fresh generated session."""
+    kb_session = session.get(KettlebellSession, session_id)
+    if not kb_session:
+        raise HTTPException(status_code=404, detail="Session not found")
+    if kb_session.user_id != current_user.id:
+        raise HTTPException(status_code=403, detail="Not authorized")
+    new_session = KettlebellSession(
+        user_id=current_user.id,
+        title=kb_session.title,
+        focus=kb_session.focus,
+        exercises=kb_session.exercises,
+        total_duration_min=kb_session.total_duration_min,
+        difficulty=kb_session.difficulty,
+        notes="",
+        status="generated",
+    )
+    session.add(new_session)
+    session.commit()
+    session.refresh(new_session)
+    return new_session
+
+
+@router.patch("/{session_id}/abandon", response_model=KettlebellSession)
+def abandon_session(
+    session_id: int,
+    current_user: deps.CurrentUser,
+    session: Session = Depends(deps.get_session),
+) -> Any:
+    """Mark a session as abandoned."""
+    kb_session = session.get(KettlebellSession, session_id)
+    if not kb_session:
+        raise HTTPException(status_code=404, detail="Session not found")
+    if kb_session.user_id != current_user.id:
+        raise HTTPException(status_code=403, detail="Not authorized")
+    kb_session.status = "abandoned"
+    session.add(kb_session)
+    session.commit()
+    session.refresh(kb_session)
+    return kb_session
+
+
+@router.delete("/{session_id}", status_code=204)
+def delete_session(
+    session_id: int,
+    current_user: deps.CurrentUser,
+    session: Session = Depends(deps.get_session),
+) -> None:
+    """Delete a session and all its set logs."""
+    kb_session = session.get(KettlebellSession, session_id)
+    if not kb_session:
+        raise HTTPException(status_code=404, detail="Session not found")
+    if kb_session.user_id != current_user.id:
+        raise HTTPException(status_code=403, detail="Not authorized")
+    statement = select(KettlebellSetLog).where(KettlebellSetLog.session_id == session_id)
+    for log in session.exec(statement).all():
+        session.delete(log)
+    session.flush()
+    session.delete(kb_session)
+    session.commit()
+
+
+@router.patch("/{session_id}/complete", response_model=KettlebellSession)
+def complete_session(
+    session_id: int,
+    request: CompleteSessionRequest,
+    current_user: deps.CurrentUser,
+    session: Session = Depends(deps.get_session),
+) -> Any:
+    """Mark a session as completed."""
+    kb_session = session.get(KettlebellSession, session_id)
+    if not kb_session:
+        raise HTTPException(status_code=404, detail="Session not found")
+    if kb_session.user_id != current_user.id:
+        raise HTTPException(status_code=403, detail="Not authorized")
+    kb_session.status = "completed"
+    kb_session.completed_at = datetime.utcnow()
+    if request.notes is not None:
+        kb_session.notes = request.notes
+    session.add(kb_session)
+    session.commit()
+    session.refresh(kb_session)
+    return kb_session

backend/app/api/v1/endpoints/nutrition.py

@@ -1,9 +1,11 @@
+from datetime import date as date_type
+from datetime import datetime
 from typing import Any
 
 import litellm
-from fastapi import APIRouter, Depends, File, Form, HTTPException, UploadFile
+from fastapi import APIRouter, Depends, File, Form, HTTPException, Query, UploadFile
 from pydantic import BaseModel
-from sqlmodel import Session
+from sqlmodel import Session, select
 
 from app.ai.nutrition import NutritionalInfo, analyze_nutrition_from_image, nutrition_module
 from app.api import deps
@@ -16,9 +18,18 @@ class AnalyzeRequest(BaseModel):
     description: str
 
 
+class FoodLogCreate(BaseModel):
+    name: str
+    calories: float
+    protein: float
+    carbs: float
+    fats: float
+
+
 @router.post("/analyze", response_model=NutritionalInfo)
 def analyze_food(
     request: AnalyzeRequest,
+    current_user: deps.CurrentUser,
 ) -> Any:
     """
     Analyze food description and return nutritional info using DSPy.
@@ -32,6 +43,7 @@ def analyze_food(
 
 @router.post("/analyze/image", response_model=NutritionalInfo)
 async def analyze_food_image(
+    current_user: deps.CurrentUser,
     file: UploadFile = File(...),
     description: str = Form(""),
 ) -> Any:
@@ -51,7 +63,7 @@ async def analyze_food_image(
 def log_food(
     *,
     session: Session = Depends(deps.get_session),
-    nutrition_info: NutritionalInfo,
+    nutrition_info: FoodLogCreate,
     current_user: deps.CurrentUser,
 ) -> Any:
     """
@@ -81,8 +93,6 @@ def read_logs(
     """
     Get food logs for current user.
     """
-    from sqlmodel import select
-
     statement = (
         select(FoodLog)
         .where(FoodLog.user_id == current_user.id)
@@ -91,3 +101,55 @@ def read_logs(
         .limit(limit)
     )
     return session.exec(statement).all()
+
+
+class NutritionSummary(BaseModel):
+    date: str
+    total_calories: float
+    total_protein: float
+    total_carbs: float
+    total_fats: float
+    log_count: int
+    target_calories: float | None
+    target_protein: float | None
+    target_carbs: float | None
+    target_fat: float | None
+
+
+@router.get("/summary", response_model=NutritionSummary)
+def get_nutrition_summary(
+    current_user: deps.CurrentUser,
+    session: Session = Depends(deps.get_session),
+    date: str = Query(default=None, description="Date in YYYY-MM-DD format, defaults to today"),
+) -> Any:
+    """
+    Get aggregated macro totals for a given day.
+    """
+    if date:
+        target_date = datetime.strptime(date, "%Y-%m-%d").date()
+    else:
+        target_date = date_type.today()
+
+    start = datetime(target_date.year, target_date.month, target_date.day, 0, 0, 0)
+    end = datetime(target_date.year, target_date.month, target_date.day, 23, 59, 59)
+
+    statement = (
+        select(FoodLog)
+        .where(FoodLog.user_id == current_user.id)
+        .where(FoodLog.timestamp >= start)
+        .where(FoodLog.timestamp <= end)
+    )
+    logs = session.exec(statement).all()
+
+    return NutritionSummary(
+        date=target_date.isoformat(),
+        total_calories=sum(log.calories for log in logs),
+        total_protein=sum(log.protein for log in logs),
+        total_carbs=sum(log.carbs for log in logs),
+        total_fats=sum(log.fats for log in logs),
+        log_count=len(logs),
+        target_calories=getattr(current_user, "target_calories", None),
+        target_protein=getattr(current_user, "target_protein", None),
+        target_carbs=getattr(current_user, "target_carbs", None),
+        target_fat=getattr(current_user, "target_fat", None),
+    )

backend/app/api/v1/endpoints/push.py

@@ -0,0 +1,126 @@
+import json
+
+from fastapi import APIRouter, Depends, HTTPException
+from pydantic import BaseModel
+from pywebpush import WebPushException, webpush
+from sqlmodel import Session, select
+
+from app.api import deps
+from app.config import settings
+from app.models.push_subscription import PushSubscription
+
+router = APIRouter()
+
+
+class SubscriptionKeys(BaseModel):
+    p256dh: str
+    auth: str
+
+
+class SubscribeRequest(BaseModel):
+    endpoint: str
+    keys: SubscriptionKeys
+    reminder_hour: int = 9
+    reminder_minute: int = 0
+    timezone: str = "UTC"
+
+
+class UnsubscribeRequest(BaseModel):
+    endpoint: str
+
+
+def send_push(
+    subscriptions: list[PushSubscription],
+    title: str,
+    body: str,
+    url: str = "/supplements",
+    session: Session | None = None,
+) -> None:
+    payload = json.dumps({"title": title, "body": body, "url": url})
+    for sub in subscriptions:
+        try:
+            webpush(
+                subscription_info={
+                    "endpoint": sub.endpoint,
+                    "keys": {"p256dh": sub.p256dh, "auth": sub.auth},
+                },
+                data=payload,
+                vapid_private_key=settings.VAPID_PRIVATE_KEY,
+                vapid_claims={"sub": settings.VAPID_MAILTO},
+            )
+        except WebPushException as ex:
+            if ex.response and ex.response.status_code in (404, 410):
+                sub.is_active = False
+                if session:
+                    session.add(sub)
+
+
+@router.get("/vapid-public-key")
+def get_vapid_public_key() -> dict:
+    return {"public_key": settings.VAPID_PUBLIC_KEY}
+
+
+@router.post("/subscribe", status_code=201)
+def subscribe(
+    data: SubscribeRequest,
+    current_user: deps.CurrentUser,
+    session: Session = Depends(deps.get_session),
+) -> dict:
+    existing = session.exec(select(PushSubscription).where(PushSubscription.endpoint == data.endpoint)).first()
+    if existing:
+        existing.user_id = current_user.id
+        existing.p256dh = data.keys.p256dh
+        existing.auth = data.keys.auth
+        existing.reminder_hour = data.reminder_hour
+        existing.reminder_minute = data.reminder_minute
+        existing.timezone = data.timezone
+        existing.is_active = True
+        session.add(existing)
+    else:
+        sub = PushSubscription(
+            user_id=current_user.id,
+            endpoint=data.endpoint,
+            p256dh=data.keys.p256dh,
+            auth=data.keys.auth,
+            reminder_hour=data.reminder_hour,
+            reminder_minute=data.reminder_minute,
+            timezone=data.timezone,
+        )
+        session.add(sub)
+    session.commit()
+    return {"status": "subscribed"}
+
+
+@router.delete("/unsubscribe")
+def unsubscribe(
+    data: UnsubscribeRequest,
+    current_user: deps.CurrentUser,
+    session: Session = Depends(deps.get_session),
+) -> dict:
+    sub = session.exec(
+        select(PushSubscription)
+        .where(PushSubscription.endpoint == data.endpoint)
+        .where(PushSubscription.user_id == current_user.id)
+    ).first()
+    if sub:
+        sub.is_active = False
+        session.add(sub)
+        session.commit()
+    return {"status": "unsubscribed"}
+
+
+@router.post("/test")
+def send_test_notification(
+    current_user: deps.CurrentUser,
+    session: Session = Depends(deps.get_session),
+) -> dict:
+    subs = session.exec(
+        select(PushSubscription)
+        .where(PushSubscription.user_id == current_user.id)
+        .where(PushSubscription.is_active == True)  # noqa: E712
+    ).all()
+    if not subs:
+        raise HTTPException(status_code=404, detail="No active subscriptions")
+    send_push(list(subs), title="Test Notification", body="Push notifications are working!", session=session)
+    session.commit()
+    return {"sent": len(subs)}

backend/app/api/v1/endpoints/supplements.py

@@ -0,0 +1,238 @@
+from datetime import date, datetime
+from typing import Any, List, Optional
+
+from fastapi import APIRouter, Depends, HTTPException, Query
+from pydantic import BaseModel
+from sqlmodel import Session, select
+
+from app.api import deps
+from app.models.supplement import Supplement, SupplementLog
+
+router = APIRouter()
+
+
+class SupplementCreate(BaseModel):
+    name: str
+    dosage: float
+    unit: str
+    frequency: str = "daily"
+    scheduled_times: List[str] = []
+    notes: Optional[str] = None
+
+
+class SupplementUpdate(BaseModel):
+    name: Optional[str] = None
+    dosage: Optional[float] = None
+    unit: Optional[str] = None
+    frequency: Optional[str] = None
+    scheduled_times: Optional[List[str]] = None
+    notes: Optional[str] = None
+    is_active: Optional[bool] = None
+
+
+class SupplementLogCreate(BaseModel):
+    dose_taken: Optional[float] = None
+    notes: Optional[str] = None
+    taken_at: Optional[datetime] = None
+
+
+class SupplementWithStatus(BaseModel):
+    id: int
+    name: str
+    dosage: float
+    unit: str
+    frequency: str
+    scheduled_times: List[str]
+    notes: Optional[str]
+    is_active: bool
+    created_at: datetime
+    taken_today: bool
+    streak: int
+
+
+@router.get("/", response_model=List[Supplement])
+def list_supplements(
+    current_user: deps.CurrentUser,
+    session: Session = Depends(deps.get_session),
+) -> Any:
+    statement = (
+        select(Supplement)
+        .where(Supplement.user_id == current_user.id)
+        .where(Supplement.is_active)
+        .order_by(Supplement.name)
+    )
+    return session.exec(statement).all()
+
+
+@router.post("/", response_model=Supplement)
+def create_supplement(
+    *,
+    current_user: deps.CurrentUser,
+    session: Session = Depends(deps.get_session),
+    data: SupplementCreate,
+) -> Any:
+    supplement = Supplement(
+        user_id=current_user.id,
+        name=data.name,
+        dosage=data.dosage,
+        unit=data.unit,
+        frequency=data.frequency,
+        scheduled_times=data.scheduled_times,
+        notes=data.notes,
+    )
+    session.add(supplement)
+    session.commit()
+    session.refresh(supplement)
+    return supplement
+
+
+@router.put("/{supplement_id}", response_model=Supplement)
+def update_supplement(
+    supplement_id: int,
+    data: SupplementUpdate,
+    current_user: deps.CurrentUser,
+    session: Session = Depends(deps.get_session),
+) -> Any:
+    supplement = session.get(Supplement, supplement_id)
+    if not supplement:
+        raise HTTPException(status_code=404, detail="Supplement not found")
+    if supplement.user_id != current_user.id:
+        raise HTTPException(status_code=403, detail="Not authorized")
+    update_data = data.model_dump(exclude_unset=True)
+    for key, value in update_data.items():
+        setattr(supplement, key, value)
+    session.add(supplement)
+    session.commit()
+    session.refresh(supplement)
+    return supplement
+
+
+@router.delete("/{supplement_id}", status_code=204)
+def delete_supplement(
+    supplement_id: int,
+    current_user: deps.CurrentUser,
+    session: Session = Depends(deps.get_session),
+) -> None:
+    supplement = session.get(Supplement, supplement_id)
+    if not supplement:
+        raise HTTPException(status_code=404, detail="Supplement not found")
+    if supplement.user_id != current_user.id:
+        raise HTTPException(status_code=403, detail="Not authorized")
+    # Soft delete
+    supplement.is_active = False
+    session.add(supplement)
+    session.commit()
+
+
+@router.post("/{supplement_id}/log", response_model=SupplementLog)
+def log_supplement(
+    supplement_id: int,
+    data: SupplementLogCreate,
+    current_user: deps.CurrentUser,
+    session: Session = Depends(deps.get_session),
+) -> Any:
+    supplement = session.get(Supplement, supplement_id)
+    if not supplement:
+        raise HTTPException(status_code=404, detail="Supplement not found")
+    if supplement.user_id != current_user.id:
+        raise HTTPException(status_code=403, detail="Not authorized")
+    log = SupplementLog(
+        user_id=current_user.id,
+        supplement_id=supplement_id,
+        taken_at=data.taken_at or datetime.utcnow(),
+        dose_taken=data.dose_taken,
+        notes=data.notes,
+    )
+    session.add(log)
+    session.commit()
+    session.refresh(log)
+    return log
+
+
+@router.get("/logs", response_model=List[SupplementLog])
+def get_supplement_logs(
+    current_user: deps.CurrentUser,
+    session: Session = Depends(deps.get_session),
+    supplement_id: Optional[int] = Query(default=None),
+    start_date: Optional[str] = Query(default=None, description="YYYY-MM-DD"),
+    end_date: Optional[str] = Query(default=None, description="YYYY-MM-DD"),
+) -> Any:
+    statement = select(SupplementLog).where(SupplementLog.user_id == current_user.id)
+    if supplement_id:
+        statement = statement.where(SupplementLog.supplement_id == supplement_id)
+    if start_date:
+        dt = datetime.strptime(start_date, "%Y-%m-%d")
+        statement = statement.where(SupplementLog.taken_at >= dt)
+    if end_date:
+        dt = datetime.strptime(end_date, "%Y-%m-%d").replace(hour=23, minute=59, second=59)
+        statement = statement.where(SupplementLog.taken_at <= dt)
+    statement = statement.order_by(SupplementLog.taken_at.desc())
+    return session.exec(statement).all()
+
+
+@router.get("/today", response_model=List[SupplementWithStatus])
+def get_today_supplements(
+    current_user: deps.CurrentUser,
+    session: Session = Depends(deps.get_session),
+) -> Any:
+    today = date.today()
+    start = datetime(today.year, today.month, today.day, 0, 0, 0)
+    end = datetime(today.year, today.month, today.day, 23, 59, 59)
+
+    supplements = session.exec(
+        select(Supplement)
+        .where(Supplement.user_id == current_user.id)
+        .where(Supplement.is_active)
+        .order_by(Supplement.name)
+    ).all()
+
+    today_logs = session.exec(
+        select(SupplementLog)
+        .where(SupplementLog.user_id == current_user.id)
+        .where(SupplementLog.taken_at >= start)
+        .where(SupplementLog.taken_at <= end)
+    ).all()
+
+    taken_ids = {log.supplement_id for log in today_logs}
+
+    result = []
+    for s in supplements:
+        # Calculate streak: consecutive days taken
+        streak = 0
+        check_date = today
+        while True:
+            d_start = datetime(check_date.year, check_date.month, check_date.day, 0, 0, 0)
+            d_end = datetime(check_date.year, check_date.month, check_date.day, 23, 59, 59)
+            taken = session.exec(
+                select(SupplementLog)
+                .where(SupplementLog.supplement_id == s.id)
+                .where(SupplementLog.taken_at >= d_start)
+                .where(SupplementLog.taken_at <= d_end)
+            ).first()
+            if taken:
+                streak += 1
+                from datetime import timedelta
+
+                check_date = check_date - timedelta(days=1)
+            else:
+                break
+            if streak > 365:
+                break
+
+        result.append(
+            SupplementWithStatus(
+                id=s.id,
+                name=s.name,
+                dosage=s.dosage,
+                unit=s.unit,
+                frequency=s.frequency,
+                scheduled_times=s.scheduled_times or [],
+                notes=s.notes,
+                is_active=s.is_active,
+                created_at=s.created_at,
+                taken_today=s.id in taken_ids,
+                streak=streak,
+            )
+        )
+
+    return result

backend/app/api/v1/endpoints/users.py

@@ -59,6 +59,8 @@ def update_user_me(
     Update own user.
     """
     user_data = user_in.model_dump(exclude_unset=True)
+    if "password" in user_data:
+        user_data["password_hash"] = security.get_password_hash(user_data.pop("password"))
     current_user.sqlmodel_update(user_data)
     session.add(current_user)
     session.commit()

backend/app/models/calendar.py

@@ -0,0 +1,27 @@
+import datetime as dt
+from typing import Optional
+
+from sqlmodel import Field, SQLModel
+
+
+class DailyNote(SQLModel, table=True):
+    id: Optional[int] = Field(default=None, primary_key=True)
+    user_id: int = Field(foreign_key="user.id", index=True)
+    date: dt.date = Field(index=True)
+    content: str = Field(default="", max_length=10000)
+    mood: Optional[str] = None  # "great"/"good"/"okay"/"bad"/"awful"
+    energy_level: Optional[int] = None  # 1–10
+    updated_at: dt.datetime = Field(default_factory=dt.datetime.utcnow)
+
+
+class CalendarEvent(SQLModel, table=True):
+    id: Optional[int] = Field(default=None, primary_key=True)
+    user_id: int = Field(foreign_key="user.id", index=True)
+    date: dt.date = Field(index=True)
+    title: str
+    description: Optional[str] = None
+    event_type: str = "general"  # "workout" | "supplement" | "general"
+    color: Optional[str] = None
+    start_time: Optional[str] = None  # "HH:MM"
+    is_completed: bool = False
+    created_at: dt.datetime = Field(default_factory=dt.datetime.utcnow)

backend/app/models/kettlebell.py

@@ -0,0 +1,44 @@
+from datetime import datetime
+from typing import Optional
+
+from pydantic import BaseModel
+from sqlmodel import JSON, Field, SQLModel
+
+
+class ExerciseBlock(BaseModel):
+    order: int
+    name: str
+    description: str
+    sets: int
+    reps: int
+    duration_seconds: int  # reps=0 → timed, duration_seconds=0 → rep-based
+    weight_kg: float
+    rest_seconds: int
+    coaching_tip: str
+
+
+class KettlebellSession(SQLModel, table=True):
+    id: Optional[int] = Field(default=None, primary_key=True)
+    user_id: int = Field(foreign_key="user.id", index=True)
+    title: str
+    focus: str  # e.g. "strength", "conditioning"
+    exercises: dict = Field(default={}, sa_type=JSON)  # full AI-prescribed exercise list
+    total_duration_min: int
+    difficulty: str
+    notes: str = Field(default="")
+    status: str = Field(default="generated")  # "generated" | "in_progress" | "completed" | "abandoned"
+    started_at: Optional[datetime] = Field(default=None)
+    completed_at: Optional[datetime] = Field(default=None)
+    created_at: datetime = Field(default_factory=datetime.utcnow)
+
+
+class KettlebellSetLog(SQLModel, table=True):
+    id: Optional[int] = Field(default=None, primary_key=True)
+    session_id: int = Field(foreign_key="kettlebellsession.id", index=True)
+    exercise_order: int
+    set_number: int
+    actual_reps: int
+    actual_weight_kg: float
+    actual_duration_seconds: int
+    perceived_effort: int  # 1–10 RPE
+    completed_at: datetime = Field(default_factory=datetime.utcnow)

backend/app/models/push_subscription.py

@@ -0,0 +1,17 @@
+from datetime import datetime
+from typing import Optional
+
+from sqlmodel import Field, SQLModel
+
+
+class PushSubscription(SQLModel, table=True):
+    id: Optional[int] = Field(default=None, primary_key=True)
+    user_id: int = Field(foreign_key="user.id", index=True)
+    endpoint: str = Field(unique=True, index=True)
+    p256dh: str
+    auth: str
+    reminder_hour: int = Field(default=9)
+    reminder_minute: int = Field(default=0)
+    timezone: str = Field(default="UTC")
+    is_active: bool = Field(default=True)
+    created_at: datetime = Field(default_factory=datetime.utcnow)

backend/app/models/supplement.py

@@ -0,0 +1,27 @@
+from datetime import datetime
+from typing import List, Optional
+
+from sqlalchemy import Column
+from sqlmodel import JSON, Field, SQLModel
+
+
+class Supplement(SQLModel, table=True):
+    id: Optional[int] = Field(default=None, primary_key=True)
+    user_id: int = Field(foreign_key="user.id", index=True)
+    name: str = Field(index=True)
+    dosage: float
+    unit: str  # mg / mcg / IU / g
+    frequency: str = Field(default="daily")  # daily / weekly / as_needed
+    scheduled_times: List[str] = Field(default=[], sa_column=Column(JSON))  # ["08:00", "20:00"]
+    notes: Optional[str] = None
+    is_active: bool = Field(default=True)
+    created_at: datetime = Field(default_factory=datetime.utcnow)
+
+
+class SupplementLog(SQLModel, table=True):
+    id: Optional[int] = Field(default=None, primary_key=True)
+    user_id: int = Field(foreign_key="user.id", index=True)
+    supplement_id: int = Field(foreign_key="supplement.id", index=True)
+    taken_at: datetime = Field(default_factory=datetime.utcnow)
+    dose_taken: Optional[float] = None
+    notes: Optional[str] = None

backend/app/models/user.py

@@ -19,4 +19,10 @@ class User(SQLModel, table=True):
     weight: Optional[float] = None
     unit_preference: str = Field(default="metric")  # "metric" or "imperial"
 
