Initial public release

Aurum — a self-hosted personal finance operating system: cash flow,
net worth tracking, budgets, goals, recurring payments, reports,
proactive alerts, and a compound-interest returns calculator, all
bilingual (RU/EN) and mobile-first. Ships as a three-container Docker
Compose stack (Postgres + FastAPI + nginx-served React frontend).

See README.md for setup and CONTRIBUTING.md for development.

backend/app/schemas/settings.py

@@ -0,0 +1,26 @@
+from pydantic import BaseModel, Field
+
+
+class AppSettingsRead(BaseModel):
+    currency: str
+    negative_cash_flow_threshold_months: int
+    net_worth_decline_threshold_months: int
+    risky_allocation_threshold_percent: int
+
+
+class AppSettingsUpdate(BaseModel):
+    """All fields optional — the route applies a partial update
+    (`exclude_unset`), same as CategoryUpdate, so a single-field PATCH from
+    e.g. CurrencyCard doesn't need to resend the alert thresholds."""
+
+    # ISO 4217 code, e.g. "USD"/"UAH"/"EUR" — the frontend only ever sends
+    # values from its curated currency list, but validate the shape anyway
+    # since Intl.NumberFormat would otherwise silently accept garbage.
+    currency: str | None = Field(default=None, min_length=3, max_length=3, pattern=r"^[A-Z]{3}$")
+    # Consecutive complete months before the corresponding alert fires.
+    # Capped at 24 to match insights_service.py's MAX_LOOKBACK_MONTHS.
+    negative_cash_flow_threshold_months: int | None = Field(default=None, ge=1, le=24)
+    net_worth_decline_threshold_months: int | None = Field(default=None, ge=1, le=24)
+    # Max % of capital allowed in medium/high risk tiers (the 80/20 rule's
+    # "20% at most exposed" half) before risky_allocation_exceeded fires.
+    risky_allocation_threshold_percent: int | None = