Initial commit: MyMidas personal finance tracker

Full-stack self-hosted finance app with FastAPI backend and React frontend.

Features:
- Accounts, transactions, budgets, investments with GBP base currency
- CSV import with auto-detection for 10 UK bank formats
- ML predictions: spending forecast, net worth projection, Monte Carlo
- 7 selectable themes (Obsidian, Arctic, Midnight, Vault, Terminal, Synthwave, Ledger)
- Receipt/document attachments on transactions (JPEG, PNG, WebP, PDF)
- AES-256-GCM field encryption, RS256 JWT, TOTP 2FA, RLS, audit log
- Encrypted nightly backups + key rotation script
- Mobile-responsive layout with bottom nav

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/app/schemas/transaction.py

@@ -0,0 +1,77 @@
+import uuid
+from datetime import date as DateType, datetime
+from decimal import Decimal
+from typing import Literal
+
+from pydantic import BaseModel, Field
+
+TransactionType = Literal["income", "expense", "transfer", "investment"]
+TransactionStatus = Literal["pending", "cleared", "reconciled", "void"]
+
+
+class TransactionCreate(BaseModel):
+    account_id: uuid.UUID
+    transfer_account_id: uuid.UUID | None = None
+    category_id: uuid.UUID | None = None
+    type: TransactionType
+    status: TransactionStatus = "cleared"
+    amount: Decimal
+    currency: str = Field(default="GBP", min_length=3, max_length=10)
+    date: DateType
+    description: str = Field(..., min_length=1, max_length=500)
+    merchant: str | None = None
+    notes: str | None = None
+    tags: list[str] = []
+    is_recurring: bool = False
+    recurring_rule: dict | None = None
+
+
+class TransactionUpdate(BaseModel):
+    category_id: uuid.UUID | None = None
+    status: TransactionStatus | None = None
+    amount: Decimal | None = None
+    date: DateType | None = None
+    description: str | None = Field(default=None, min_length=1, max_length=500)
+    merchant: str | None = None
+    notes: str | None = None
+    tags: list[str] | None = None
+
+
+class TransactionFilter(BaseModel):
+    account_id: uuid.UUID | None = None
+    category_id: uuid.UUID | None = None
+    type: TransactionType | None = None
+    status: TransactionStatus | None = None
+    date_from: DateType | None = None
+    date_to: DateType | None = None
+    min_amount: Decimal | None = None
+    max_amount: Decimal | None = None
+    search: str | None = None
+    tags: list[str] = []
+    page: int = Field(default=1, ge=1)
+    page_size: int = Field(default=50, ge=1, le=200)
+
+
+class TransactionResponse(BaseModel):
+    id: uuid.UUID
+    account_id: uuid.UUID
+    transfer_account_id: uuid.UUID | None
+    category_id: uuid.UUID | None
+    type: str
+    status: str
+    amount: Decimal
+    amount_base: Decimal | None
+    currency: str
+    base_currency: str
+    exchange_rate: Decimal | None
+    date: DateType
+    description: str
+    merchant: str | None
+    notes: str | None
+    tags: list[str]
+    is_recurring: bool
+    attachment_refs: list[dict] = []
+    created_at: datetime
+    updated_at: datetime
+
+    model_config = {"from_attributes": True}