+    # Nutrition Targets
+    target_calories: Optional[float] = None
+    target_protein: Optional[float] = None
+    target_carbs: Optional[float] = None
+    target_fat: Optional[float] = None
+
     created_at: datetime = Field(default_factory=datetime.utcnow)

backend/app/scheduler.py

@@ -0,0 +1,47 @@
+from datetime import datetime, timezone
+
+import pytz
+from apscheduler.schedulers.background import BackgroundScheduler
+from apscheduler.triggers.cron import CronTrigger
+from sqlmodel import Session, select
+
+from app.db import engine
+from app.models.push_subscription import PushSubscription
+
+scheduler = BackgroundScheduler(timezone="UTC")
+
+
+def send_supplement_reminders() -> None:
+    from app.api.v1.endpoints.push import send_push
+
+    now_utc = datetime.now(timezone.utc)
+    with Session(engine) as session:
+        subs = session.exec(
+            select(PushSubscription).where(PushSubscription.is_active == True)  # noqa: E712
+        ).all()
+        due = []
+        for sub in subs:
+            try:
+                tz = pytz.timezone(sub.timezone)
+                local_now = now_utc.astimezone(tz)
+                if local_now.hour == sub.reminder_hour and local_now.minute == sub.reminder_minute:
+                    due.append(sub)
+            except Exception:
+                pass
+        if due:
+            send_push(due, title="Supplement Reminder", body="Time to log your supplements for today!", session=session)
+            session.commit()
+
+
+def start_scheduler() -> None:
+    scheduler.add_job(
+        send_supplement_reminders,
+        CronTrigger(minute="*"),
+        id="supplement_reminders",
+        replace_existing=True,
+    )
+    scheduler.start()
+
+
+def stop_scheduler() -> None:
+    scheduler.shutdown(wait=False)

backend/app/schemas/user.py

@@ -21,6 +21,10 @@ class UserRead(UserBase):
     height: Optional[float] = None
     weight: Optional[float] = None
     unit_preference: str = "metric"
+    target_calories: Optional[float] = None
+    target_protein: Optional[float] = None
+    target_carbs: Optional[float] = None
+    target_fat: Optional[float] = None
 
 
 class UserUpdate(SQLModel):
@@ -34,3 +38,7 @@ class UserUpdate(SQLModel):
     height: Optional[float] = None
     weight: Optional[float] = None
     unit_preference: Optional[str] = None
+    target_calories: Optional[float] = None
+    target_protein: Optional[float] = None
+    target_carbs: Optional[float] = None
+    target_fat: Optional[float] = None

backend/requirements.txt

@@ -13,4 +13,7 @@ pytest
 httpx
 python-dotenv
 ruff
+pywebpush
+apscheduler
+pytz
 

frontend/dev-dist/registerSW.js

@@ -0,0 +1 @@
+if('serviceWorker' in navigator) navigator.serviceWorker.register('/dev-sw.js?dev-sw', { scope: '/', type: 'classic' })

frontend/index.html

@@ -4,7 +4,9 @@
     <meta charset="UTF-8" />
     <link rel="icon" type="image/svg+xml" href="/vite.svg" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-    <title>frontend</title>
+    <meta name="theme-color" content="#556B2F" />
+    <meta name="description" content="AI-powered health & fitness tracker" />
+    <title>HealthyFit</title>
   </head>
   <body>
     <div id="root"></div>

frontend/package.json

@@ -14,10 +14,12 @@
     "lucide-react": "^0.562.0",
     "motion": "^12.27.0",
     "react": "^19.2.0",
+    "react-day-picker": "^9.14.0",
     "react-dom": "^19.2.0",
     "react-markdown": "^10.1.0",
     "react-router-dom": "^7.12.0",
-    "recharts": "^3.6.0"
+    "recharts": "^3.6.0",
+    "sonner": "^2.0.7"
   },
   "devDependencies": {
     "@eslint/js": "^9.39.1",
@@ -35,6 +37,7 @@
     "tailwind-merge": "^3.4.0",
     "tailwindcss": "^4.1.18",
     "typescript": "^5.9.3",
-    "vite": "^7.2.4"
+    "vite": "^7.2.4",
+    "vite-plugin-pwa": "^1.2.0"
   }
 }

frontend/public/push-sw.js

@@ -0,0 +1,39 @@
+self.addEventListener('push', (event) => {
+  console.log('[SW] push received', event.data?.text());
+  if (!event.data) return;
+
+  let title = 'HealthyFit';
+  let body = 'You have a new notification';
+  let url = '/';
+  try {
+    const data = event.data.json();
+    title = data.title;
+    body = data.body;
+    url = data.url ?? '/';
+  } catch {
+    body = event.data.text();
+  }
+
+  event.waitUntil(
+    self.registration.showNotification(title, {
+      body,
+      icon: '/icons/icon-192.png',
+      badge: '/icons/icon-192.png',
+      data: { url },
+    })
+  );
+});
+
+self.addEventListener('notificationclick', (event) => {
+  event.notification.close();
+  const url = event.notification.data?.url ?? '/';
+  event.waitUntil(
+    self.clients
+      .matchAll({ type: 'window', includeUncontrolled: true })
+      .then((clients) => {
+        const existing = clients.find((c) => c.url.includes(url));
+        if (existing) return existing.focus();
+        return self.clients.openWindow(url);
+      })
+  );
+});

frontend/src/App.tsx

@@ -1,12 +1,18 @@
 import { BrowserRouter as Router, Routes, Route } from 'react-router-dom';
 import { AuthProvider } from './context/AuthContext';
 import { ThemeProvider } from './context/ThemeContext';
+import { Toaster } from 'sonner';
 import Login from './pages/Login';
 import Dashboard from './pages/Dashboard';
 import Nutrition from './pages/Nutrition';
 import Health from './pages/Health';
 import Plans from './pages/Plans';
 import Profile from './pages/Profile';
+import Kettlebell from './pages/Kettlebell';
+import ActiveSession from './pages/ActiveSession';
+import Supplements from './pages/Supplements';
+import KettlebellAnalytics from './pages/KettlebellAnalytics';
+import CalendarPage from './pages/Calendar';
 import ProtectedRoute from './components/ProtectedRoute';
 import AppLayout from './components/Layout/AppLayout';
 
@@ -15,6 +21,7 @@ function App() {
     <ThemeProvider>
       <AuthProvider>
         <Router>
+          <Toaster richColors position="top-right" />
           <div className="min-h-screen font-sans bg-base text-content transition-colors duration-200">
             <Routes>
               <Route path="/login" element={<Login />} />
@@ -55,6 +62,42 @@ function App() {
                   </AppLayout>
                 </ProtectedRoute>
               } />
+              <Route path="/kettlebell" element={
+                <ProtectedRoute>
+                  <AppLayout>
+                    <Kettlebell />
+                  </AppLayout>
+                </ProtectedRoute>
+              } />
+
+              <Route path="/supplements" element={
+                <ProtectedRoute>
+                  <AppLayout>
+                    <Supplements />
+                  </AppLayout>
+                </ProtectedRoute>
+              } />
+              <Route path="/kettlebell/analytics" element={
+                <ProtectedRoute>
+                  <AppLayout>
+                    <KettlebellAnalytics />
+                  </AppLayout>
+                </ProtectedRoute>
+              } />
+              <Route path="/calendar" element={
+                <ProtectedRoute>
+                  <AppLayout>
+                    <CalendarPage />
+                  </AppLayout>
+                </ProtectedRoute>
+              } />
+
+              {/* Full-screen active session — no AppLayout/sidebar */}
+              <Route path="/kettlebell/session/:id" element={
+                <ProtectedRoute>
+                  <ActiveSession />
+                </ProtectedRoute>
+              } />
             </Routes>
           </div>
         </Router>

frontend/src/api/calendar.ts

@@ -0,0 +1,26 @@
+import client from './client';
+import type { DayMeta, DailyNote, CalendarEvent, DayDetail } from '../types/calendar';
+
+export const getMonthSummary = (year: number, month: number) =>
+  client.get<DayMeta[]>('/calendar/month', { params: { year, month } }).then(r => r.data);
+
+export const getDayDetail = (date: string) =>
+  client.get<DayDetail>('/calendar/day', { params: { date } }).then(r => r.data);
+
+export const getNote = (date: string) =>
+  client.get<DailyNote>(`/calendar/notes/${date}`).then(r => r.data);
+
+export const upsertNote = (date: string, data: { content: string; mood?: string; energy_level?: number }) =>
+  client.put<DailyNote>(`/calendar/notes/${date}`, data).then(r => r.data);
+
+export const getEvents = (start: string, end: string) =>
+  client.get<CalendarEvent[]>('/calendar/events', { params: { start, end } }).then(r => r.data);
+
+export const createEvent = (data: Omit<CalendarEvent, 'id' | 'created_at'>) =>
+  client.post<CalendarEvent>('/calendar/events', data).then(r => r.data);
+
+export const updateEvent = (id: number, data: Partial<Omit<CalendarEvent, 'id' | 'date' | 'created_at'>>) =>
+  client.put<CalendarEvent>(`/calendar/events/${id}`, data).then(r => r.data);
+
+export const deleteEvent = (id: number) =>
+  client.delete(`/calendar/events/${id}`);

frontend/src/api/health.ts

@@ -0,0 +1,14 @@
+import client from './client';
+import type { HealthGoal, HealthGoalCreate, HealthMetric, HealthMetricCreate } from '../types/health';
+
+export const getMetrics = (limit = 100) =>
+  client.get<HealthMetric[]>('/health/metrics', { params: { limit } }).then(r => r.data);
+
+export const createMetric = (data: HealthMetricCreate) =>
+  client.post<HealthMetric>('/health/metrics', data).then(r => r.data);
+
+export const getGoals = () =>
+  client.get<HealthGoal[]>('/health/goals').then(r => r.data);
+
+export const createGoal = (data: HealthGoalCreate) =>
+  client.post<HealthGoal>('/health/goals', data).then(r => r.data);

frontend/src/api/kettlebell.ts

@@ -0,0 +1,51 @@
+import client from './client';
+import type { KettlebellSession, KettlebellSetLog } from '../types/kettlebell';
+
+export interface GenerateSessionRequest {
+    focus: string;
+    duration_minutes: number;
+    available_weights: number[];
+}
+
+export interface LogSetRequest {
+    exercise_order: number;
+    set_number: number;
+    actual_reps: number;
+    actual_weight_kg: number;
+    actual_duration_seconds: number;
+    perceived_effort: number;
+}
+
+export interface CompleteSessionRequest {
+    notes?: string;
+}
+
+export const generateSession = (data: GenerateSessionRequest) =>
+    client.post<KettlebellSession>('/kettlebell/generate', data).then(r => r.data);
+
+export const getSessions = () =>
+    client.get<KettlebellSession[]>('/kettlebell/').then(r => r.data);
+
+export const getSession = (id: number) =>
+    client.get<KettlebellSession>(`/kettlebell/${id}`).then(r => r.data);
+
+export const startSession = (id: number) =>
+    client.patch<KettlebellSession>(`/kettlebell/${id}/start`).then(r => r.data);
+
+export const logSet = (id: number, data: LogSetRequest) =>
+    client.post<KettlebellSetLog>(`/kettlebell/${id}/sets`, data).then(r => r.data);
+
+export const getSets = (id: number) =>
+    client.get<KettlebellSetLog[]>(`/kettlebell/${id}/sets`).then(r => r.data);
+
+export const completeSession = (id: number, data: CompleteSessionRequest = {}) =>
+    client.patch<KettlebellSession>(`/kettlebell/${id}/complete`, data).then(r => r.data);
+
+export const retrySession = (id: number) =>
+    client.post<KettlebellSession>(`/kettlebell/${id}/retry`).then(r => r.data);
+
+export const abandonSession = (id: number) =>
+    client.patch<KettlebellSession>(`/kettlebell/${id}/abandon`).then(r => r.data);
+
+export const deleteSession = (id: number) =>
+    client.delete(`/kettlebell/${id}`);

frontend/src/api/nutrition.ts

@@ -0,0 +1,27 @@
+import client from './client';
+import type { FoodLog, FoodLogCreate, NutritionalInfo, NutritionSummary } from '../types/nutrition';
+
+export const analyzeFoodText = (description: string) =>
+  client.post<NutritionalInfo>('/nutrition/analyze', { description }).then(r => r.data);
+
+export const analyzeFoodImage = (file: File, description = '') => {
+  const formData = new FormData();
+  formData.append('file', file);
+  if (description) formData.append('description', description);
+  return client
+    .post<NutritionalInfo>('/nutrition/analyze/image', formData, {
+      headers: { 'Content-Type': 'multipart/form-data' },
+    })
+    .then(r => r.data);
+};
+
+export const logFood = (data: FoodLogCreate) =>
+  client.post<FoodLog>('/nutrition/log', data).then(r => r.data);
+
+export const getLogs = (skip = 0, limit = 100) =>
+  client.get<FoodLog[]>('/nutrition/logs', { params: { skip, limit } }).then(r => r.data);
+
+export const getNutritionSummary = (date?: string) =>
+  client
+    .get<NutritionSummary>('/nutrition/summary', { params: date ? { date } : undefined })
+    .then(r => r.data);

frontend/src/api/plans.ts

@@ -0,0 +1,8 @@
+import client from './client';
+import type { Plan, PlanRequest } from '../types/plans';
+
+export const getPlans = () =>
+  client.get<Plan[]>('/plans/').then(r => r.data);
+
+export const generatePlan = (data: PlanRequest) =>
+  client.post<Plan>('/plans/generate', data).then(r => r.data);

frontend/src/api/push.ts

@@ -0,0 +1,32 @@
+import client from './client';
+
+export interface PushSubscribeRequest {
+  endpoint: string;
+  keys: { p256dh: string; auth: string };
+  reminder_hour: number;
+  reminder_minute: number;
+  timezone: string;
+}
+
+export const getVapidPublicKey = (): Promise<string> =>
+  client.get<{ public_key: string }>('/push/vapid-public-key').then((r) => r.data.public_key);
+
+export const subscribePush = (data: PushSubscribeRequest): Promise<void> =>
+  client.post('/push/subscribe', data).then((r) => r.data);
+
+export const unsubscribePush = (endpoint: string): Promise<void> =>
+  client.delete('/push/unsubscribe', { data: { endpoint } }).then((r) => r.data);
+
+export const sendTestNotification = (): Promise<{ sent: number }> =>
+  client.post('/push/test').then((r) => r.data);
+
+export function urlBase64ToUint8Array(base64String: string): Uint8Array<ArrayBuffer> {
+  const padding = '='.repeat((4 - (base64String.length % 4)) % 4);
+  const base64 = (base64String + padding).replace(/-/g, '+').replace(/_/g, '/');
+  const rawData = atob(base64);
+  const output = new Uint8Array(rawData.length);
+  for (let i = 0; i < rawData.length; i++) {
+    output[i] = rawData.charCodeAt(i);
+  }
+  return output;
+}

frontend/src/api/supplements.ts

@@ -0,0 +1,32 @@
+import client from './client';
+import type {
+  Supplement,
+  SupplementCreate,
+  SupplementLog,
+  SupplementUpdate,
+  SupplementWithStatus,
+} from '../types/supplement';
+
+export const getSupplements = () =>
+  client.get<Supplement[]>('/supplements/').then(r => r.data);
+
+export const createSupplement = (data: SupplementCreate) =>
+  client.post<Supplement>('/supplements/', data).then(r => r.data);
+
+export const updateSupplement = (id: number, data: SupplementUpdate) =>
+  client.put<Supplement>(`/supplements/${id}`, data).then(r => r.data);
+
+export const deleteSupplement = (id: number) =>
+  client.delete(`/supplements/${id}`);
+
+export const logSupplement = (id: number, data: { dose_taken?: number; notes?: string } = {}) =>
+  client.post<SupplementLog>(`/supplements/${id}/log`, data).then(r => r.data);
+
+export const getSupplementLogs = (params?: {
+  supplement_id?: number;
+  start_date?: string;
+  end_date?: string;
+}) => client.get<SupplementLog[]>('/supplements/logs', { params }).then(r => r.data);
+
+export const getTodaySupplements = () =>
+  client.get<SupplementWithStatus[]>('/supplements/today').then(r => r.data);

frontend/src/api/users.ts

@@ -0,0 +1,8 @@
+import client from './client';
+import type { User, UserUpdate } from '../types/user';
+
+export const getMe = () =>
+  client.get<User>('/users/me').then(r => r.data);
+
+export const updateMe = (data: UserUpdate) =>
+  client.put<User>('/users/me', data).then(r => r.data);

frontend/src/components/ConfirmModal.tsx

@@ -0,0 +1,47 @@
+interface ConfirmModalProps {
+    title: string;
+    message: string;
+    confirmLabel?: string;
+    cancelLabel?: string;
+    destructive?: boolean;
+    onConfirm: () => void;
+    onCancel: () => void;
+}
+
+export function ConfirmModal({
+    title,
+    message,
+    confirmLabel = 'Confirm',
+    cancelLabel = 'Cancel',
+    destructive = false,
+    onConfirm,
+    onCancel,
+}: ConfirmModalProps) {
+    return (
+        <div className="fixed inset-0 z-50 flex items-center justify-center px-4">
+            <div className="absolute inset-0 bg-black/60" onClick={onCancel} />
+            <div className="relative bg-surface border border-border rounded-2xl shadow-xl w-full max-w-sm p-6 flex flex-col gap-4">
+                <h2 className="text-lg font-bold text-content">{title}</h2>
+                <p className="text-sm text-content-muted">{message}</p>
+                <div className="flex gap-3 justify-end mt-2">
+                    <button
+                        onClick={onCancel}
+                        className="px-4 py-2 rounded-xl border border-border text-content text-sm hover:bg-base transition-colors"
+                    >
+                        {cancelLabel}
+                    </button>
+                    <button
+                        onClick={onConfirm}
+                        className={`px-4 py-2 rounded-xl text-sm font-semibold transition-colors ${
+                            destructive
+                                ? 'bg-red-600 hover:bg-red-500 text-white'
+                                : 'bg-primary hover:bg-primary/90 text-white'
+                        }`}
+                    >
+                        {confirmLabel}
+                    </button>
+                </div>
+            </div>
+        </div>
+    );
+}

frontend/src/components/Layout/AppSidebar.tsx

@@ -14,10 +14,13 @@ import {
     Utensils,
     Heart,
     Calendar,
+    CalendarDays,
     User,
     Moon,
     Sun,
     LogOut,
+    Dumbbell,
+    Pill,
 } from 'lucide-react'
 import { useLocation } from 'react-router-dom'
 import { useTheme } from '../../context/ThemeContext'
@@ -34,6 +37,9 @@ export function AppSidebar() {
         { to: "/", icon: LayoutDashboard, label: "Dashboard" },
         { to: "/nutrition", icon: Utensils, label: "Nutrition" },
         { to: "/health", icon: Heart, label: "Health" },
+        { to: "/kettlebell", icon: Dumbbell, label: "Kettlebell" },
+        { to: "/supplements", icon: Pill, label: "Supplements" },
+        { to: "/calendar", icon: CalendarDays, label: "Calendar" },
         { to: "/plans", icon: Calendar, label: "Plans" },
         { to: "/profile", icon: User, label: "Profile" },
     ]

