Add accounts expansion, analytics, exchange rates, API tokens, PWA support, and UI overhaul

- Expand Account model with account_type (pension, savings, liability, crypto), new banks/currencies (BTC, XMR, FCL, ROP, VOL, MEMP, MPAT, MORTGAGE), and next_payment field
- Add exchange rate endpoint (BCCR integration), analytics endpoint, paste-import for transactions, and API token management
- Add PWA manifest, service worker, and app icons
- Redesign dashboard, transactions, transfers, and login pages with theme support
- Add billing cycle selector, confirm dialog, and paste import modal components
- One-time DB reset in deploy workflow for schema migration

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

backend/app/models/models.py

@@ -19,12 +19,28 @@ class TransactionSource(str, enum.Enum):
 class Currency(str, enum.Enum):
     CRC = "CRC"
     USD = "USD"
+    BTC = "BTC"
+    XMR = "XMR"
 
 
 class Bank(str, enum.Enum):
     BAC = "BAC"
     BCR = "BCR"
     DAVIVIENDA = "DAVIVIENDA"
+    FCL = "FCL"
+    ROP = "ROP"
+    VOL = "VOL"
+    MEMP = "MEMP"
+    MPAT = "MPAT"
+    MORTGAGE = "MORTGAGE"
+
+
+class AccountType(str, enum.Enum):
+    BANK = "BANK"
+    PENSION = "PENSION"
+    CRYPTO = "CRYPTO"
+    SAVINGS = "SAVINGS"
+    LIABILITY = "LIABILITY"
 
 
 # --- Category ---
@@ -64,8 +80,10 @@ class CategoryUpdate(SQLModel):
 class AccountBase(SQLModel):
     bank: Bank
     currency: Currency
-    label: str = Field(description="e.g. 'BAC Colones', 'BAC Dólares'")
+    label: str
     balance: float = 0.0
+    account_type: AccountType = AccountType.BANK
+    next_payment: Optional[float] = None
 
 
 class Account(AccountBase, table=True):
@@ -85,6 +103,7 @@ class AccountRead(AccountBase):
 class AccountUpdate(SQLModel):
     balance: Optional[float] = None
     label: Optional[str] = None
+    next_payment: Optional[float] = None
 
 
 # --- Transaction ---
@@ -99,7 +118,7 @@ class TransactionBase(SQLModel):
     card_type: Optional[str] = None
     card_last4: Optional[str] = None
     authorization_code: Optional[str] = None
-    reference: Optional[str] = None
+    reference: Optional[str] = Field(default=None, index=True)
     transaction_type: TransactionType = TransactionType.COMPRA
     source: TransactionSource = TransactionSource.CREDIT_CARD
     bank: Bank = Bank.BAC
@@ -133,3 +152,46 @@ class TransactionUpdate(SQLModel):
     source: Optional[TransactionSource] = None
     notes: Optional[str] = None
     category_id: Optional[int] = None
+
+
+# --- Exchange Rate ---
+
+
+class ExchangeRate(SQLModel, table=True):
+    id: Optional[int] = Field(default=None, primary_key=True)
+    date: datetime
+    buy_rate: float
+    sell_rate: float
+    fetched_at: datetime = Field(default_factory=datetime.utcnow)
+
+
+class ExchangeRateRead(SQLModel):
+    buy_rate: float
+    sell_rate: float
+    date: datetime
+    fetched_at: datetime
+
+
+# --- API Token ---
+
+
+class APIToken(SQLModel, table=True):
+    id: Optional[int] = Field(default=None, primary_key=True)
+    name: str
+    token_hash: str = Field(index=True)
+    created_at: datetime = Field(default_factory=datetime.utcnow)
+    expires_at: Optional[datetime] = None
+    is_active: bool = True
+
+
+class APITokenCreate(SQLModel):
+    name: str
+    expires_days: Optional[int] = None
+
+
+class APITokenRead(SQLModel):
+    id: int
+    name: str
+    created_at: datetime
+    expires_at: Optional[datetime]
+    is_active: bool