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>

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)