frontend/src/components/calendar/CalendarEventForm.tsx

@@ -0,0 +1,173 @@
+import { useState, FormEvent } from 'react';
+import type { CalendarEvent } from '../../types/calendar';
+import { createEvent, updateEvent } from '../../api/calendar';
+import { toast } from 'sonner';
+
+const COLOR_SWATCHES = [
+  { label: 'Blue', value: 'blue', cls: 'bg-blue-500' },
+  { label: 'Green', value: 'green', cls: 'bg-green-500' },
+  { label: 'Red', value: 'red', cls: 'bg-red-500' },
+  { label: 'Purple', value: 'purple', cls: 'bg-purple-500' },
+  { label: 'Orange', value: 'orange', cls: 'bg-orange-500' },
+  { label: 'Pink', value: 'pink', cls: 'bg-pink-500' },
+];
+
+interface Props {
+  date: string;
+  existing?: CalendarEvent;
+  defaultType?: CalendarEvent['event_type'];
+  onSuccess: () => void;
+  onCancel: () => void;
+}
+
+export default function CalendarEventForm({ date, existing, defaultType = 'general', onSuccess, onCancel }: Props) {
+  const [title, setTitle] = useState(existing?.title ?? '');
+  const [description, setDescription] = useState(existing?.description ?? '');
+  const [eventType, setEventType] = useState<CalendarEvent['event_type']>(existing?.event_type ?? defaultType);
+  const [color, setColor] = useState(existing?.color ?? '');
+  const [startTime, setStartTime] = useState(existing?.start_time ?? '');
+  const [isCompleted, setIsCompleted] = useState(existing?.is_completed ?? false);
+  const [submitting, setSubmitting] = useState(false);
+
+  const handleSubmit = async (e: FormEvent) => {
+    e.preventDefault();
+    if (!title.trim()) {
+      toast.error('Title is required');
+      return;
+    }
+    setSubmitting(true);
+    try {
+      if (existing?.id) {
+        await updateEvent(existing.id, {
+          title: title.trim(),
+          description: description.trim() || undefined,
+          event_type: eventType,
+          color: color || undefined,
+          start_time: startTime || undefined,
+          is_completed: isCompleted,
+        });
+        toast.success('Event updated');
+      } else {
+        await createEvent({
+          date,
+          title: title.trim(),
+          description: description.trim() || undefined,
+          event_type: eventType,
+          color: color || undefined,
+          start_time: startTime || undefined,
+          is_completed: isCompleted,
+        });
+        toast.success('Event created');
+      }
+      onSuccess();
+    } catch {
+      toast.error('Failed to save event');
+    } finally {
+      setSubmitting(false);
+    }
+  };
+
+  return (
+    <form onSubmit={handleSubmit} className="space-y-4">
+      <div>
+        <label className="block text-sm font-medium text-zinc-700 dark:text-zinc-300 mb-1">
+          Title <span className="text-red-500">*</span>
+        </label>
+        <input
+          type="text"
+          value={title}
+          onChange={e => setTitle(e.target.value)}
+          className="w-full rounded-md border border-zinc-300 dark:border-zinc-600 bg-white dark:bg-zinc-800 px-3 py-2 text-sm text-zinc-900 dark:text-zinc-100 focus:outline-none focus:ring-2 focus:ring-primary"
+          placeholder="Event title"
+          required
+        />
+      </div>
+
+      <div>
+        <label className="block text-sm font-medium text-zinc-700 dark:text-zinc-300 mb-1">
+          Description
+        </label>
+        <textarea
+          value={description}
+          onChange={e => setDescription(e.target.value)}
+          rows={2}
+          className="w-full rounded-md border border-zinc-300 dark:border-zinc-600 bg-white dark:bg-zinc-800 px-3 py-2 text-sm text-zinc-900 dark:text-zinc-100 focus:outline-none focus:ring-2 focus:ring-primary resize-none"
+          placeholder="Optional description"
+        />
+      </div>
+
+      <div className="grid grid-cols-2 gap-3">
+        <div>
+          <label className="block text-sm font-medium text-zinc-700 dark:text-zinc-300 mb-1">Type</label>
+          <select
+            value={eventType}
+            onChange={e => setEventType(e.target.value as CalendarEvent['event_type'])}
+            className="w-full rounded-md border border-zinc-300 dark:border-zinc-600 bg-white dark:bg-zinc-800 px-3 py-2 text-sm text-zinc-900 dark:text-zinc-100 focus:outline-none focus:ring-2 focus:ring-primary"
+          >
+            <option value="general">General</option>
+            <option value="workout">Workout</option>
+            <option value="supplement">Supplement</option>
+          </select>
+        </div>
+        <div>
+          <label className="block text-sm font-medium text-zinc-700 dark:text-zinc-300 mb-1">Start Time</label>
+          <input
+            type="time"
+            value={startTime}
+            onChange={e => setStartTime(e.target.value)}
+            className="w-full rounded-md border border-zinc-300 dark:border-zinc-600 bg-white dark:bg-zinc-800 px-3 py-2 text-sm text-zinc-900 dark:text-zinc-100 focus:outline-none focus:ring-2 focus:ring-primary"
+          />
+        </div>
+      </div>
+
+      <div>
+        <label className="block text-sm font-medium text-zinc-700 dark:text-zinc-300 mb-2">Color</label>
+        <div className="flex gap-2">
+          <button
+            type="button"
+            onClick={() => setColor('')}
+            className={`w-7 h-7 rounded-full border-2 bg-zinc-200 dark:bg-zinc-600 ${!color ? 'border-primary' : 'border-transparent'}`}
+            title="None"
+          />
+          {COLOR_SWATCHES.map(s => (
+            <button
+              key={s.value}
+              type="button"
+              onClick={() => setColor(s.value)}
+              className={`w-7 h-7 rounded-full border-2 ${s.cls} ${color === s.value ? 'border-primary' : 'border-transparent'}`}
+              title={s.label}
+            />
+          ))}
+        </div>
+      </div>
+
+      <div className="flex items-center gap-2">
+        <input
+          id="is-completed"
+          type="checkbox"
+          checked={isCompleted}
+          onChange={e => setIsCompleted(e.target.checked)}
+          className="rounded border-zinc-300 dark:border-zinc-600 text-primary focus:ring-primary"
+        />
+        <label htmlFor="is-completed" className="text-sm text-zinc-700 dark:text-zinc-300">Mark as completed</label>
+      </div>
+
+      <div className="flex gap-2 pt-2">
+        <button
+          type="submit"
+          disabled={submitting}
+          className="flex-1 rounded-md bg-primary px-4 py-2 text-sm font-medium text-white hover:bg-primary/90 disabled:opacity-50 transition-colors"
+        >
+          {submitting ? 'Saving...' : existing ? 'Update' : 'Create'}
+        </button>
+        <button
+          type="button"
+          onClick={onCancel}
+          className="flex-1 rounded-md border border-zinc-300 dark:border-zinc-600 px-4 py-2 text-sm font-medium text-zinc-700 dark:text-zinc-300 hover:bg-zinc-50 dark:hover:bg-zinc-800 transition-colors"
+        >
+          Cancel
+        </button>
+      </div>
+    </form>
+  );
+}

frontend/src/components/calendar/DayModal.tsx

@@ -0,0 +1,420 @@
+import { useState, useRef, useEffect, useCallback } from 'react';
+import { X, Dumbbell, Pill, FileText, Plus, Pencil, Trash2, CheckCircle2, Circle } from 'lucide-react';
+import { toast } from 'sonner';
+import type { DayDetail, CalendarEvent as CalEvent } from '../../types/calendar';
+import { upsertNote, deleteEvent } from '../../api/calendar';
+import CalendarEventForm from './CalendarEventForm';
+
+const MOOD_OPTIONS = [
+  { value: 'great', emoji: '😄', label: 'Great' },
+  { value: 'good', emoji: '🙂', label: 'Good' },
+  { value: 'okay', emoji: '😐', label: 'Okay' },
+  { value: 'bad', emoji: '😕', label: 'Bad' },
+  { value: 'awful', emoji: '😞', label: 'Awful' },
+];
+
+function formatDate(dateStr: string): string {
+  const [year, month, day] = dateStr.split('-').map(Number);
+  return new Date(year, month - 1, day).toLocaleDateString('en-US', {
+    weekday: 'long', year: 'numeric', month: 'long', day: 'numeric',
+  });
+}
+
+function colorClass(color?: string): string {
+  const map: Record<string, string> = {
+    blue: 'bg-blue-100 text-blue-700 dark:bg-blue-900/30 dark:text-blue-300',
+    green: 'bg-green-100 text-green-700 dark:bg-green-900/30 dark:text-green-300',
+    red: 'bg-red-100 text-red-700 dark:bg-red-900/30 dark:text-red-300',
+    purple: 'bg-purple-100 text-purple-700 dark:bg-purple-900/30 dark:text-purple-300',
+    orange: 'bg-orange-100 text-orange-700 dark:bg-orange-900/30 dark:text-orange-300',
+    pink: 'bg-pink-100 text-pink-700 dark:bg-pink-900/30 dark:text-pink-300',
+  };
+  return color && map[color] ? map[color] : 'bg-zinc-100 text-zinc-700 dark:bg-zinc-800 dark:text-zinc-300';
+}
+
+// ── Workout Tab ───────────────────────────────────────────────────────────────
+
+function WorkoutTab({ detail, onRefresh }: { detail: DayDetail; onRefresh: () => void }) {
+  const [showForm, setShowForm] = useState(false);
+  const [editEvent, setEditEvent] = useState<CalEvent | null>(null);
+
+  const workoutEvents = detail.events.filter(e => e.event_type === 'workout');
+
+  const handleDelete = async (id: number) => {
+    try {
+      await deleteEvent(id);
+      toast.success('Event deleted');
+      onRefresh();
+    } catch {
+      toast.error('Failed to delete event');
+    }
+  };
+
+  if (showForm || editEvent) {
+    return (
+      <div>
+        <h3 className="text-sm font-medium text-zinc-500 dark:text-zinc-400 mb-3">
+          {editEvent ? 'Edit Event' : 'Add Workout Event'}
+        </h3>
+        <CalendarEventForm
+          date={detail.date}
+          existing={editEvent ?? undefined}
+          defaultType="workout"
+          onSuccess={() => { setShowForm(false); setEditEvent(null); onRefresh(); }}
+          onCancel={() => { setShowForm(false); setEditEvent(null); }}
+        />
+      </div>
+    );
+  }
+
+  return (
+    <div className="space-y-4">
+      {/* Kettlebell sessions */}
+      {detail.kettlebell_sessions.length > 0 && (
+        <div>
+          <h3 className="text-xs font-semibold uppercase tracking-wide text-zinc-500 dark:text-zinc-400 mb-2">
+            Kettlebell Sessions
+          </h3>
+          <div className="space-y-2">
+            {detail.kettlebell_sessions.map(kb => (
+              <div key={kb.id} className="rounded-lg border border-zinc-200 dark:border-zinc-700 p-3">
+                <div className="flex items-start justify-between">
+                  <div>
+                    <p className="text-sm font-medium text-zinc-900 dark:text-zinc-100">{kb.title}</p>
+                    <p className="text-xs text-zinc-500 dark:text-zinc-400 mt-0.5">
+                      {kb.focus} · {kb.total_duration_min} min · {kb.difficulty}
+                    </p>
+                  </div>
+                  <span className={`text-xs px-2 py-0.5 rounded-full font-medium ${
+                    kb.status === 'completed'
+                      ? 'bg-green-100 text-green-700 dark:bg-green-900/30 dark:text-green-300'
+                      : 'bg-zinc-100 text-zinc-600 dark:bg-zinc-800 dark:text-zinc-400'
+                  }`}>
+                    {kb.status}
+                  </span>
+                </div>
+              </div>
+            ))}
+          </div>
+        </div>
+      )}
+
+      {/* Workout events */}
+      {workoutEvents.length > 0 && (
+        <div>
+          <h3 className="text-xs font-semibold uppercase tracking-wide text-zinc-500 dark:text-zinc-400 mb-2">
+            Workout Events
+          </h3>
+          <div className="space-y-2">
+            {workoutEvents.map(ev => (
+              <div key={ev.id} className={`rounded-lg p-3 ${colorClass(ev.color)}`}>
+                <div className="flex items-start justify-between gap-2">
+                  <div className="min-w-0 flex-1">
+                    <div className="flex items-center gap-1.5">
+                      {ev.is_completed ? <CheckCircle2 size={14} /> : <Circle size={14} />}
+                      <p className="text-sm font-medium truncate">{ev.title}</p>
+                    </div>
+                    {ev.description && (
+                      <p className="text-xs mt-0.5 opacity-75 truncate">{ev.description}</p>
+                    )}
+                    {ev.start_time && (
+                      <p className="text-xs mt-0.5 opacity-60">{ev.start_time}</p>
+                    )}
+                  </div>
+                  <div className="flex gap-1 shrink-0">
+                    <button onClick={() => setEditEvent(ev)} className="p-1 rounded hover:opacity-75 transition-opacity">
+                      <Pencil size={13} />
+                    </button>
+                    <button onClick={() => ev.id && handleDelete(ev.id)} className="p-1 rounded hover:opacity-75 transition-opacity">
+                      <Trash2 size={13} />
+                    </button>
+                  </div>
+                </div>
+              </div>
+            ))}
+          </div>
+        </div>
+      )}
+
+      {detail.kettlebell_sessions.length === 0 && workoutEvents.length === 0 && (
+        <p className="text-sm text-zinc-400 dark:text-zinc-500 text-center py-6">No workouts logged for this day.</p>
+      )}
+
+      <button
+        onClick={() => setShowForm(true)}
+        className="flex items-center gap-2 text-sm text-primary hover:text-primary/80 transition-colors"
+      >
+        <Plus size={15} /> Add workout event
+      </button>
+    </div>
+  );
+}
+
+// ── Supplements Tab ───────────────────────────────────────────────────────────
+
+function SupplementsTab({ detail }: { detail: DayDetail }) {
+  const taken = detail.supplements.filter(s => s.taken_today);
+  const notTaken = detail.supplements.filter(s => !s.taken_today);
+  const compliance = detail.supplements.length > 0
+    ? Math.round((taken.length / detail.supplements.length) * 100)
+    : null;
+
+  return (
+    <div className="space-y-4">
+      {compliance !== null && (
+        <div className="rounded-lg bg-zinc-50 dark:bg-zinc-800/50 p-3 flex items-center gap-3">
+          <div className="flex-1">
+            <div className="flex justify-between text-xs text-zinc-500 dark:text-zinc-400 mb-1">
+              <span>Compliance</span>
+              <span>{taken.length}/{detail.supplements.length}</span>
+            </div>
+            <div className="h-2 rounded-full bg-zinc-200 dark:bg-zinc-700 overflow-hidden">
+              <div
+                className={`h-full rounded-full transition-all ${compliance >= 80 ? 'bg-green-500' : compliance >= 50 ? 'bg-yellow-500' : 'bg-red-500'}`}
+                style={{ width: `${compliance}%` }}
+              />
+            </div>
+          </div>
+          <span className="text-lg font-bold text-zinc-900 dark:text-zinc-100">{compliance}%</span>
+        </div>
+      )}
+
+      {detail.supplements.length === 0 && (
+        <p className="text-sm text-zinc-400 dark:text-zinc-500 text-center py-6">No active supplements.</p>
+      )}
+
+      {taken.length > 0 && (
+        <div>
+          <h3 className="text-xs font-semibold uppercase tracking-wide text-zinc-500 dark:text-zinc-400 mb-2">Taken</h3>
+          <div className="space-y-1.5">
+            {taken.map(s => (
+              <div key={s.id} className="flex items-center gap-2 rounded-md bg-green-50 dark:bg-green-900/20 px-3 py-2">
+                <CheckCircle2 size={15} className="text-green-500 shrink-0" />
+                <span className="text-sm text-zinc-900 dark:text-zinc-100">{s.name}</span>
+                <span className="text-xs text-zinc-500 dark:text-zinc-400 ml-auto">{s.dosage} {s.unit}</span>
+              </div>
+            ))}
+          </div>
+        </div>
+      )}
+
+      {notTaken.length > 0 && (
+        <div>
+          <h3 className="text-xs font-semibold uppercase tracking-wide text-zinc-500 dark:text-zinc-400 mb-2">Not Taken</h3>
+          <div className="space-y-1.5">
+            {notTaken.map(s => (
+              <div key={s.id} className="flex items-center gap-2 rounded-md bg-zinc-50 dark:bg-zinc-800/50 px-3 py-2">
+                <Circle size={15} className="text-zinc-400 shrink-0" />
+                <span className="text-sm text-zinc-500 dark:text-zinc-400">{s.name}</span>
+                <span className="text-xs text-zinc-400 ml-auto">{s.dosage} {s.unit}</span>
+              </div>
+            ))}
+          </div>
+        </div>
+      )}
+    </div>
+  );
+}
+
+// ── Notes Tab ─────────────────────────────────────────────────────────────────
+
+function NotesTab({ detail, onRefresh }: { detail: DayDetail; onRefresh: () => void }) {
+  const [content, setContent] = useState(detail.note?.content ?? '');
+  const [mood, setMood] = useState(detail.note?.mood ?? '');
+  const [energyLevel, setEnergyLevel] = useState(detail.note?.energy_level ?? 5);
+  const [saveStatus, setSaveStatus] = useState<'idle' | 'saving' | 'saved'>('idle');
+  const debounceRef = useRef<ReturnType<typeof setTimeout> | null>(null);
+
+  const save = useCallback(async (c: string, m: string, e: number) => {
+    setSaveStatus('saving');
+    try {
+      await upsertNote(detail.date, {
+        content: c,
+        mood: m || undefined,
+        energy_level: e,
+      });
+      setSaveStatus('saved');
+      onRefresh();
+    } catch {
+      setSaveStatus('idle');
+      toast.error('Failed to save note');
+    }
+  }, [detail.date, onRefresh]);
+
+  const scheduleAutosave = (c: string, m: string, e: number) => {
+    if (debounceRef.current) clearTimeout(debounceRef.current);
+    debounceRef.current = setTimeout(() => save(c, m, e), 1500);
+  };
+
+  useEffect(() => {
+    return () => {
+      if (debounceRef.current) clearTimeout(debounceRef.current);
+    };
+  }, []);
+
+  const handleContentChange = (val: string) => {
+    if (val.length > 10000) return;
+    setContent(val);
+    setSaveStatus('idle');
+    scheduleAutosave(val, mood, energyLevel);
+  };
+
+  const handleMoodChange = (val: string) => {
+    const newMood = mood === val ? '' : val;
+    setMood(newMood);
+    setSaveStatus('idle');
+    scheduleAutosave(content, newMood, energyLevel);
+  };
+
+  const handleEnergyChange = (val: number) => {
+    setEnergyLevel(val);
+    setSaveStatus('idle');
+    scheduleAutosave(content, mood, val);
+  };
+
+  return (
+    <div className="space-y-4">
+      <div>
+        <div className="flex items-center justify-between mb-1">
+          <label className="text-sm font-medium text-zinc-700 dark:text-zinc-300">Notes</label>
+          <span className="text-xs text-zinc-400">
+            {saveStatus === 'saving' && 'Saving...'}
+            {saveStatus === 'saved' && <span className="text-green-500">Saved</span>}
+            {saveStatus === 'idle' && `${content.length}/10000`}
+          </span>
+        </div>
+        <textarea
+          value={content}
+          onChange={e => handleContentChange(e.target.value)}
+          rows={6}
+          maxLength={10000}
+          className="w-full rounded-md border border-zinc-300 dark:border-zinc-600 bg-white dark:bg-zinc-800 px-3 py-2 text-sm text-zinc-900 dark:text-zinc-100 focus:outline-none focus:ring-2 focus:ring-primary resize-none"
+          placeholder="How did your day go? Any notes about your health, workouts, or wellbeing..."
+        />
+      </div>
+
+      <div>
+        <label className="text-sm font-medium text-zinc-700 dark:text-zinc-300 mb-2 block">Mood</label>
+        <div className="flex gap-2">
+          {MOOD_OPTIONS.map(opt => (
+            <button
+              key={opt.value}
+              type="button"
+              onClick={() => handleMoodChange(opt.value)}
+              className={`flex flex-col items-center gap-0.5 rounded-lg p-2 text-xs transition-colors border-2 ${
+                mood === opt.value
+                  ? 'border-primary bg-primary/10'
+                  : 'border-transparent hover:border-zinc-300 dark:hover:border-zinc-600'
+              }`}
+              title={opt.label}
+            >
+              <span className="text-xl">{opt.emoji}</span>
+              <span className="text-zinc-500 dark:text-zinc-400">{opt.label}</span>
+            </button>
+          ))}
+        </div>
+      </div>
+
+      <div>
+        <div className="flex items-center justify-between mb-2">
+          <label className="text-sm font-medium text-zinc-700 dark:text-zinc-300">Energy Level</label>
+          <span className="text-sm font-bold text-primary">{energyLevel}/10</span>
+        </div>
+        <input
+          type="range"
+          min={1}
+          max={10}
+          value={energyLevel}
+          onChange={e => handleEnergyChange(Number(e.target.value))}
+          className="w-full accent-primary"
+        />
+        <div className="flex justify-between text-xs text-zinc-400 mt-1">
+          <span>Low</span><span>High</span>
+        </div>
+      </div>
+    </div>
+  );
+}
+
+// ── DayModal ──────────────────────────────────────────────────────────────────
+
+type Tab = 'workout' | 'supplements' | 'notes';
+
+interface Props {
+  date: string;
+  detail: DayDetail | null;
+  loading: boolean;
+  onClose: () => void;
+  onRefresh: () => void;
+}
+
+export default function DayModal({ date, detail, loading, onClose, onRefresh }: Props) {
+  const [activeTab, setActiveTab] = useState<Tab>('notes');
+
+  const tabs: { id: Tab; label: string; icon: React.ReactNode }[] = [
+    { id: 'workout', label: 'Workout', icon: <Dumbbell size={15} /> },
+    { id: 'supplements', label: 'Supplements', icon: <Pill size={15} /> },
+    { id: 'notes', label: 'Notes', icon: <FileText size={15} /> },
+  ];
+
+  return (
+    <div className="fixed inset-0 z-50 flex items-end sm:items-center justify-center">
+      {/* Backdrop */}
+      <div className="absolute inset-0 bg-black/50" onClick={onClose} />
+
+      {/* Panel */}
+      <div className="relative z-10 w-full sm:max-w-lg sm:mx-4 bg-white dark:bg-zinc-900 rounded-t-2xl sm:rounded-2xl shadow-2xl max-h-[90vh] flex flex-col">
+        {/* Header */}
+        <div className="flex items-center justify-between px-5 py-4 border-b border-zinc-200 dark:border-zinc-800">
+          <h2 className="text-base font-semibold text-zinc-900 dark:text-zinc-100">
+            {formatDate(date)}
+          </h2>
+          <button
+            onClick={onClose}
+            className="text-zinc-500 hover:text-zinc-700 dark:hover:text-zinc-300 transition-colors rounded-md p-1"
+            aria-label="Close"
+          >
+            <X size={18} />
+          </button>
+        </div>
+
+        {/* Tabs */}
+        <div className="flex border-b border-zinc-200 dark:border-zinc-800 px-2">
+          {tabs.map(tab => (
+            <button
+              key={tab.id}
+              onClick={() => setActiveTab(tab.id)}
+              className={`flex items-center gap-1.5 px-4 py-3 text-sm font-medium border-b-2 transition-colors ${
+                activeTab === tab.id
+                  ? 'border-primary text-primary'
+                  : 'border-transparent text-zinc-500 dark:text-zinc-400 hover:text-zinc-700 dark:hover:text-zinc-300'
+              }`}
+            >
+              {tab.icon}
+              {tab.label}
+            </button>
+          ))}
+        </div>
+
+        {/* Content */}
+        <div className="flex-1 overflow-y-auto p-5">
+          {loading && (
+            <div className="flex items-center justify-center py-12">
+              <div className="animate-spin rounded-full h-8 w-8 border-b-2 border-primary" />
+            </div>
+          )}
+          {!loading && detail && (
+            <>
+              {activeTab === 'workout' && <WorkoutTab detail={detail} onRefresh={onRefresh} />}
+              {activeTab === 'supplements' && <SupplementsTab detail={detail} />}
+              {activeTab === 'notes' && <NotesTab detail={detail} onRefresh={onRefresh} />}
+            </>
+          )}
+          {!loading && !detail && (
+            <p className="text-sm text-zinc-400 text-center py-12">Failed to load day details.</p>
+          )}
+        </div>
+      </div>
+    </div>
+  );
+}

frontend/src/components/kettlebell/ElapsedTimer.tsx

@@ -0,0 +1,55 @@
+interface ElapsedTimerProps {
+    seconds: number;
+}
+
+export function ElapsedTimer({ seconds }: ElapsedTimerProps) {
+    const h = Math.floor(seconds / 3600);
+    const m = Math.floor((seconds % 3600) / 60);
+    const s = seconds % 60;
+    const pad = (n: number) => String(n).padStart(2, '0');
+    return (
+        <span className="font-mono tabular-nums">
+            {h > 0 ? `${pad(h)}:` : ''}{pad(m)}:{pad(s)}
+        </span>
+    );
+}
+
+export function ElapsedTimerCircle({ seconds }: ElapsedTimerProps) {
+    const h = Math.floor(seconds / 3600);
+    const m = Math.floor((seconds % 3600) / 60);
+    const s = seconds % 60;
+    const pad = (n: number) => String(n).padStart(2, '0');
+    const radius = 70;
+    const circumference = 2 * Math.PI * radius;
+
+    return (
+        <div className="flex items-center justify-center py-4">
+            <div className="relative w-48 h-48">
+                <svg className="w-full h-full -rotate-90" viewBox="0 0 160 160">
+                    <circle
+                        cx="80" cy="80" r={radius}
+                        fill="none"
+                        stroke="currentColor"
+                        strokeWidth="8"
+                        className="text-zinc-200 dark:text-zinc-700"
+                    />
+                    <circle
+                        cx="80" cy="80" r={radius}
+                        fill="none"
+                        stroke="currentColor"
+                        strokeWidth="8"
+                        strokeLinecap="round"
+                        strokeDasharray={circumference}
+                        strokeDashoffset={circumference * 0.25}
+                        className="text-primary"
+                    />
+                </svg>
+                <div className="absolute inset-0 flex items-center justify-center">
+                    <span className="text-4xl font-mono font-bold tabular-nums text-content">
+                        {h > 0 ? `${pad(h)}:` : ''}{pad(m)}:{pad(s)}
+                    </span>
+                </div>
+            </div>
+        </div>
+    );
+}

frontend/src/components/kettlebell/ProgressBar.tsx

@@ -0,0 +1,14 @@
+interface ProgressBarProps {
+    exerciseIdx: number;
+    totalExercises: number;
+    setIdx: number;
+    totalSets: number;
+}
+
+export function ProgressBar({ exerciseIdx, totalExercises, setIdx, totalSets }: ProgressBarProps) {
+    return (
+        <div className="text-sm text-content-muted text-center">
+            Exercise {exerciseIdx + 1}/{totalExercises} &nbsp;·&nbsp; Set {setIdx + 1}/{totalSets}
+        </div>
+    );
+}

frontend/src/components/kettlebell/RestCountdown.tsx

@@ -0,0 +1,46 @@
+interface RestCountdownProps {
+    remaining: number;
+    total: number;
+}
+
+export function RestCountdown({ remaining, total }: RestCountdownProps) {
+    const radius = 54;
+    const circumference = 2 * Math.PI * radius;
+    const progress = total > 0 ? remaining / total : 0;
+    const dashOffset = circumference * (1 - progress);
+
+    const m = Math.floor(remaining / 60);
+    const s = remaining % 60;
+    const pad = (n: number) => String(n).padStart(2, '0');
+
+    return (
+        <div className="flex items-center justify-center">
+            <div className="relative w-36 h-36">
+                <svg className="w-full h-full -rotate-90" viewBox="0 0 120 120">
+                    <circle
+                        cx="60" cy="60" r={radius}
+                        fill="none"
+                        stroke="currentColor"
+                        strokeWidth="8"
+                        className="text-zinc-200 dark:text-zinc-700"
+                    />
+                    <circle
+                        cx="60" cy="60" r={radius}
+                        fill="none"
+                        stroke="currentColor"
+                        strokeWidth="8"
+                        strokeLinecap="round"
+                        strokeDasharray={circumference}
+                        strokeDashoffset={dashOffset}
+                        className="text-primary transition-all duration-1000"
+                    />
+                </svg>
+                <div className="absolute inset-0 flex items-center justify-center">
+                    <span className="text-3xl font-mono font-bold tabular-nums text-content">
+                        {pad(m)}:{pad(s)}
+                    </span>
+                </div>
+            </div>
+        </div>
+    );
+}

frontend/src/components/kettlebell/SessionSummary.tsx

@@ -0,0 +1,36 @@
+import type { KettlebellSetLog } from '../../types/kettlebell';
+import { ElapsedTimer } from './ElapsedTimer';
+
+interface SessionSummaryProps {
+    totalElapsed: number;
+    logged: KettlebellSetLog[];
+}
+
+export function SessionSummary({ totalElapsed, logged }: SessionSummaryProps) {
+    const avgRpe = logged.length > 0
+        ? Math.round(logged.reduce((sum, s) => sum + s.perceived_effort, 0) / logged.length * 10) / 10
+        : 0;
+
+    return (
+        <div className="flex flex-col items-center gap-8 py-12 px-6">
+            <div className="text-6xl">🎉</div>
+            <h1 className="text-3xl font-bold text-content">Workout Complete!</h1>
+            <div className="grid grid-cols-3 gap-6 w-full max-w-sm">
+                <div className="bg-surface border border-border rounded-2xl p-4 text-center">
+                    <div className="text-2xl font-bold text-primary">
+                        <ElapsedTimer seconds={totalElapsed} />
+                    </div>
+                    <div className="text-xs text-content-muted mt-1">Total Time</div>
+                </div>
+                <div className="bg-surface border border-border rounded-2xl p-4 text-center">
+                    <div className="text-2xl font-bold text-primary">{logged.length}</div>
+                    <div className="text-xs text-content-muted mt-1">Sets Done</div>
+                </div>
+                <div className="bg-surface border border-border rounded-2xl p-4 text-center">
+                    <div className="text-2xl font-bold text-primary">{avgRpe}</div>
+                    <div className="text-xs text-content-muted mt-1">Avg RPE</div>
+                </div>
+            </div>
+        </div>
+    );
+}

frontend/src/components/kettlebell/SetLogger.tsx

@@ -0,0 +1,101 @@
+import type { ExerciseBlock } from '../../types/kettlebell';
+
+interface SetLoggerProps {
+    exercise: ExerciseBlock;
+    reps: number;
+    weightKg: number;
+    effort: number;
+    onRepsChange: (v: number) => void;
+    onWeightChange: (v: number) => void;
+    onEffortChange: (v: number) => void;
+    onComplete: () => void;
+}
+
+function Stepper({ label, value, onChange, step = 1, min = 0 }: {
+    label: string;
+    value: number;
+    onChange: (v: number) => void;
+    step?: number;
+    min?: number;
+}) {
+    return (
+        <div className="flex items-center justify-between gap-4">
+            <span className="text-content-muted w-24">{label}</span>
+            <div className="flex items-center gap-3">
+                <button
+                    type="button"
+                    onClick={() => onChange(Math.max(min, value - step))}
+                    className="w-10 h-10 rounded-full bg-surface border border-border text-xl font-bold text-content flex items-center justify-center active:scale-95"
+                >
+                    −
+                </button>
+                <span className="w-14 text-center text-xl font-bold text-content tabular-nums">
+                    {value}
+                </span>
+                <button
+                    type="button"
+                    onClick={() => onChange(value + step)}
+                    className="w-10 h-10 rounded-full bg-surface border border-border text-xl font-bold text-content flex items-center justify-center active:scale-95"
+                >
+                    +
+                </button>
+            </div>
+        </div>
+    );
+}
+
+function RpeDots({ value, onChange }: { value: number; onChange: (v: number) => void }) {
+    return (
+        <div className="flex items-center justify-between gap-4">
+            <span className="text-content-muted w-24">Effort</span>
+            <div className="flex items-center gap-1.5">
+                {Array.from({ length: 10 }, (_, i) => i + 1).map((dot) => (
+                    <button
+                        key={dot}
+                        type="button"
+                        onClick={() => onChange(dot)}
+                        className={`w-6 h-6 rounded-full transition-colors ${dot <= value
+                            ? 'bg-primary'
+                            : 'bg-zinc-200 dark:bg-zinc-700'
+                            }`}
+                        aria-label={`RPE ${dot}`}
+                    />
+                ))}
+                <span className="ml-2 text-sm text-content-muted tabular-nums">{value}/10</span>
+            </div>
+        </div>
+    );
+}
+
+export function SetLogger({
+    exercise,
+    reps,
+    weightKg,
+    effort,
+    onRepsChange,
+    onWeightChange,
+    onEffortChange,
+    onComplete,
+}: SetLoggerProps) {
+    const isTimed = exercise.reps === 0;
+
+    return (
+        <div className="flex flex-col gap-6 px-6 py-4">
+            {isTimed ? (
+                <Stepper label="Duration (s)" value={reps} onChange={onRepsChange} step={5} />
+            ) : (
+                <Stepper label="Reps done" value={reps} onChange={onRepsChange} />
+            )}
+            <Stepper label="Weight (kg)" value={weightKg} onChange={onWeightChange} step={0.5} />
+            <RpeDots value={effort} onChange={onEffortChange} />
+
+            <button
+                type="button"
+                onClick={onComplete}
+                className="w-full min-h-[72px] rounded-2xl bg-primary text-white text-xl font-bold active:scale-95 transition-transform mt-2"
+            >
+                COMPLETE SET
+            </button>
+        </div>
+    );
+}

frontend/src/pages/ActiveSession.tsx

@@ -0,0 +1,532 @@
+import { useEffect, useReducer, useCallback, useState } from 'react';
+import { useParams, useNavigate } from 'react-router-dom';
+import { getSession, getSets, startSession, logSet, completeSession, abandonSession } from '../api/kettlebell';
+import type { KettlebellSession, KettlebellSetLog, ExerciseBlock } from '../types/kettlebell';
+import { ElapsedTimer, ElapsedTimerCircle } from '../components/kettlebell/ElapsedTimer';
+import { RestCountdown } from '../components/kettlebell/RestCountdown';
+import { SetLogger } from '../components/kettlebell/SetLogger';
+import { ProgressBar } from '../components/kettlebell/ProgressBar';
+import { SessionSummary } from '../components/kettlebell/SessionSummary';
+import { ConfirmModal } from '../components/ConfirmModal';
+
+// --------------- State Machine ---------------
+
+interface LastSetStats {
+    duration: number;
+    restTaken: number | null;
+    reps: number;
+    weightKg: number;
+    effort: number;
+}
+
+type SessionPhase =
+    | { phase: 'loading' }
+    | { phase: 'planning'; session: KettlebellSession }
+    | { phase: 'active'; session: KettlebellSession; exerciseIdx: number; setIdx: number; elapsed: number; setElapsed: number; lastSetStats: LastSetStats | null; logged: KettlebellSetLog[]; reps: number; weightKg: number; effort: number }
+    | { phase: 'resting'; session: KettlebellSession; exerciseIdx: number; nextSetIdx: number; restRemaining: number; totalRest: number; elapsed: number; pendingSet: { duration: number; reps: number; weightKg: number; effort: number }; logged: KettlebellSetLog[] }
+    | { phase: 'complete'; session: KettlebellSession; totalElapsed: number; logged: KettlebellSetLog[] };
+
+type Action =
+    | { type: 'LOAD'; session: KettlebellSession; existingLogs: KettlebellSetLog[] }
+    | { type: 'START' }
+    | { type: 'TICK_ELAPSED' }
+    | { type: 'TICK_REST' }
+    | { type: 'SET_REPS'; value: number }
+    | { type: 'SET_WEIGHT'; value: number }
+    | { type: 'SET_EFFORT'; value: number }
+    | { type: 'COMPLETE_SET'; log: KettlebellSetLog }
+    | { type: 'SKIP_REST' }
+    | { type: 'FINISH' };
+
+function getExercises(session: KettlebellSession): ExerciseBlock[] {
+    return session.exercises?.exercises ?? [];
+}
+
+function initialSetValues(exercise: ExerciseBlock) {
+    return {
+        reps: exercise.reps > 0 ? exercise.reps : exercise.duration_seconds,
+        weightKg: exercise.weight_kg,
+        effort: 5,
+    };
+}
+
+function reducer(state: SessionPhase, action: Action): SessionPhase {
+    switch (action.type) {
+        case 'LOAD': {
+            const { session, existingLogs } = action;
+            if (session.status === 'completed') {
+                const elapsed = session.started_at && session.completed_at
+                    ? Math.round((new Date(session.completed_at).getTime() - new Date(session.started_at).getTime()) / 1000)
+                    : 0;
+                return { phase: 'complete', session, totalElapsed: elapsed, logged: existingLogs };
+            }
+            if (session.status === 'in_progress') {
+                const exercises = getExercises(session);
+                const elapsed = session.started_at
+                    ? Math.round((Date.now() - new Date(session.started_at).getTime()) / 1000)
+                    : 0;
+                // Rehydrate: find next incomplete set
+                let exerciseIdx = 0;
+                let setIdx = 0;
+                for (let ei = 0; ei < exercises.length; ei++) {
+                    for (let si = 0; si < exercises[ei].sets; si++) {
+                        const done = existingLogs.some(l => l.exercise_order === exercises[ei].order && l.set_number === si + 1);
+                        if (!done) {
+                            exerciseIdx = ei;
+                            setIdx = si;
+                            const ex = exercises[ei];
+                            return {
+                                phase: 'active', session, exerciseIdx, setIdx, elapsed, setElapsed: 0, lastSetStats: null, logged: existingLogs,
+                                ...initialSetValues(ex),
+                            };
+                        }
+                    }
+                }
+                // All sets done but session not completed
+                return { phase: 'complete', session, totalElapsed: elapsed, logged: existingLogs };
+            }
+            return { phase: 'planning', session };
+        }
+        case 'START': {
+            if (state.phase !== 'planning') return state;
+            const exercises = getExercises(state.session);
+            if (exercises.length === 0) return state;
+            const ex = exercises[0];
+            return {
+                phase: 'active',
+                session: { ...state.session, status: 'in_progress' },
+                exerciseIdx: 0,
+                setIdx: 0,
+                elapsed: 0,
+                setElapsed: 0,
+                lastSetStats: null,
+                logged: [],
+                ...initialSetValues(ex),
+            };
+        }
+        case 'TICK_ELAPSED': {
+            if (state.phase === 'active') return { ...state, elapsed: state.elapsed + 1, setElapsed: state.setElapsed + 1 };
+            if (state.phase === 'resting') return { ...state, elapsed: state.elapsed + 1 };
+            return state;
+        }
+        case 'TICK_REST': {
+            if (state.phase !== 'resting') return state;
+            if (state.restRemaining <= 1) {
+                // Auto-advance to next set
+                return advanceAfterRest(state);
+            }
+            return { ...state, restRemaining: state.restRemaining - 1 };
+        }
+        case 'SET_REPS': {
+            if (state.phase !== 'active') return state;
+            return { ...state, reps: action.value };
+        }
+        case 'SET_WEIGHT': {
+            if (state.phase !== 'active') return state;
+            return { ...state, weightKg: action.value };
+        }
+        case 'SET_EFFORT': {
+            if (state.phase !== 'active') return state;
+            return { ...state, effort: action.value };
+        }
+        case 'COMPLETE_SET': {
+            if (state.phase !== 'active') return state;
+            const newLogged = [...state.logged, action.log];
+            const exercises = getExercises(state.session);
+            const exercise = exercises[state.exerciseIdx];
+            const totalRest = exercise.rest_seconds;
+
+            // Check if there's a next set or exercise
+            const hasNextSet = state.setIdx + 1 < exercise.sets;
+            const hasNextExercise = state.exerciseIdx + 1 < exercises.length;
+
+            if (!hasNextSet && !hasNextExercise) {
+                // Last set of last exercise — go to complete
+                return {
+                    phase: 'complete',
+                    session: state.session,
+                    totalElapsed: state.elapsed,
+                    logged: newLogged,
+                };
+            }
+
+            const pendingSet = { duration: state.setElapsed, reps: state.reps, weightKg: state.weightKg, effort: state.effort };
+
+            if (totalRest > 0) {
+                return {
+                    phase: 'resting',
+                    session: state.session,
+                    exerciseIdx: state.exerciseIdx,
+                    nextSetIdx: state.setIdx + 1,
+                    restRemaining: totalRest,
+                    totalRest,
+                    elapsed: state.elapsed,
+                    pendingSet,
+                    logged: newLogged,
+                };
+            }
+            return advanceFromActive(state, newLogged, { ...pendingSet, restTaken: null });
+        }
+        case 'SKIP_REST': {
+            if (state.phase !== 'resting') return state;
+            return advanceAfterRest(state);
+        }
+        case 'FINISH':
+            return state;
+        default:
+            return state;
+    }
+}
+
+function advanceFromActive(state: Extract<SessionPhase, { phase: 'active' }>, newLogged: KettlebellSetLog[], lastSetStats: LastSetStats): SessionPhase {
+    const exercises = getExercises(state.session);
+    const exercise = exercises[state.exerciseIdx];
+    if (state.setIdx + 1 < exercise.sets) {
+        return { ...state, setIdx: state.setIdx + 1, setElapsed: 0, lastSetStats, logged: newLogged, ...initialSetValues(exercise) };
+    }
+    if (state.exerciseIdx + 1 < exercises.length) {
+        const nextEx = exercises[state.exerciseIdx + 1];
+        return { ...state, exerciseIdx: state.exerciseIdx + 1, setIdx: 0, setElapsed: 0, lastSetStats, logged: newLogged, ...initialSetValues(nextEx) };
+    }
+    return { phase: 'complete', session: state.session, totalElapsed: state.elapsed, logged: newLogged };
+}
+
+function advanceAfterRest(state: Extract<SessionPhase, { phase: 'resting' }>): SessionPhase {
+    const exercises = getExercises(state.session);
+    const exercise = exercises[state.exerciseIdx];
+    const restTaken = state.totalRest - state.restRemaining;
+    const lastSetStats: LastSetStats = { ...state.pendingSet, restTaken };
+    if (state.nextSetIdx < exercise.sets) {
+        return {
+            phase: 'active',
+            session: state.session,
+            exerciseIdx: state.exerciseIdx,
+            setIdx: state.nextSetIdx,
+            elapsed: state.elapsed,
+            setElapsed: 0,
+            lastSetStats,
+            logged: state.logged,
+            ...initialSetValues(exercise),
+        };
+    }
+    if (state.exerciseIdx + 1 < exercises.length) {
+        const nextEx = exercises[state.exerciseIdx + 1];
+        return {
+            phase: 'active',
+            session: state.session,
+            exerciseIdx: state.exerciseIdx + 1,
+            setIdx: 0,
+            elapsed: state.elapsed,
+            setElapsed: 0,
+            lastSetStats,
+            logged: state.logged,
+            ...initialSetValues(nextEx),
+        };
+    }
+    return { phase: 'complete', session: state.session, totalElapsed: state.elapsed, logged: state.logged };
+}
+
+// --------------- Component ---------------
+
+export default function ActiveSession() {
+    const { id } = useParams<{ id: string }>();
+    const navigate = useNavigate();
+    const [state, dispatch] = useReducer(reducer, { phase: 'loading' });
+
+    // Load session on mount
+    useEffect(() => {
+        if (!id) return;
+        Promise.all([getSession(Number(id)), getSets(Number(id))])
+            .then(([session, logs]) => dispatch({ type: 'LOAD', session, existingLogs: logs }))
+            .catch(() => navigate('/kettlebell'));
+    }, [id, navigate]);
+
+    // Elapsed timer
+    useEffect(() => {
+        if (state.phase !== 'active' && state.phase !== 'resting') return;
+        const interval = setInterval(() => dispatch({ type: 'TICK_ELAPSED' }), 1000);
+        return () => clearInterval(interval);
+    }, [state.phase]);
+
+    // Rest countdown
+    useEffect(() => {
+        if (state.phase !== 'resting') return;
+        const interval = setInterval(() => dispatch({ type: 'TICK_REST' }), 1000);
+        return () => clearInterval(interval);
+    }, [state.phase]);
+
+    // Start session on server
+    const handleStart = useCallback(async () => {
+        if (!id || state.phase !== 'planning') return;
+        await startSession(Number(id));
+        dispatch({ type: 'START' });
+    }, [id, state.phase]);
+
+    // Complete set: log to server, then advance
+    const handleCompleteSet = useCallback(async () => {
+        if (state.phase !== 'active' || !id) return;
+        const exercises = getExercises(state.session);
+        const exercise = exercises[state.exerciseIdx];
+        const isTimed = exercise.reps === 0;
+        try {
+            const log = await logSet(Number(id), {
+                exercise_order: exercise.order,
+                set_number: state.setIdx + 1,
+                actual_reps: isTimed ? 0 : state.reps,
+                actual_weight_kg: state.weightKg,
+                actual_duration_seconds: isTimed ? state.reps : 0,
+                perceived_effort: state.effort,
+            });
+            dispatch({ type: 'COMPLETE_SET', log });
+
+            // Check if this was the last set of last exercise
+            const hasNextSet = state.setIdx + 1 < exercise.sets;
+            const hasNextExercise = state.exerciseIdx + 1 < exercises.length;
+            if (!hasNextSet && !hasNextExercise) {
+                await completeSession(Number(id));
+            }
+        } catch (err) {
+            console.error('Failed to log set', err);
+            alert('Failed to log set. Please try again.');
+        }
+    }, [id, state]);
+
+    const [showAbandonModal, setShowAbandonModal] = useState(false);
+
+    const handleAbandon = useCallback(async () => {
+        if (!id) return;
+        try {
+            await abandonSession(Number(id));
+            navigate('/kettlebell');
+        } catch (err) {
+            console.error('Failed to abandon session', err);
+        }
+    }, [id, navigate]);
+
+    if (state.phase === 'loading') {
+        return (
+            <div className="min-h-screen bg-base flex items-center justify-center">
+                <p className="text-content-muted">Loading session...</p>
+            </div>
+        );
+    }
+
+    if (state.phase === 'planning') {
+        const exercises = getExercises(state.session);
+        return (
+            <div className="min-h-screen bg-base flex flex-col">
+                <div className="flex items-center gap-4 px-4 py-4 border-b border-border">
+                    <button onClick={() => navigate('/kettlebell')} className="text-content-muted hover:text-content">
+                        ← Back
+                    </button>
+                    <h1 className="font-bold text-content flex-1 truncate">{state.session.title}</h1>
+                </div>
+                <div className="flex-1 overflow-y-auto px-4 py-6 space-y-4">
+                    <p className="text-content-muted text-sm capitalize">
+                        {state.session.focus} · {state.session.difficulty} · {state.session.total_duration_min} min
+                    </p>
+                    {exercises.map((ex, i) => (
+                        <div key={i} className="bg-surface border border-border rounded-xl p-4">
+                            <div className="flex items-start justify-between">
+                                <div>
+                                    <p className="font-bold text-content">{ex.order}. {ex.name}</p>
+                                    <p className="text-sm text-content-muted">{ex.description}</p>
+                                </div>
+                                <div className="text-sm text-content-muted text-right ml-4 shrink-0">
+                                    <p>{ex.sets} × {ex.reps > 0 ? `${ex.reps} reps` : `${ex.duration_seconds}s`}</p>
+                                    <p>{ex.weight_kg} kg</p>
+                                </div>
+                            </div>
+                            <p className="text-xs text-primary mt-2 italic">"{ex.coaching_tip}"</p>
+                        </div>
+                    ))}
+                </div>
+                <div className="px-4 pb-8 pt-4 border-t border-border">
+                    <button
+                        onClick={handleStart}
+                        className="w-full min-h-[72px] rounded-2xl bg-primary text-white text-xl font-bold active:scale-95 transition-transform"
+                    >
+                        START WORKOUT
+                    </button>
+                </div>
+            </div>
+        );
+    }
+
+    if (state.phase === 'active') {
+        const exercises = getExercises(state.session);
+        const exercise = exercises[state.exerciseIdx];
+        return (
+            <div className="min-h-screen bg-base flex flex-col">
+                {showAbandonModal && (
+                    <ConfirmModal
+                        title="Cancel Session"
+                        message="Cancel this session? Progress logged so far will be saved but the session will be marked as abandoned."
+                        confirmLabel="Cancel Session"
+                        destructive
+                        onConfirm={handleAbandon}
+                        onCancel={() => setShowAbandonModal(false)}
+                    />
+                )}
+
+                {/* Sticky top bar */}
+                <div className="flex items-center justify-between px-4 py-3 border-b border-border bg-surface sticky top-0 z-10">
+                    <button onClick={() => navigate('/kettlebell')} className="text-content-muted hover:text-content text-sm">
+                        ← Back
+                    </button>
+                    <ProgressBar
+                        exerciseIdx={state.exerciseIdx}
+                        totalExercises={exercises.length}
+                        setIdx={state.setIdx}
+                        totalSets={exercise.sets}
+                    />
+                </div>
+
+                {/* Exercise info */}
+                <div className="px-6 py-6 border-b border-border">
+                    <h2 className="text-2xl font-bold text-content uppercase">{exercise.name}</h2>
+                    <p className="text-content-muted mt-1">
+                        Set {state.setIdx + 1} of {exercise.sets} · {exercise.weight_kg} kg · {exercise.reps > 0 ? `${exercise.reps} reps` : `${exercise.duration_seconds}s`}
+                    </p>
+                    <p className="text-sm text-primary italic mt-2">"{exercise.coaching_tip}"</p>
+                </div>
+
+                {/* Timer row: last set card | current set circle | total */}
+                <div className="flex items-center justify-between px-4 py-4 gap-3">
+                    {/* Last set card */}
+                    <div className="flex-1 flex flex-col gap-1.5">
+                        <span className="text-xs font-semibold uppercase tracking-wide text-emerald-400">Last Set</span>
+                        <span className="text-xl font-mono font-bold tabular-nums text-content">
+                            {state.lastSetStats !== null
+                                ? <ElapsedTimer seconds={state.lastSetStats.duration} />
+                                : <span className="text-content-muted text-base">—</span>}
+                        </span>
+                        {state.lastSetStats !== null && (
+                            <div className="bg-surface border border-border rounded-xl px-2.5 py-2 flex flex-col gap-1">
+                                {state.lastSetStats.restTaken !== null && (
+                                    <div className="flex justify-between text-xs">
+                                        <span className="text-content-muted">Rest</span>
+                                        <span className="text-content font-medium tabular-nums"><ElapsedTimer seconds={state.lastSetStats.restTaken} /></span>
+                                    </div>
+                                )}
+                                <div className="flex justify-between text-xs">
+                                    <span className="text-content-muted">Reps</span>
+                                    <span className="text-content font-medium">{state.lastSetStats.reps}</span>
+                                </div>
+                                <div className="flex justify-between text-xs">
+                                    <span className="text-content-muted">Weight</span>
+                                    <span className="text-content font-medium">{state.lastSetStats.weightKg} kg</span>
+                                </div>
+                                <div className="flex justify-between text-xs">
+                                    <span className="text-content-muted">Effort</span>
+                                    <span className="text-content font-medium">{state.lastSetStats.effort}/10</span>
+                                </div>
+                            </div>
+                        )}
+                    </div>
+
+                    <ElapsedTimerCircle seconds={state.setElapsed} />
+
+                    {/* Total */}
+                    <div className="flex-1 flex flex-col items-end gap-1.5">
+                        <span className="text-xs font-semibold uppercase tracking-wide text-amber-400">Total</span>
+                        <span className="text-xl font-mono font-bold tabular-nums text-content">
+                            <ElapsedTimer seconds={state.elapsed} />
+                        </span>
+                    </div>
+                </div>
+
+                {/* Set logger */}
+                <div className="flex-1">
+                    <SetLogger
+                        exercise={exercise}
+                        reps={state.reps}
+                        weightKg={state.weightKg}
+                        effort={state.effort}
+                        onRepsChange={value => dispatch({ type: 'SET_REPS', value })}
+                        onWeightChange={value => dispatch({ type: 'SET_WEIGHT', value })}
+                        onEffortChange={value => dispatch({ type: 'SET_EFFORT', value })}
+                        onComplete={handleCompleteSet}
+                    />
+                </div>
+
+                {/* Cancel session */}
+                <div className="px-6 pb-6 flex justify-center">
+                    <button
+                        onClick={() => setShowAbandonModal(true)}
+                        className="text-sm text-content-muted hover:text-red-500 transition-colors"
+                    >
+                        Cancel Session
+                    </button>
+                </div>
+            </div>
+        );
+    }
+
+    if (state.phase === 'resting') {
+        const exercises = getExercises(state.session);
+        const exercise = exercises[state.exerciseIdx];
+        const isLastSet = state.nextSetIdx >= exercise.sets;
+        const nextExercise = isLastSet ? exercises[state.exerciseIdx + 1] : null;
+        const nextLabel = isLastSet && nextExercise
+            ? `Next: ${nextExercise.name} · Set 1/${nextExercise.sets} · ${nextExercise.weight_kg}kg`
+            : `Next: Set ${state.nextSetIdx + 1}/${exercise.sets} · ${exercise.name} · ${exercise.weight_kg}kg`;
+
+        return (
+            <div className="min-h-screen bg-base flex flex-col items-center justify-center gap-8 px-6">
+                {showAbandonModal && (
+                    <ConfirmModal
+                        title="Cancel Session"
+                        message="Cancel this session? Progress logged so far will be saved but the session will be marked as abandoned."
+                        confirmLabel="Cancel Session"
+                        destructive
+                        onConfirm={handleAbandon}
+                        onCancel={() => setShowAbandonModal(false)}
+                    />
+                )}
+
+                <div className="flex items-center justify-between w-full max-w-sm">
+                    <button onClick={() => navigate('/kettlebell')} className="text-content-muted hover:text-content text-sm">
+                        ← Back
+                    </button>
+                    <div className="text-lg font-mono font-bold text-content">
+                        <ElapsedTimer seconds={state.elapsed} />
+                    </div>
+                </div>
+
+                <h2 className="text-3xl font-bold text-content">REST</h2>
+                <RestCountdown remaining={state.restRemaining} total={state.totalRest} />
+                <p className="text-content-muted text-sm text-center">{nextLabel}</p>
+
+                <button
+                    onClick={() => dispatch({ type: 'SKIP_REST' })}
+                    className="px-8 py-3 rounded-xl border border-border text-content hover:bg-surface transition-colors"
+                >
+                    SKIP REST
+                </button>
+
+                <button
+                    onClick={() => setShowAbandonModal(true)}
+                    className="text-sm text-content-muted hover:text-red-500 transition-colors"
+                >
+                    Cancel Session
+                </button>
+            </div>
+        );
+    }
+
+    if (state.phase === 'complete') {
+        return (
+            <div className="min-h-screen bg-base flex flex-col">
+                <div className="flex items-center gap-4 px-4 py-4 border-b border-border">
+                    <button onClick={() => navigate('/kettlebell')} className="text-content-muted hover:text-content">
+                        ← Back to Kettlebell
+                    </button>
+                </div>
+                <SessionSummary totalElapsed={state.totalElapsed} logged={state.logged} />
+            </div>
+        );
+    }
+
+    return null;
+}

frontend/src/pages/Calendar.tsx

@@ -0,0 +1,251 @@
+import { useState, useEffect, useCallback } from 'react';
+import { DayPicker } from 'react-day-picker';
+import 'react-day-picker/style.css';
+import { CalendarDays, Dumbbell, Pill, FileText, ChevronLeft, ChevronRight, Plus } from 'lucide-react';
+import { toast } from 'sonner';
+import type { DayMeta, DayDetail } from '../types/calendar';
+import { getMonthSummary, getDayDetail } from '../api/calendar';
+import DayModal from '../components/calendar/DayModal';
+
+function pad(n: number) { return String(n).padStart(2, '0'); }
+function toDateStr(d: Date): string {
+  return `${d.getFullYear()}-${pad(d.getMonth() + 1)}-${pad(d.getDate())}`;
+}
+
+function MonthStats({ meta }: { meta: DayMeta[] }) {
+  const workoutDays = meta.filter(d => d.has_workout).length;
+  const noteDays = meta.filter(d => d.has_note).length;
+  const daysWithSupp = meta.filter(d => d.supplement_compliance !== null);
+  const avgCompliance = daysWithSupp.length > 0
+    ? Math.round(daysWithSupp.reduce((a, d) => a + (d.supplement_compliance ?? 0), 0) / daysWithSupp.length * 100)
+    : null;
+
+  const stats = [
+    { icon: <Dumbbell size={16} />, label: 'Workout Days', value: workoutDays, color: 'text-green-600 dark:text-green-400' },
+    { icon: <Pill size={16} />, label: 'Avg Compliance', value: avgCompliance !== null ? `${avgCompliance}%` : '—', color: 'text-blue-600 dark:text-blue-400' },
+    { icon: <FileText size={16} />, label: 'Days with Notes', value: noteDays, color: 'text-yellow-600 dark:text-yellow-400' },
+  ];
+
+  return (
+    <div className="grid grid-cols-3 gap-3 mb-6">
+      {stats.map(s => (
+        <div key={s.label} className="bg-surface rounded-xl border border-border p-3 flex flex-col items-center gap-1">
+          <span className={s.color}>{s.icon}</span>
+          <span className="text-lg font-bold text-zinc-900 dark:text-zinc-100">{s.value}</span>
+          <span className="text-xs text-zinc-500 dark:text-zinc-400 text-center leading-tight">{s.label}</span>
+        </div>
+      ))}
+    </div>
+  );
+}
+
+export default function Calendar() {
+  const [month, setMonth] = useState(() => new Date());
+  const [monthMeta, setMonthMeta] = useState<DayMeta[]>([]);
+  const [metaLoading, setMetaLoading] = useState(false);
+  const [selectedDate, setSelectedDate] = useState<string | null>(null);
+  const [dayDetail, setDayDetail] = useState<DayDetail | null>(null);
+  const [detailLoading, setDetailLoading] = useState(false);
+
+  const metaByDate = Object.fromEntries(monthMeta.map(m => [m.date, m]));
+
+  const fetchMonth = useCallback(async (m: Date) => {
+    setMetaLoading(true);
+    try {
+      const data = await getMonthSummary(m.getFullYear(), m.getMonth() + 1);
+      setMonthMeta(data);
+    } catch {
+      toast.error('Failed to load calendar data');
+    } finally {
+      setMetaLoading(false);
+    }
+  }, []);
+
+  useEffect(() => {
+    fetchMonth(month);
+  }, [month, fetchMonth]);
+
+  const openDay = async (date: string) => {
+    setSelectedDate(date);
+    setDayDetail(null);
+    setDetailLoading(true);
+    try {
+      const data = await getDayDetail(date);
+      setDayDetail(data);
+    } catch {
+      toast.error('Failed to load day details');
+    } finally {
+      setDetailLoading(false);
+    }
+  };
+
+  const handleDayClick = (day: Date) => {
+    openDay(toDateStr(day));
+  };
+
+  const handleModalClose = () => {
+    setSelectedDate(null);
+    setDayDetail(null);
+  };
+
+  const handleRefresh = () => {
+    if (selectedDate) openDay(selectedDate);
+    fetchMonth(month);
+  };
+
+  // Build modifiers from monthMeta
+  const workoutDates = monthMeta.filter(d => d.has_workout).map(d => new Date(d.date + 'T00:00:00'));
+  const suppGoodDates = monthMeta
+    .filter(d => d.supplement_compliance !== null && d.supplement_compliance >= 0.8)
+    .map(d => new Date(d.date + 'T00:00:00'));
+  const noteDates = monthMeta.filter(d => d.has_note).map(d => new Date(d.date + 'T00:00:00'));
+  const calorieDates = monthMeta.filter(d => d.calorie_total && d.calorie_total > 0).map(d => new Date(d.date + 'T00:00:00'));
+
+  return (
+    <div className="w-full animate-fade-in">
+      <div className="flex items-center justify-between mb-6">
+        <div>
+          <h1 className="text-2xl font-bold text-zinc-900 dark:text-zinc-100 flex items-center gap-2">
+            <CalendarDays size={24} className="text-primary" /> Calendar
+          </h1>
+          <p className="text-sm text-zinc-500 dark:text-zinc-400 mt-0.5">Track your health journey day by day.</p>
+        </div>
+      </div>
+
+      <MonthStats meta={monthMeta} />
+
+      <div className="bg-surface rounded-2xl border border-border shadow-sm p-4 sm:p-6">
+        {metaLoading && (
+          <div className="flex items-center justify-center py-4">
+            <div className="animate-spin rounded-full h-6 w-6 border-b-2 border-primary" />
+          </div>
+        )}
+
+        <DayPicker
+          mode="single"
+          month={month}
+          onMonthChange={setMonth}
+          onDayClick={handleDayClick}
+          modifiers={{
+            hasWorkout: workoutDates,
+            suppGood: suppGoodDates,
+            hasNote: noteDates,
+            hasCalories: calorieDates,
+          }}
+          modifiersClassNames={{
+            hasWorkout: 'rdp-cal-workout',
+            suppGood: 'rdp-cal-supp',
+            hasNote: 'rdp-cal-note',
+            hasCalories: 'rdp-cal-calories',
+          }}
+          classNames={{
+            root: 'rdp-cal-root w-full',
+            months: 'w-full',
+            month: 'w-full',
+            month_grid: 'w-full',
+            month_caption: 'text-zinc-900 dark:text-zinc-100 font-semibold text-xl mb-4',
+            nav: 'text-zinc-500 dark:text-zinc-400',
+            day: 'rdp-cal-day text-zinc-900 dark:text-zinc-100 hover:bg-primary/10 rounded-xl transition-colors cursor-pointer relative',
+            selected: '!bg-primary !text-white rounded-xl',
+            today: 'font-bold text-primary',
+            outside: 'opacity-30',
+            weekday: 'text-zinc-500 dark:text-zinc-400 text-sm font-medium',
+          }}
+        />
+
+        {/* Legend */}
+        <div className="flex flex-wrap gap-4 mt-4 pt-4 border-t border-border">
+          <div className="flex items-center gap-1.5 text-xs text-zinc-500 dark:text-zinc-400">
+            <span className="w-2.5 h-2.5 rounded-full bg-green-500 inline-block" />
+            Workout
+          </div>
+          <div className="flex items-center gap-1.5 text-xs text-zinc-500 dark:text-zinc-400">
+            <span className="w-2.5 h-2.5 rounded-full bg-blue-500 inline-block" />
+            Supplements ≥80%
+          </div>
+          <div className="flex items-center gap-1.5 text-xs text-zinc-500 dark:text-zinc-400">
+            <span className="w-2.5 h-2.5 rounded-full bg-yellow-400 inline-block" />
+            Note
+          </div>
+        </div>
+      </div>
+
+      <style>{`
+        /* Make the grid fill the full container width */
+        .rdp-cal-root,
+        .rdp-cal-root .rdp-months,
+        .rdp-cal-root .rdp-month,
+        .rdp-cal-root .rdp-month_grid {
+          width: 100% !important;
+          max-width: 100% !important;
+        }
+
+        /* Table layout: fixed forces equal column distribution */
+        .rdp-cal-root .rdp-month_grid {
+          table-layout: fixed !important;
+          border-collapse: collapse;
+        }
+
+        /* Equal-width columns */
+        .rdp-cal-root .rdp-weekday,
+        .rdp-cal-root .rdp-day {
+          width: calc(100% / 7);
+          text-align: center;
+          padding: 2px;
+        }
+
+        /* Day button fills the cell, square aspect ratio */
+        .rdp-cal-root .rdp-day_button {
+          width: 100% !important;
+          height: auto !important;
+          aspect-ratio: 1 / 1;
+          max-width: none !important;
+          max-height: none !important;
+          font-size: 1.05rem;
+          border-radius: 0.75rem;
+          display: flex;
+          align-items: center;
+          justify-content: center;
+        }
+
+        /* Weekday header font */
+        .rdp-cal-root .rdp-weekday {
+          font-size: 0.875rem;
+          padding-bottom: 0.5rem;
+        }
+
+        /* Indicator dots sit on the button itself */
+        .rdp-cal-workout .rdp-day_button,
+        .rdp-cal-supp .rdp-day_button,
+        .rdp-cal-note .rdp-day_button {
+          position: relative;
+        }
+        .rdp-cal-workout .rdp-day_button::after,
+        .rdp-cal-supp .rdp-day_button::after,
+        .rdp-cal-note .rdp-day_button::after {
+          content: '';
+          position: absolute;
+          bottom: 4px;
+          left: 50%;
+          transform: translateX(-50%);
+          width: 5px;
+          height: 5px;
+          border-radius: 50%;
+        }
+        .rdp-cal-workout .rdp-day_button::after { background: #22c55e; }
+        .rdp-cal-supp .rdp-day_button::after { background: #3b82f6; left: calc(50% + 8px); }
+        .rdp-cal-note .rdp-day_button::after { background: #facc15; left: calc(50% - 8px); }
+      `}</style>
+
+      {selectedDate && (
+        <DayModal
+          date={selectedDate}
+          detail={dayDetail}
+          loading={detailLoading}
+          onClose={handleModalClose}
+          onRefresh={handleRefresh}
+        />
+      )}
+    </div>
+  );
+}

frontend/src/pages/Dashboard.tsx

@@ -1,25 +1,32 @@
-import React, { useEffect, useState } from 'react';
+import { useEffect, useState } from 'react';
 import client from '../api/client';
 import {
     AreaChart, Area, XAxis, YAxis, CartesianGrid, Tooltip, ResponsiveContainer,
-    BarChart, Bar, PieChart, Pie, Cell, Legend
+    PieChart, Pie, Cell, Legend
 } from 'recharts';
 import { Activity, Flame, Footprints, Scale, Utensils } from 'lucide-react';
+import type { FoodLog } from '../types/nutrition';
+import type { HealthMetric } from '../types/health';
+import type { NutritionSummary } from '../types/nutrition';
+import { getNutritionSummary } from '../api/nutrition';
 
 const Dashboard = () => {
     const [loading, setLoading] = useState(true);
-    const [metrics, setMetrics] = useState([]);
+    const [metrics, setMetrics] = useState<HealthMetric[]>([]);
-    const [logs, setLogs] = useState([]);
+    const [logs, setLogs] = useState<FoodLog[]>([]);
+    const [summary, setSummary] = useState<NutritionSummary | null>(null);
 
     useEffect(() => {
         const loadData = async () => {
             try {
-                const [metricsRes, logsRes] = await Promise.all([
+                const [metricsRes, logsRes, summaryData] = await Promise.all([
                     client.get('/health/metrics'),
-                    client.get('/nutrition/logs')
+                    client.get('/nutrition/logs'),
+                    getNutritionSummary(),
                 ]);
                 setMetrics(metricsRes.data);
                 setLogs(logsRes.data);
+                setSummary(summaryData);
             } catch (error) {
                 console.error("Failed to load dashboard data", error);
             } finally {
@@ -171,7 +178,7 @@ const Dashboard = () => {
                                         paddingAngle={5}
                                         dataKey="value"
                                     >
-                                        {activeMacroData.map((entry, index) => (
+                                        {activeMacroData.map((_entry, index) => (
                                             <Cell key={`cell-${index}`} fill={COLORS[index % COLORS.length]} />
                                         ))}
                                     </Pie>
@@ -191,6 +198,41 @@ const Dashboard = () => {
                 </div>
             </div>
 
+            {/* Macro Targets Progress */}
+            {summary && (summary.target_calories || summary.target_protein || summary.target_carbs || summary.target_fat) && (
+                <div className="bg-surface p-6 rounded-2xl border border-border shadow-sm">
+                    <h3 className="text-lg font-semibold text-content mb-6 flex items-center gap-2">
+                        <Flame size={18} className="text-primary" />
+                        Today's Macro Targets
+                    </h3>
+                    <div className="grid grid-cols-1 md:grid-cols-2 gap-6">
+                        {[
+                            { label: 'Calories', current: Math.round(summary.total_calories), target: summary.target_calories, unit: 'kcal', color: 'bg-orange-500' },
+                            { label: 'Protein', current: Math.round(summary.total_protein), target: summary.target_protein, unit: 'g', color: 'bg-red-500' },
+                            { label: 'Carbs', current: Math.round(summary.total_carbs), target: summary.target_carbs, unit: 'g', color: 'bg-amber-500' },
+                            { label: 'Fat', current: Math.round(summary.total_fats), target: summary.target_fat, unit: 'g', color: 'bg-blue-500' },
+                        ].filter(m => m.target).map(macro => {
+                            const pct = Math.min(100, Math.round(((macro.current) / (macro.target!)) * 100));
+                            return (
+                                <div key={macro.label}>
+                                    <div className="flex justify-between text-sm mb-1">
+                                        <span className="font-medium text-content">{macro.label}</span>
+                                        <span className="text-content-muted">{macro.current} / {macro.target} {macro.unit}</span>
+                                    </div>
+                                    <div className="w-full bg-base rounded-full h-2.5 overflow-hidden border border-border">
+                                        <div
+                                            className={`h-full rounded-full ${macro.color} transition-all duration-500`}
+                                            style={{ width: `${pct}%` }}
+                                        />
+                                    </div>
+                                    <p className="text-xs text-content-muted mt-1">{pct}%</p>
+                                </div>
+                            );
+                        })}
+                    </div>
+                </div>
+            )}
+
             {/* Recent Activity */}
             <div className="bg-surface p-6 rounded-2xl border border-border shadow-sm">
                 <h3 className="text-lg font-semibold text-content mb-4">Recent Food Logs</h3>

frontend/src/pages/Health.tsx

@@ -1,7 +1,8 @@
-import { useState, useEffect, useMemo, FormEvent, ChangeEvent } from 'react';
+import { useState, useEffect, useMemo, FormEvent } from 'react';
+import { toast } from 'sonner';
 import client from '../api/client';
 import { LineChart, Line, XAxis, YAxis, CartesianGrid, Tooltip, ResponsiveContainer } from 'recharts';
-import { Field, Label, Fieldset, Legend } from '../components/catalyst/fieldset';
+import { Field, Label } from '../components/catalyst/fieldset';
 import { Input } from '../components/catalyst/input';
 import { Select } from '../components/catalyst/select';
 import { Button } from '../components/catalyst/button';
@@ -56,7 +57,7 @@ const Health = () => {
             fetchData();
         } catch (error) {
             console.error(error);
-            alert('Failed to add metric');
+            toast.error('Failed to add metric');
         } finally {
             setLoading(false);
         }
@@ -74,7 +75,7 @@ const Health = () => {
             fetchData();
         } catch (error) {
             console.error(error);
-            alert('Failed to add goal');
+            toast.error('Failed to add goal');
         } finally {
             setLoading(false);
         }

frontend/src/pages/Kettlebell.tsx

@@ -0,0 +1,270 @@
+import { useState, useEffect, FormEvent } from 'react';
+import { useNavigate } from 'react-router-dom';
+import { toast } from 'sonner';
+import { generateSession, getSessions, deleteSession, retrySession } from '../api/kettlebell';
+import type { KettlebellSession } from '../types/kettlebell';
+import { Heading, Subheading } from '../components/catalyst/heading';
+import { Button } from '../components/catalyst/button';
+import { Field, Label } from '../components/catalyst/fieldset';
+import { Input } from '../components/catalyst/input';
+import { ConfirmModal } from '../components/ConfirmModal';
+import { BarChart2 } from 'lucide-react';
+
+const FOCUS_OPTIONS = ['strength', 'conditioning', 'fat loss', 'mobility', 'endurance'];
+const DURATION_OPTIONS = [20, 30, 45, 60];
+
+const statusColors: Record<string, string> = {
+    generated: 'bg-zinc-100 text-zinc-600 dark:bg-zinc-800 dark:text-zinc-300',
+    in_progress: 'bg-blue-100 text-blue-700 dark:bg-blue-900 dark:text-blue-200',
+    completed: 'bg-green-100 text-green-700 dark:bg-green-900 dark:text-green-200',
+    abandoned: 'bg-red-100 text-red-600 dark:bg-red-900 dark:text-red-300',
+};
+
+export default function Kettlebell() {
+    const navigate = useNavigate();
+    const [sessions, setSessions] = useState<KettlebellSession[]>([]);
+    const [selected, setSelected] = useState<KettlebellSession | null>(null);
+    const [loading, setLoading] = useState(false);
+    const [deleteTarget, setDeleteTarget] = useState<KettlebellSession | null>(null);
+
+    const [focus, setFocus] = useState('strength');
+    const [duration, setDuration] = useState(30);
+    const [weightsInput, setWeightsInput] = useState('16, 24, 32');
+
+    useEffect(() => {
+        getSessions().then(data => {
+            setSessions(data);
+            if (data.length > 0) setSelected(data[0]);
+        }).catch(console.error);
+    }, []);
+
+    const handleRetry = async (id: number) => {
+        try {
+            const newSession = await retrySession(id);
+            setSessions(prev => [newSession, ...prev]);
+            setSelected(newSession);
+            navigate(`/kettlebell/session/${newSession.id}`);
+        } catch {
+            toast.error('Failed to create retry session.');
+        }
+    };
+
+    const handleDeleteConfirm = async () => {
+        if (!deleteTarget) return;
+        const id = deleteTarget.id;
+        setDeleteTarget(null);
+        try {
+            await deleteSession(id);
+            setSessions(prev => prev.filter(s => s.id !== id));
+            if (selected?.id === id) setSelected(null);
+        } catch {
+            // silently ignore — could add toast here in future
+        }
+    };
+
+    const handleGenerate = async (e: FormEvent) => {
+        e.preventDefault();
+        setLoading(true);
+        try {
+            const available_weights = weightsInput
+                .split(',')
+                .map(s => parseFloat(s.trim()))
+                .filter(n => !isNaN(n) && n > 0);
+            const session = await generateSession({ focus, duration_minutes: duration, available_weights });
+            setSessions(prev => [session, ...prev]);
+            setSelected(session);
+        } catch {
+            toast.error('Failed to generate session');
+        } finally {
+            setLoading(false);
+        }
+    };
+
+    const exercises = selected?.exercises?.exercises ?? [];
+
+    return (
+        <div className="max-w-7xl mx-auto space-y-6">
+            {deleteTarget && (
+                <ConfirmModal
+                    title="Delete Session"
+                    message={`Delete "${deleteTarget.title}"? This cannot be undone.`}
+                    confirmLabel="Delete"
+                    destructive
+                    onConfirm={handleDeleteConfirm}
+                    onCancel={() => setDeleteTarget(null)}
+                />
+            )}
+            <div className="flex items-center justify-between">
+                <Heading>Kettlebell</Heading>
+                <Button outline onClick={() => navigate('/kettlebell/analytics')}>
+                    <BarChart2 size={16} /> Analytics
+                </Button>
+            </div>
+
+            <div className="grid grid-cols-1 lg:grid-cols-3 gap-8">
+                {/* Left Column */}
+                <div className="space-y-6 lg:col-span-1">
+                    <div className="bg-surface p-6 rounded-2xl shadow-sm border border-border">
+                        <Subheading className="mb-6 text-primary">Generate Session</Subheading>
+                        <form onSubmit={handleGenerate} className="space-y-4">
+                            <Field>
+                                <Label>Focus</Label>
+                                <select
+                                    value={focus}
+                                    onChange={e => setFocus(e.target.value)}
+                                    className="w-full rounded-lg border border-border bg-base text-content px-3 py-2 text-sm focus:outline-none focus:ring-2 focus:ring-primary"
+                                >
+                                    {FOCUS_OPTIONS.map(f => (
+                                        <option key={f} value={f}>{f.charAt(0).toUpperCase() + f.slice(1)}</option>
+                                    ))}
+                                </select>
+                            </Field>
+                            <Field>
+                                <Label>Duration (minutes)</Label>
+                                <div className="flex gap-2">
+                                    {DURATION_OPTIONS.map(d => (
+                                        <button
+                                            key={d}
+                                            type="button"
+                                            onClick={() => setDuration(d)}
+                                            className={`flex-1 py-2 rounded-lg text-sm font-medium border transition-colors ${duration === d
+                                                ? 'bg-primary text-white border-primary'
+                                                : 'bg-base border-border text-content hover:bg-base/80'
+                                                }`}
+                                        >
+                                            {d}m
+                                        </button>
+                                    ))}
+                                </div>
+                            </Field>
+                            <Field>
+                                <Label>Available Weights (kg, comma-separated)</Label>
+                                <Input
+                                    type="text"
+                                    placeholder="e.g. 16, 24, 32"
+                                    value={weightsInput}
+                                    onChange={e => setWeightsInput(e.target.value)}
+                                />
+                            </Field>
+                            <Button type="submit" color="dark/zinc" disabled={loading} className="w-full">
+                                {loading ? 'Generating...' : 'Generate Session'}
+                            </Button>
+                        </form>
+                    </div>
+
+                    <div className="bg-surface p-6 rounded-2xl shadow-sm border border-border h-96 overflow-y-auto">
+                        <Subheading className="mb-4">History</Subheading>
+                        <div className="space-y-3">
+                            {sessions.map(s => (
+                                <div
+                                    key={s.id}
+                                    onClick={() => setSelected(s)}
+                                    className={`p-4 rounded-xl cursor-pointer transition-colors border-l-4 ${selected?.id === s.id
+                                        ? 'bg-base border-primary'
+                                        : 'bg-base/50 border-border hover:bg-base'
+                                        }`}
+                                >
+                                    <div className="flex items-center justify-between gap-2">
+                                        <p className="font-bold text-content truncate">{s.title}</p>
+                                        <div className="flex items-center gap-2 shrink-0">
+                                            <span className={`text-xs px-2 py-0.5 rounded-full ${statusColors[s.status] || statusColors.generated}`}>
+                                                {s.status}
+                                            </span>
+                                            <button
+                                                onClick={e => { e.stopPropagation(); setDeleteTarget(s); }}
+                                                className="text-content-muted hover:text-red-500 transition-colors text-xs leading-none"
+                                                title="Delete session"
+                                            >
+                                                ✕
+                                            </button>
+                                        </div>
+                                    </div>
+                                    <p className="text-xs text-content-muted mt-1">
+                                        {s.focus} · {s.total_duration_min}min · {new Date(s.created_at).toLocaleDateString()}
+                                    </p>
+                                </div>
+                            ))}
+                            {sessions.length === 0 && <p className="text-content-muted">No sessions yet.</p>}
+                        </div>
+                    </div>
+                </div>
+
+                {/* Right Column */}
+                <div className="lg:col-span-2">
+                    {selected ? (
+                        <div className="bg-surface p-8 rounded-2xl shadow-sm border border-border min-h-[600px] flex flex-col">
+                            <div className="flex justify-between items-start mb-6 border-b border-border pb-4">
+                                <div>
+                                    <Heading className="text-transparent bg-clip-text bg-gradient-to-r from-primary to-orange-400">
+                                        {selected.title}
+                                    </Heading>
+                                    <p className="text-content-muted mt-1 capitalize">
+                                        {selected.focus} · {selected.difficulty} · {selected.total_duration_min} min
+                                    </p>
+                                </div>
+                                <span className={`text-xs px-3 py-1 rounded-full border border-border ${statusColors[selected.status] || statusColors.generated}`}>
+                                    {selected.status}
+                                </span>
+                            </div>
+
+                            <div className="space-y-4 flex-1">
+                                {exercises.map((ex, i) => (
+                                    <div key={i} className="p-4 bg-base rounded-xl border border-border">
+                                        <div className="flex items-start justify-between">
+                                            <div>
+                                                <p className="font-bold text-content">{ex.order}. {ex.name}</p>
+                                                <p className="text-sm text-content-muted mt-0.5">{ex.description}</p>
+                                            </div>
+                                            <div className="text-right text-sm text-content-muted shrink-0 ml-4">
+                                                <p>{ex.sets} × {ex.reps > 0 ? `${ex.reps} reps` : `${ex.duration_seconds}s`}</p>
+                                                <p>{ex.weight_kg} kg</p>
+                                            </div>
+                                        </div>
+                                        <p className="text-xs text-primary mt-2 italic">"{ex.coaching_tip}"</p>
+                                    </div>
+                                ))}
+                            </div>
+
+                            {selected.notes && (
+                                <div className="mt-4 p-4 bg-base/50 rounded-xl border border-border">
+                                    <p className="text-sm text-content-muted">{selected.notes}</p>
+                                </div>
+                            )}
+
+                            {(selected.status === 'generated' || selected.status === 'in_progress') && (
+                                <div className="mt-6">
+                                    <Button
+                                        color="dark/zinc"
+                                        className="w-full"
+                                        onClick={() => navigate(`/kettlebell/session/${selected.id}`)}
+                                    >
+                                        {selected.status === 'in_progress' ? 'Resume Workout' : 'Start Workout'}
+                                    </Button>
+                                </div>
+                            )}
+                            {selected.status === 'abandoned' && (
+                                <div className="mt-6">
+                                    <Button
+                                        color="dark/zinc"
+                                        className="w-full"
+                                        onClick={() => handleRetry(selected.id)}
+                                    >
+                                        Retry Session
+                                    </Button>
+                                </div>
+                            )}
+                        </div>
+                    ) : (
+                        <div className="bg-surface p-8 rounded-2xl shadow-sm border border-border h-full flex flex-col items-center justify-center text-center">
+                            <div className="text-6xl mb-4">🏋️</div>
+                            <Heading level={2} className="mb-2">Ready to Train?</Heading>
+                            <p className="text-content-muted max-w-md">
+                                Generate an AI-powered kettlebell session tailored to your profile and goals.
+                            </p>
+                        </div>
+                    )}
+                </div>
+            </div>
+        </div>
+    );
+}

frontend/src/pages/KettlebellAnalytics.tsx

@@ -0,0 +1,242 @@
+import { useState, useEffect } from 'react';
+import { toast } from 'sonner';
+import {
+  BarChart, Bar, LineChart, Line, AreaChart, Area,
+  XAxis, YAxis, CartesianGrid, Tooltip, ResponsiveContainer, Legend,
+} from 'recharts';
+import { TrendingUp, Trophy, Zap, BarChart2, ChevronLeft } from 'lucide-react';
+import { Heading, Subheading } from '../components/catalyst/heading';
+import { Select } from '../components/catalyst/select';
+import { Button } from '../components/catalyst/button';
+import client from '../api/client';
+import { useNavigate } from 'react-router-dom';
+
+interface ExerciseProgression {
+  date: string;
+  max_weight: number;
+  avg_rpe: number;
+  total_volume: number;
+}
+
+interface PersonalRecord {
+  exercise_name: string;
+  max_weight: number;
+  date: string;
+}
+
+interface WeeklyVolume {
+  week: string;
+  sessions: number;
+  total_volume: number;
+}
+
+interface AnalyticsData {
+  weekly_sessions: WeeklyVolume[];
+  exercise_progressions: Record<string, ExerciseProgression[]>;
+  personal_records: PersonalRecord[];
+  avg_rpe_trend: { date: string; avg_rpe: number; session_title: string }[];
+}
+
+const KettlebellAnalytics = () => {
+  const [data, setData] = useState<AnalyticsData | null>(null);
+  const [loading, setLoading] = useState(true);
+  const [selectedExercise, setSelectedExercise] = useState('');
+  const navigate = useNavigate();
+
+  useEffect(() => {
+    const fetchAnalytics = async () => {
+      try {
+        const res = await client.get('/kettlebell/analytics');
+        setData(res.data);
+        const exercises = Object.keys(res.data.exercise_progressions);
+        if (exercises.length > 0) setSelectedExercise(exercises[0]);
+      } catch (err) {
+        console.error(err);
+        toast.error('Failed to load analytics');
+      } finally {
+        setLoading(false);
+      }
+    };
+    fetchAnalytics();
+  }, []);
+
+  if (loading) {
+    return <div className="p-8 text-center text-content-muted">Loading analytics...</div>;
+  }
+
+  if (!data) return null;
+
+  const hasData = data.weekly_sessions.length > 0;
+  const exerciseNames = Object.keys(data.exercise_progressions);
+  const progressionData = selectedExercise ? data.exercise_progressions[selectedExercise] ?? [] : [];
+
+  return (
+    <div className="max-w-7xl mx-auto space-y-8 animate-fade-in">
+      <div className="flex items-center gap-4">
+        <Button outline onClick={() => navigate('/kettlebell')}>
+          <ChevronLeft size={16} /> Back
+        </Button>
+        <div>
+          <Heading>Workout Analytics</Heading>
+          <p className="text-content-muted">Performance insights from your completed sessions.</p>
+        </div>
+      </div>
+
+      {!hasData ? (
+        <div className="text-center py-24 text-content-muted">
+          <BarChart2 size={64} className="mx-auto mb-4 opacity-30" />
+          <p className="text-xl font-semibold">No completed sessions yet</p>
+          <p className="text-sm mt-2">Complete some kettlebell sessions to see your analytics here.</p>
+        </div>
+      ) : (
+        <>
+          {/* Summary Stats */}
+          <div className="grid grid-cols-2 md:grid-cols-4 gap-4">
+            <div className="bg-surface p-5 rounded-2xl border border-border shadow-sm text-center">
+              <p className="text-2xl font-bold text-content">{data.weekly_sessions.reduce((a, w) => a + w.sessions, 0)}</p>
+              <p className="text-sm text-content-muted mt-1">Total Sessions</p>
+            </div>
+            <div className="bg-surface p-5 rounded-2xl border border-border shadow-sm text-center">
+              <p className="text-2xl font-bold text-content">{data.personal_records.length}</p>
+              <p className="text-sm text-content-muted mt-1">Exercises Tracked</p>
+            </div>
+            <div className="bg-surface p-5 rounded-2xl border border-border shadow-sm text-center">
+              <p className="text-2xl font-bold text-content">
+                {data.avg_rpe_trend.length > 0
+                  ? (data.avg_rpe_trend.reduce((a, r) => a + r.avg_rpe, 0) / data.avg_rpe_trend.length).toFixed(1)
+                  : '--'}
+              </p>
+              <p className="text-sm text-content-muted mt-1">Avg RPE</p>
+            </div>
+            <div className="bg-surface p-5 rounded-2xl border border-border shadow-sm text-center">
+              <p className="text-2xl font-bold text-content">
+                {Math.round(data.weekly_sessions.reduce((a, w) => a + w.total_volume, 0))} kg
+              </p>
+              <p className="text-sm text-content-muted mt-1">Total Volume</p>
+            </div>
+          </div>
+
+          <div className="grid grid-cols-1 lg:grid-cols-2 gap-8">
+            {/* Sessions per Week */}
+            <div className="bg-surface p-6 rounded-2xl border border-border shadow-sm">
+              <Subheading className="mb-6 flex items-center gap-2">
+                <BarChart2 size={18} className="text-primary" /> Sessions Per Week
+              </Subheading>
+              <div className="h-64">
+                <ResponsiveContainer width="100%" height="100%">
+                  <BarChart data={data.weekly_sessions}>
+                    <CartesianGrid strokeDasharray="3 3" vertical={false} stroke="var(--color-border)" opacity={0.5} />
+                    <XAxis dataKey="week" axisLine={false} tickLine={false} tick={{ fill: 'var(--color-text-muted)', fontSize: 11 }} />
+                    <YAxis allowDecimals={false} axisLine={false} tickLine={false} tick={{ fill: 'var(--color-text-muted)', fontSize: 12 }} />
+                    <Tooltip
+                      contentStyle={{ backgroundColor: 'var(--color-bg-surface)', borderColor: 'var(--color-border)', borderRadius: '8px' }}
+                      itemStyle={{ color: 'var(--color-text-main)' }}
+                    />
+                    <Bar dataKey="sessions" fill="var(--color-primary)" radius={[4, 4, 0, 0]} />
+                  </BarChart>
+                </ResponsiveContainer>
+              </div>
+            </div>
+
+            {/* RPE Trend */}
+            <div className="bg-surface p-6 rounded-2xl border border-border shadow-sm">
+              <Subheading className="mb-6 flex items-center gap-2">
+                <Zap size={18} className="text-primary" /> Avg RPE Trend
+              </Subheading>
+              <div className="h-64">
+                <ResponsiveContainer width="100%" height="100%">
+                  <LineChart data={data.avg_rpe_trend}>
+                    <CartesianGrid strokeDasharray="3 3" vertical={false} stroke="var(--color-border)" opacity={0.5} />
+                    <XAxis dataKey="date" axisLine={false} tickLine={false} tick={{ fill: 'var(--color-text-muted)', fontSize: 11 }} />
+                    <YAxis domain={[1, 10]} axisLine={false} tickLine={false} tick={{ fill: 'var(--color-text-muted)', fontSize: 12 }} />
+                    <Tooltip
+                      contentStyle={{ backgroundColor: 'var(--color-bg-surface)', borderColor: 'var(--color-border)', borderRadius: '8px' }}
+                      itemStyle={{ color: 'var(--color-text-main)' }}
+                    />
+                    <Line type="monotone" dataKey="avg_rpe" stroke="#F59E0B" strokeWidth={3} dot={{ r: 4, fill: '#F59E0B' }} activeDot={{ r: 6 }} />
+                  </LineChart>
+                </ResponsiveContainer>
+              </div>
+            </div>
+          </div>
+
+          {/* Exercise Weight Progression */}
+          {exerciseNames.length > 0 && (
+            <div className="bg-surface p-6 rounded-2xl border border-border shadow-sm">
+              <div className="flex items-center justify-between mb-6">
+                <Subheading className="flex items-center gap-2">
+                  <TrendingUp size={18} className="text-primary" /> Weight Progression
+                </Subheading>
+                <Select
+                  value={selectedExercise}
+                  onChange={e => setSelectedExercise(e.target.value)}
+                  className="text-sm max-w-xs"
+                >
+                  {exerciseNames.map(name => (
+                    <option key={name} value={name}>{name}</option>
+                  ))}
+                </Select>
+              </div>
+              <div className="h-72">
+                <ResponsiveContainer width="100%" height="100%">
+                  <AreaChart data={progressionData}>
+                    <defs>
+                      <linearGradient id="colorWeight" x1="0" y1="0" x2="0" y2="1">
+                        <stop offset="5%" stopColor="var(--color-primary)" stopOpacity={0.3} />
+                        <stop offset="95%" stopColor="var(--color-primary)" stopOpacity={0} />
+                      </linearGradient>
+                    </defs>
+                    <CartesianGrid strokeDasharray="3 3" vertical={false} stroke="var(--color-border)" opacity={0.5} />
+                    <XAxis dataKey="date" axisLine={false} tickLine={false} tick={{ fill: 'var(--color-text-muted)', fontSize: 11 }} />
+                    <YAxis axisLine={false} tickLine={false} tick={{ fill: 'var(--color-text-muted)', fontSize: 12 }} />
+                    <Tooltip
+                      contentStyle={{ backgroundColor: 'var(--color-bg-surface)', borderColor: 'var(--color-border)', borderRadius: '8px' }}
+                      itemStyle={{ color: 'var(--color-text-main)' }}
+                    />
+                    <Legend />
+                    <Area type="monotone" dataKey="max_weight" name="Max Weight (kg)" stroke="var(--color-primary)" strokeWidth={3} fillOpacity={1} fill="url(#colorWeight)" />
+                    <Area type="monotone" dataKey="total_volume" name="Volume (kg)" stroke="#10B981" strokeWidth={2} fill="none" />
+                  </AreaChart>
+                </ResponsiveContainer>
+              </div>
+            </div>
+          )}
+
+          {/* Personal Records Table */}
+          {data.personal_records.length > 0 && (
+            <div className="bg-surface p-6 rounded-2xl border border-border shadow-sm">
+              <Subheading className="mb-6 flex items-center gap-2">
+                <Trophy size={18} className="text-primary" /> Personal Records
+              </Subheading>
+              <div className="overflow-x-auto">
+                <table className="w-full text-sm">
+                  <thead>
+                    <tr className="border-b border-border">
+                      <th className="text-left py-3 px-4 text-content-muted font-medium">Exercise</th>
+                      <th className="text-right py-3 px-4 text-content-muted font-medium">Max Weight</th>
+                      <th className="text-right py-3 px-4 text-content-muted font-medium">Date</th>
+                    </tr>
+                  </thead>
+                  <tbody>
+                    {data.personal_records.map((pr, i) => (
+                      <tr key={pr.exercise_name} className={`border-b border-border/50 hover:bg-base/50 transition-colors ${i === 0 ? 'text-primary font-semibold' : ''}`}>
+                        <td className="py-3 px-4 text-content">
+                          {i === 0 && <Trophy size={14} className="inline mr-2 text-yellow-500" />}
+                          {pr.exercise_name}
+                        </td>
+                        <td className="py-3 px-4 text-right font-mono">{pr.max_weight} kg</td>
+                        <td className="py-3 px-4 text-right text-content-muted">{pr.date}</td>
+                      </tr>
+                    ))}
+                  </tbody>
+                </table>
+              </div>
+            </div>
+          )}
+        </>
+      )}
+    </div>
+  );
+};
+
+export default KettlebellAnalytics;

frontend/src/pages/Nutrition.tsx

@@ -1,4 +1,5 @@
-import { useState, useRef, FormEvent, ChangeEvent } from 'react';
+import { useState, useRef, ChangeEvent } from 'react';
+import { toast } from 'sonner';
 import client from '../api/client';
 import {
     Upload,
@@ -14,7 +15,7 @@ import {
     Info,
     Utensils
 } from 'lucide-react';
-import { Field, Label } from '../components/catalyst/fieldset';
+import { Field } from '../components/catalyst/fieldset';
 import { Textarea } from '../components/catalyst/textarea';
 import { Button } from '../components/catalyst/button';
 import { Heading } from '../components/catalyst/heading';
@@ -78,7 +79,7 @@ const Nutrition = () => {
             setShowReasoning(false);
         } catch (error) {
             console.error(error);
-            alert('Failed to analyze. Please try again.');
+            toast.error('Failed to analyze. Please try again.');
         } finally {
             setLoading(false);
         }
@@ -91,10 +92,10 @@ const Nutrition = () => {
             setAnalysis(null);
             setDescription('');
             clearFile();
-            alert('Meal logged successfully!');
+            toast.success('Meal logged successfully!');
         } catch (error) {
             console.error(error);
-            alert('Failed to save log.');
+            toast.error('Failed to save log.');
         }
     };
 

frontend/src/pages/Plans.tsx

@@ -1,4 +1,5 @@
 import { useState, useEffect, FormEvent } from 'react';
+import { toast } from 'sonner';
 import client from '../api/client';
 import { Field, Label } from '../components/catalyst/fieldset';
 import { Input } from '../components/catalyst/input';
@@ -52,7 +53,7 @@ const Plans = () => {
             setUserDetails('');
         } catch (error) {
             console.error(error);
-            alert('Failed to generate plan');
+            toast.error('Failed to generate plan');
         } finally {
             setLoading(false);
         }

frontend/src/pages/Profile.tsx

@@ -1,11 +1,13 @@
 import { useState, useEffect, useContext, FormEvent, ChangeEvent } from 'react';
 import { AuthContext } from '../context/AuthContext';
-import { User, Ruler, Weight, Activity, Save, AlertCircle } from 'lucide-react';
+import { toast } from 'sonner';
+import { User, Ruler, Weight, Activity, Save, Target, Bell } from 'lucide-react';
 import { Field, Label, Fieldset, Legend } from '../components/catalyst/fieldset';
 import { Input } from '../components/catalyst/input';
 import { Select } from '../components/catalyst/select';
 import { Button } from '../components/catalyst/button';
 import { Heading } from '../components/catalyst/heading';
+import { getVapidPublicKey, subscribePush, unsubscribePush, sendTestNotification, urlBase64ToUint8Array } from '../api/push';
 
 interface FormData {
     firstname: string;
@@ -22,9 +24,21 @@ interface FormData {
 const Profile = () => {
     const { user, updateUser } = useContext(AuthContext);
     const [loading, setLoading] = useState(false);
-    const [message, setMessage] = useState({ type: '', text: '' });
+    const [targets, setTargets] = useState({
+        target_calories: '',
+        target_protein: '',
+        target_carbs: '',
+        target_fat: '',
+    });
 
     const [unitSystem, setUnitSystem] = useState('metric'); // 'metric' or 'imperial'
+
+    // Push notification state
+    const [notifEnabled, setNotifEnabled] = useState(false);
+    const [notifLoading, setNotifLoading] = useState(false);
+    const [reminderHour, setReminderHour] = useState(9);
+    const [reminderMinute, setReminderMinute] = useState(0);
+    const [currentSub, setCurrentSub] = useState<PushSubscription | null>(null);
     const [formData, setFormData] = useState<FormData>({
         firstname: '',
         lastname: '',
@@ -41,6 +55,12 @@ const Profile = () => {
         if (user) {
             const prefs = user.unit_preference || 'metric';
             setUnitSystem(prefs);
+            setTargets({
+                target_calories: user.target_calories?.toString() || '',
+                target_protein: user.target_protein?.toString() || '',
+                target_carbs: user.target_carbs?.toString() || '',
+                target_fat: user.target_fat?.toString() || '',
+            });
 
             const h_cm = user.height || '';
             const w_kg = user.weight || '';
@@ -70,6 +90,86 @@ const Profile = () => {
         }
     }, [user]);
 
+    useEffect(() => {
+        if ('serviceWorker' in navigator && 'PushManager' in window) {
+            navigator.serviceWorker.ready
+                .then((reg) => reg.pushManager.getSubscription())
+                .then((sub) => {
+                    if (sub) {
+                        setCurrentSub(sub);
+                        setNotifEnabled(true);
+                    }
+                });
+        }
+    }, []);
+
+    const handleEnableNotifications = async () => {
+        setNotifLoading(true);
+        try {
+            const permission = await Notification.requestPermission();
+            if (permission !== 'granted') {
+                toast.error('Notification permission denied');
+                return;
+            }
+            const publicKey = await getVapidPublicKey();
+            const reg = await navigator.serviceWorker.ready;
+            const sub = await reg.pushManager.subscribe({
+                userVisibleOnly: true,
+                applicationServerKey: urlBase64ToUint8Array(publicKey),
+            });
+            const json = sub.toJSON();
+            await subscribePush({
+                endpoint: json.endpoint!,
+                keys: { p256dh: json.keys!.p256dh, auth: json.keys!.auth },
+                reminder_hour: reminderHour,
+                reminder_minute: reminderMinute,
+                timezone: Intl.DateTimeFormat().resolvedOptions().timeZone,
+            });
+            setCurrentSub(sub);
+            setNotifEnabled(true);
+            toast.success('Notifications enabled!');
+        } catch (err) {
+            console.error('Push subscribe error:', err);
+            toast.error('Failed to enable notifications');
+        } finally {
+            setNotifLoading(false);
+        }
+    };
+
+    const handleDisableNotifications = async () => {
+        setNotifLoading(true);
+        try {
+            if (currentSub) {
+                await unsubscribePush(currentSub.endpoint);
+                await currentSub.unsubscribe();
+            }
+            setCurrentSub(null);
+            setNotifEnabled(false);
+            toast.success('Notifications disabled');
+        } catch {
+            toast.error('Failed to disable notifications');
+        } finally {
+            setNotifLoading(false);
+        }
+    };
+
+    const handleUpdateReminderTime = async () => {
+        if (!currentSub) return;
+        try {
+            const json = currentSub.toJSON();
+            await subscribePush({
+                endpoint: json.endpoint!,
+                keys: { p256dh: json.keys!.p256dh, auth: json.keys!.auth },
+                reminder_hour: reminderHour,
+                reminder_minute: reminderMinute,
+                timezone: Intl.DateTimeFormat().resolvedOptions().timeZone,
+            });
+            toast.success('Reminder time updated');
+        } catch {
+            toast.error('Failed to update reminder time');
+        }
+    };
+
     const handleUnitChange = (system: string) => {
         setUnitSystem(system);
     };
@@ -108,9 +208,8 @@ const Profile = () => {
     const handleSubmit = async (e: FormEvent) => {
         e.preventDefault();
         setLoading(true);
-        setMessage({ type: '', text: '' });
 
-        const payload = {
+        const payload: Record<string, unknown> = {
             firstname: formData.firstname,
             lastname: formData.lastname,
             age: parseInt(formData.age),
@@ -119,12 +218,16 @@ const Profile = () => {
             height: parseFloat(String(formData.height_cm)),
             weight: parseFloat(String(formData.weight_kg)),
         };
+        if (targets.target_calories) payload.target_calories = parseFloat(targets.target_calories);
+        if (targets.target_protein) payload.target_protein = parseFloat(targets.target_protein);
+        if (targets.target_carbs) payload.target_carbs = parseFloat(targets.target_carbs);
+        if (targets.target_fat) payload.target_fat = parseFloat(targets.target_fat);
 
         const success = await updateUser(payload);
         if (success) {
-            setMessage({ type: 'success', text: 'Profile updated successfully!' });
+            toast.success('Profile updated successfully!');
         } else {
-            setMessage({ type: 'error', text: 'Failed to update profile.' });
+            toast.error('Failed to update profile.');
         }
         setLoading(false);
     };
@@ -137,14 +240,6 @@ const Profile = () => {
             </header>
 
             <div className="bg-surface p-8 rounded-2xl shadow-sm border border-border">
-                {message.text && (
-                    <div className={`p-4 mb-6 rounded-lg flex items-center gap-3 ${message.type === 'success' ? 'bg-green-100 text-green-800 dark:bg-green-900/30 dark:text-green-300' : 'bg-red-100 text-red-800'
-                        }`}>
-                        <AlertCircle size={20} />
-                        {message.text}
-                    </div>
-                )}
-
                 <form onSubmit={handleSubmit} className="space-y-8">
                     {/* Personal Info */}
                     <Fieldset>
@@ -298,6 +393,122 @@ const Profile = () => {
                         </div>
                     </Fieldset>
 
+                    <div className="border-t border-border my-6"></div>
+
+                    {/* Nutrition Targets */}
+                    <Fieldset>
+                        <Legend className="flex items-center gap-2">
+                            <Target className="text-primary" size={24} />
+                            Daily Nutrition Targets
+                        </Legend>
+                        <div className="grid grid-cols-2 md:grid-cols-4 gap-6 mt-6">
+                            <Field>
+                                <Label>Calories (kcal)</Label>
+                                <Input
+                                    type="number"
+                                    value={targets.target_calories}
+                                    onChange={(e) => setTargets(t => ({ ...t, target_calories: e.target.value }))}
+                                    placeholder="2000"
+                                />
+                            </Field>
+                            <Field>
+                                <Label>Protein (g)</Label>
+                                <Input
+                                    type="number"
+                                    value={targets.target_protein}
+                                    onChange={(e) => setTargets(t => ({ ...t, target_protein: e.target.value }))}
+                                    placeholder="150"
+                                />
+                            </Field>
+                            <Field>
+                                <Label>Carbs (g)</Label>
+                                <Input
+                                    type="number"
+                                    value={targets.target_carbs}
+                                    onChange={(e) => setTargets(t => ({ ...t, target_carbs: e.target.value }))}
+                                    placeholder="200"
+                                />
+                            </Field>
+                            <Field>
+                                <Label>Fat (g)</Label>
+                                <Input
+                                    type="number"
+                                    value={targets.target_fat}
+                                    onChange={(e) => setTargets(t => ({ ...t, target_fat: e.target.value }))}
+                                    placeholder="65"
+                                />
+                            </Field>
+                        </div>
+                    </Fieldset>
+
+                    <div className="border-t border-border my-6"></div>
+
+                    {/* Notifications */}
+                    {'serviceWorker' in navigator && 'PushManager' in window && (
+                        <Fieldset>
+                            <Legend className="flex items-center gap-2">
+                                <Bell className="text-primary" size={24} />
+                                Notifications
+                            </Legend>
+                            <p className="text-content-muted text-sm mt-1">
+                                Receive daily reminders to log your supplements.
+                            </p>
+
+                            <div className="mt-6 space-y-6">
+                                <div className="flex items-center justify-between max-w-sm">
+                                    <Label>Enable supplement reminders</Label>
+                                    <button
+                                        type="button"
+                                        disabled={notifLoading}
+                                        onClick={notifEnabled ? handleDisableNotifications : handleEnableNotifications}
+                                        className={`relative inline-flex h-6 w-11 items-center rounded-full transition-colors focus:outline-none disabled:opacity-50 ${notifEnabled ? 'bg-primary' : 'bg-zinc-300 dark:bg-zinc-600'}`}
+                                    >
+                                        <span className={`inline-block h-4 w-4 transform rounded-full bg-white transition-transform ${notifEnabled ? 'translate-x-6' : 'translate-x-1'}`} />
+                                    </button>
+                                </div>
+
+                                {notifEnabled && (
+                                    <div className="space-y-4">
+                                        <div className="grid grid-cols-2 gap-4 max-w-xs">
+                                            <Field>
+                                                <Label>Hour (0–23)</Label>
+                                                <Input
+                                                    type="number"
+                                                    min={0}
+                                                    max={23}
+                                                    value={reminderHour}
+                                                    onChange={(e) => setReminderHour(parseInt(e.target.value) || 0)}
+                                                />
+                                            </Field>
+                                            <Field>
+                                                <Label>Minute</Label>
+                                                <Input
+                                                    type="number"
+                                                    min={0}
+                                                    max={59}
+                                                    value={reminderMinute}
+                                                    onChange={(e) => setReminderMinute(parseInt(e.target.value) || 0)}
+                                                />
+                                            </Field>
+                                        </div>
+                                        <div className="flex gap-3">
+                                            <Button type="button" color="dark/zinc" onClick={handleUpdateReminderTime}>
+                                                Update reminder time
+                                            </Button>
+                                            <Button
+                                                type="button"
+                                                outline
+                                                onClick={() => sendTestNotification().then(() => toast.success('Test notification sent!')).catch(() => toast.error('Failed to send test'))}
+                                            >
+                                                Send test
+                                            </Button>
+                                        </div>
+                                    </div>
+                                )}
+                            </div>
+                        </Fieldset>
+                    )}
+
                     <div className="pt-4 flex justify-end">
                         <Button
                             type="submit"

frontend/src/pages/Supplements.tsx

@@ -0,0 +1,343 @@
+import { useState, useEffect, FormEvent } from 'react';
+import { toast } from 'sonner';
+import { CheckCircle2, Circle, Plus, Pill, Flame, Trash2, X } from 'lucide-react';
+import { Heading } from '../components/catalyst/heading';
+import { Button } from '../components/catalyst/button';
+import { Field, Label } from '../components/catalyst/fieldset';
+import { Input } from '../components/catalyst/input';
+import { Select } from '../components/catalyst/select';
+import {
+  getTodaySupplements,
+  createSupplement,
+  deleteSupplement,
+  logSupplement,
+} from '../api/supplements';
+import type { SupplementCreate, SupplementWithStatus } from '../types/supplement';
+
+const UNITS = ['mg', 'mcg', 'IU', 'g', 'ml', 'capsule', 'tablet'];
+const FREQUENCIES = ['daily', 'weekly', 'as_needed'];
+
+const DEFAULT_FORM: SupplementCreate = {
+  name: '',
+  dosage: 0,
+  unit: 'mg',
+  frequency: 'daily',
+  scheduled_times: [],
+  notes: '',
+};
+
+const Supplements = () => {
+  const [supplements, setSupplements] = useState<SupplementWithStatus[]>([]);
+  const [loading, setLoading] = useState(true);
+  const [showForm, setShowForm] = useState(false);
+  const [form, setForm] = useState<SupplementCreate>(DEFAULT_FORM);
+  const [submitting, setSubmitting] = useState(false);
+  const [timeInput, setTimeInput] = useState('');
+  const [activeTab, setActiveTab] = useState<'today' | 'manage'>('today');
+
+  const fetchData = async () => {
+    try {
+      const data = await getTodaySupplements();
+      setSupplements(data);
+    } catch (err) {
+      console.error(err);
+      toast.error('Failed to load supplements');
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  useEffect(() => {
+    fetchData();
+  }, []);
+
+  const handleToggle = async (s: SupplementWithStatus) => {
+    if (s.taken_today) return; // can't untake
+    try {
+      await logSupplement(s.id);
+      setSupplements(prev =>
+        prev.map(item => item.id === s.id ? { ...item, taken_today: true, streak: item.streak + 1 } : item)
+      );
+      toast.success(`${s.name} logged!`);
+    } catch (err) {
+      console.error(err);
+      toast.error('Failed to log supplement');
+    }
+  };
+
+  const handleAddTime = () => {
+    if (!timeInput) return;
+    setForm(f => ({ ...f, scheduled_times: [...f.scheduled_times, timeInput] }));
+    setTimeInput('');
+  };
+
+  const handleRemoveTime = (t: string) => {
+    setForm(f => ({ ...f, scheduled_times: f.scheduled_times.filter(x => x !== t) }));
+  };
+
+  const handleSubmit = async (e: FormEvent) => {
+    e.preventDefault();
+    if (!form.name || form.dosage <= 0) {
+      toast.error('Please fill in name and dosage');
+      return;
+    }
+    setSubmitting(true);
+    try {
+      await createSupplement(form);
+      toast.success(`${form.name} added!`);
+      setForm(DEFAULT_FORM);
+      setShowForm(false);
+      fetchData();
+    } catch (err) {
+      console.error(err);
+      toast.error('Failed to add supplement');
+    } finally {
+      setSubmitting(false);
+    }
+  };
+
+  const handleDelete = async (id: number, name: string) => {
+    try {
+      await deleteSupplement(id);
+      toast.success(`${name} removed`);
+      fetchData();
+    } catch (err) {
+      console.error(err);
+      toast.error('Failed to remove supplement');
+    }
+  };
+
+  const taken = supplements.filter(s => s.taken_today).length;
+  const total = supplements.length;
+  const progress = total > 0 ? Math.round((taken / total) * 100) : 0;
+
+  if (loading) {
+    return <div className="p-8 text-center text-content-muted">Loading supplements...</div>;
+  }
+
+  return (
+    <div className="max-w-4xl mx-auto space-y-8 animate-fade-in">
+      <div className="flex items-center justify-between">
+        <div>
+          <Heading>Supplements</Heading>
+          <p className="text-content-muted">Track your daily supplement intake.</p>
+        </div>
+        <Button color="dark/zinc" onClick={() => setShowForm(!showForm)}>
+          <Plus size={16} /> Add Supplement
+        </Button>
+      </div>
+
+      {/* Add Supplement Form */}
+      {showForm && (
+        <div className="bg-surface p-6 rounded-2xl border border-border shadow-sm">
+          <div className="flex justify-between items-center mb-4">
+            <Heading>New Supplement</Heading>
+            <button onClick={() => setShowForm(false)} className="text-content-muted hover:text-content">
+              <X size={20} />
+            </button>
+          </div>
+          <form onSubmit={handleSubmit} className="space-y-4">
+            <div className="grid grid-cols-1 md:grid-cols-2 gap-4">
+              <Field>
+                <Label>Name</Label>
+                <Input
+                  type="text"
+                  value={form.name}
+                  onChange={e => setForm(f => ({ ...f, name: e.target.value }))}
+                  placeholder="Vitamin D3"
+                  required
+                />
+              </Field>
+              <div className="grid grid-cols-2 gap-3">
+                <Field>
+                  <Label>Dosage</Label>
+                  <Input
+                    type="number"
+                    step="0.01"
+                    value={form.dosage || ''}
+                    onChange={e => setForm(f => ({ ...f, dosage: parseFloat(e.target.value) || 0 }))}
+                    placeholder="5000"
+                    required
+                  />
+                </Field>
+                <Field>
+                  <Label>Unit</Label>
+                  <Select value={form.unit} onChange={e => setForm(f => ({ ...f, unit: e.target.value }))}>
+                    {UNITS.map(u => <option key={u} value={u}>{u}</option>)}
+                  </Select>
+                </Field>
+              </div>
+              <Field>
+                <Label>Frequency</Label>
+                <Select value={form.frequency} onChange={e => setForm(f => ({ ...f, frequency: e.target.value }))}>
+                  {FREQUENCIES.map(freq => (
+                    <option key={freq} value={freq}>{freq.replace('_', ' ')}</option>
+                  ))}
+                </Select>
+              </Field>
+              <Field>
+                <Label>Notes (optional)</Label>
+                <Input
+                  type="text"
+                  value={form.notes || ''}
+                  onChange={e => setForm(f => ({ ...f, notes: e.target.value }))}
+                  placeholder="Take with food"
+                />
+              </Field>
+            </div>
+
+            {/* Scheduled Times */}
+            <div>
+              <p className="text-sm font-medium text-content mb-1">Scheduled Times</p>
+              <div className="flex gap-2 mt-1">
+                <Input
+                  type="time"
+                  value={timeInput}
+                  onChange={e => setTimeInput(e.target.value)}
+                  className="w-36"
+                />
+                <Button type="button" outline onClick={handleAddTime}>Add Time</Button>
+              </div>
+              {form.scheduled_times.length > 0 && (
+                <div className="flex flex-wrap gap-2 mt-2">
+                  {form.scheduled_times.map(t => (
+                    <span key={t} className="flex items-center gap-1 px-3 py-1 bg-primary/10 text-primary text-sm rounded-full">
+                      {t}
+                      <button type="button" onClick={() => handleRemoveTime(t)} className="hover:text-red-500">
+                        <X size={12} />
+                      </button>
+                    </span>
+                  ))}
+                </div>
+              )}
+            </div>
+
+            <div className="flex gap-3">
+              <Button type="submit" color="dark/zinc" disabled={submitting}>
+                {submitting ? 'Adding...' : 'Add Supplement'}
+              </Button>
+              <Button type="button" outline onClick={() => setShowForm(false)}>Cancel</Button>
+            </div>
+          </form>
+        </div>
+      )}
+
+      {/* Tabs */}
+      <div className="flex gap-1 bg-surface p-1 rounded-xl border border-border w-fit">
+        {(['today', 'manage'] as const).map(tab => (
+          <button
+            key={tab}
+            onClick={() => setActiveTab(tab)}
+            className={`px-5 py-2 rounded-lg text-sm font-medium transition-all capitalize ${
+              activeTab === tab
+                ? 'bg-primary text-white shadow-sm'
+                : 'text-content-muted hover:text-content'
+            }`}
+          >
+            {tab === 'today' ? "Today's Checklist" : 'Manage'}
+          </button>
+        ))}
+      </div>
+
+      {activeTab === 'today' && (
+        <div className="space-y-6">
+          {/* Daily Progress */}
+          {total > 0 && (
+            <div className="bg-surface p-6 rounded-2xl border border-border shadow-sm">
+              <div className="flex justify-between items-center mb-3">
+                <span className="font-semibold text-content">Daily Progress</span>
+                <span className="text-sm font-medium text-content-muted">{taken} / {total} taken</span>
+              </div>
+              <div className="w-full bg-base rounded-full h-3 overflow-hidden border border-border">
+                <div
+                  className="h-full rounded-full bg-primary transition-all duration-500"
+                  style={{ width: `${progress}%` }}
+                />
+              </div>
+              <p className="text-xs text-content-muted mt-2">{progress}% complete</p>
+            </div>
+          )}
+
+          {/* Supplement Checklist */}
+          {supplements.length === 0 ? (
+            <div className="text-center py-16 text-content-muted">
+              <Pill size={48} className="mx-auto mb-4 opacity-30" />
+              <p className="text-lg font-medium">No supplements yet</p>
+              <p className="text-sm">Click "Add Supplement" to get started.</p>
+            </div>
+          ) : (
+            <div className="space-y-3">
+              {supplements.map(s => (
+                <div
+                  key={s.id}
+                  onClick={() => handleToggle(s)}
+                  className={`flex items-center gap-4 p-4 rounded-2xl border cursor-pointer transition-all duration-200 ${
+                    s.taken_today
+                      ? 'bg-primary/5 border-primary/30 opacity-75'
+                      : 'bg-surface border-border hover:border-primary/50 hover:shadow-sm'
+                  }`}
+                >
+                  <div className={`flex-shrink-0 ${s.taken_today ? 'text-primary' : 'text-content-muted'}`}>
+                    {s.taken_today ? <CheckCircle2 size={28} /> : <Circle size={28} />}
+                  </div>
+                  <div className="flex-1 min-w-0">
+                    <div className="flex items-center gap-2">
+                      <p className={`font-semibold text-content ${s.taken_today ? 'line-through opacity-60' : ''}`}>
+                        {s.name}
+                      </p>
+                      {s.streak > 1 && (
+                        <span className="flex items-center gap-1 text-xs text-orange-500 font-medium">
+                          <Flame size={12} /> {s.streak}d
+                        </span>
+                      )}
+                    </div>
+                    <p className="text-sm text-content-muted">
+                      {s.dosage} {s.unit}
+                      {s.scheduled_times?.length > 0 && ` · ${s.scheduled_times.join(', ')}`}
+                    </p>
+                  </div>
+                  {s.taken_today && (
+                    <span className="text-xs font-medium text-primary bg-primary/10 px-2 py-1 rounded-full">
+                      Done
+                    </span>
+                  )}
+                </div>
+              ))}
+            </div>
+          )}
+        </div>
+      )}
+
+      {activeTab === 'manage' && (
+        <div className="space-y-3">
+          {supplements.length === 0 ? (
+            <div className="text-center py-16 text-content-muted">
+              <Pill size={48} className="mx-auto mb-4 opacity-30" />
+              <p>No supplements added yet.</p>
+            </div>
+          ) : (
+            supplements.map(s => (
+              <div key={s.id} className="flex items-center justify-between p-4 bg-surface rounded-2xl border border-border">
+                <div>
+                  <p className="font-semibold text-content">{s.name}</p>
+                  <p className="text-sm text-content-muted">
+                    {s.dosage} {s.unit} · {s.frequency}
+                    {s.notes && ` · ${s.notes}`}
+                  </p>
+                </div>
+                <button
+                  onClick={() => handleDelete(s.id, s.name)}
+                  className="p-2 text-content-muted hover:text-red-500 transition-colors rounded-lg hover:bg-red-50 dark:hover:bg-red-900/20"
+                >
+                  <Trash2 size={18} />
+                </button>
+              </div>
+            ))
+          )}
+        </div>
+      )}
+    </div>
+  );
+};
+
+export default Supplements;

frontend/src/sw.ts

@@ -0,0 +1,51 @@
+/// <reference lib="webworker" />
+import { precacheAndRoute, cleanupOutdatedCaches } from 'workbox-precaching';
+
+declare const self: ServiceWorkerGlobalScope;
+
+// self.__WB_MANIFEST is replaced by vite-plugin-pwa with the actual precache manifest array
+precacheAndRoute(self.__WB_MANIFEST);
+cleanupOutdatedCaches();
+
+self.addEventListener('install', () => self.skipWaiting());
+self.addEventListener('activate', (e) => e.waitUntil(self.clients.claim()));
+
+self.addEventListener('push', (event: PushEvent) => {
+  console.log('[SW] push received', event.data?.text());
+  if (!event.data) return;
+
+  let title = 'HealthyFit';
+  let body = 'You have a new notification';
+  let url = '/';
+  try {
+    const data = event.data.json() as { title: string; body: string; url?: string };
+    title = data.title;
+    body = data.body;
+    url = data.url ?? '/';
+  } catch {
+    body = event.data.text();
+  }
+
+  event.waitUntil(
+    self.registration.showNotification(title, {
+      body,
+      icon: '/icons/icon-192.png',
+      badge: '/icons/icon-192.png',
+      data: { url },
+    })
+  );
+});
+
+self.addEventListener('notificationclick', (event: NotificationEvent) => {
+  event.notification.close();
+  const url = (event.notification.data as { url: string }).url;
+  event.waitUntil(
+    self.clients
+      .matchAll({ type: 'window', includeUncontrolled: true })
+      .then((clients) => {
+        const existing = clients.find((c) => c.url.includes(url));
+        if (existing) return existing.focus();
+        return self.clients.openWindow(url);
+      })
+  );
+});

frontend/src/types/calendar.ts

@@ -0,0 +1,49 @@
+import type { SupplementWithStatus } from './supplement';
+
+export interface DayMeta {
+  date: string; // "YYYY-MM-DD"
+  has_note: boolean;
+  event_count: number;
+  supplement_compliance: number | null; // 0.0–1.0
+  has_workout: boolean;
+  calorie_total: number | null;
+}
+
+export interface DailyNote {
+  id?: number;
+  date: string;
+  content: string;
+  mood?: string;
+  energy_level?: number;
+  updated_at?: string;
+}
+
+export interface CalendarEvent {
+  id?: number;
+  date: string;
+  title: string;
+  description?: string;
+  event_type: 'workout' | 'supplement' | 'general';
+  color?: string;
+  start_time?: string;
+  is_completed: boolean;
+  created_at?: string;
+}
+
+export interface KettlebellSessionSummary {
+  id: number;
+  title: string;
+  focus: string;
+  total_duration_min: number;
+  difficulty: string;
+  status: string;
+  completed_at?: string;
+}
+
+export interface DayDetail {
+  date: string;
+  note: DailyNote | null;
+  events: CalendarEvent[];
+  supplements: SupplementWithStatus[];
+  kettlebell_sessions: KettlebellSessionSummary[];
+}

frontend/src/types/health.ts

@@ -0,0 +1,27 @@
+export interface HealthMetric {
+  id: number;
+  metric_type: string;
+  value: number;
+  unit: string;
+  timestamp: string;
+}
+
+export interface HealthGoal {
+  id: number;
+  goal_type: string;
+  target_value: number;
+  target_date?: string;
+  created_at: string;
+}
+
+export interface HealthMetricCreate {
+  metric_type: string;
+  value: number;
+  unit: string;
+}
+
+export interface HealthGoalCreate {
+  goal_type: string;
+  target_value: number;
+  target_date?: string | null;
+}

frontend/src/types/kettlebell.ts

@@ -0,0 +1,38 @@
+export interface ExerciseBlock {
+    order: number;
+    name: string;
+    description: string;
+    sets: number;
+    reps: number;
+    duration_seconds: number; // reps=0 → timed, duration_seconds=0 → rep-based
+    weight_kg: number;
+    rest_seconds: number;
+    coaching_tip: string;
+}
+
+export interface KettlebellSession {
+    id: number;
+    user_id: number;
+    title: string;
+    focus: string;
+    exercises: { exercises: ExerciseBlock[] };
+    total_duration_min: number;
+    difficulty: string;
+    notes: string;
+    status: 'generated' | 'in_progress' | 'completed' | 'abandoned';
+    started_at: string | null;
+    completed_at: string | null;
+    created_at: string;
+}
+
+export interface KettlebellSetLog {
+    id: number;
+    session_id: number;
+    exercise_order: number;
+    set_number: number;
+    actual_reps: number;
+    actual_weight_kg: number;
+    actual_duration_seconds: number;
+    perceived_effort: number;
+    completed_at: string;
+}

frontend/src/types/nutrition.ts

@@ -0,0 +1,41 @@
+export interface NutritionalInfo {
+  name: string;
+  calories: number;
+  protein: number;
+  carbs: number;
+  fats: number;
+  reasoning?: string;
+}
+
+export interface FoodLog {
+  id: number;
+  user_id: number;
+  name: string;
+  calories: number;
+  protein: number;
+  carbs: number;
+  fats: number;
+  image_url?: string;
+  timestamp: string;
+}
+
+export interface FoodLogCreate {
+  name: string;
+  calories: number;
+  protein: number;
+  carbs: number;
+  fats: number;
+}
+
+export interface NutritionSummary {
+  date: string;
+  total_calories: number;
+  total_protein: number;
+  total_carbs: number;
+  total_fats: number;
+  log_count: number;
+  target_calories?: number;
+  target_protein?: number;
+  target_carbs?: number;
+  target_fat?: number;
+}

frontend/src/types/plans.ts

@@ -0,0 +1,18 @@
+export interface Plan {
+  id: number;
+  goal: string;
+  created_at: string;
+  content: string;
+  structured_content?: {
+    title?: string;
+    summary?: string;
+    diet_plan?: string[];
+    exercise_plan?: string[];
+    tips?: string[];
+  };
+}
+
+export interface PlanRequest {
+  goal: string;
+  user_details: string;
+}

frontend/src/types/supplement.ts

@@ -0,0 +1,45 @@
+export interface Supplement {
+  id: number;
+  user_id: number;
+  name: string;
+  dosage: number;
+  unit: string;
+  frequency: string;
+  scheduled_times: string[];
+  notes?: string;
+  is_active: boolean;
+  created_at: string;
+}
+
+export interface SupplementWithStatus extends Supplement {
+  taken_today: boolean;
+  streak: number;
+}
+
+export interface SupplementLog {
+  id: number;
+  user_id: number;
+  supplement_id: number;
+  taken_at: string;
+  dose_taken?: number;
+  notes?: string;
+}
+
+export interface SupplementCreate {
+  name: string;
+  dosage: number;
+  unit: string;
+  frequency: string;
+  scheduled_times: string[];
+  notes?: string;
+}
+
+export interface SupplementUpdate {
+  name?: string;
+  dosage?: number;
+  unit?: string;
+  frequency?: string;
+  scheduled_times?: string[];
+  notes?: string;
+  is_active?: boolean;
+}

frontend/src/types/user.ts

@@ -0,0 +1,33 @@
+export interface User {
+  id: number;
+  email: string;
+  username: string;
+  firstname?: string;
+  lastname?: string;
+  age?: number;
+  gender?: string;
+  height?: number;
+  weight?: number;
+  unit_preference: string;
+  target_calories?: number;
+  target_protein?: number;
+  target_carbs?: number;
+  target_fat?: number;
+}
+
+export interface UserUpdate {
+  email?: string;
+  username?: string;
+  password?: string;
+  firstname?: string;
+  lastname?: string;
+  age?: number;
+  gender?: string;
+  height?: number;
+  weight?: number;
+  unit_preference?: string;
+  target_calories?: number;
+  target_protein?: number;
+  target_carbs?: number;
+  target_fat?: number;
+}

frontend/vite.config.ts

@@ -2,11 +2,34 @@ import { defineConfig } from 'vite';
 import react from '@vitejs/plugin-react-swc';
 import tailwindcss from '@tailwindcss/vite';
 import path from 'path';
+import { VitePWA } from 'vite-plugin-pwa';
 
 export default defineConfig({
   plugins: [
     react(),
     tailwindcss(),
+    VitePWA({
+      registerType: 'autoUpdate',
+      strategies: 'injectManifest',
+      srcDir: 'src',
+      filename: 'sw.ts',
+      manifest: {
+        name: 'HealthyFit',
+        short_name: 'HealthyFit',
+        description: 'AI-powered health & fitness tracker',
+        theme_color: '#556B2F',
+        background_color: '#FDFBF7',
+        display: 'standalone',
+        start_url: '/',
+        icons: [
+          { src: '/icons/icon-192.png', sizes: '192x192', type: 'image/png' },
+          { src: '/icons/icon-512.png', sizes: '512x512', type: 'image/png', purpose: 'any maskable' },
+        ],
+      },
+      injectManifest: {
+        globPatterns: [], // no precaching — push handling only
+      },
+    }),
   ],
   resolve: {
     alias: {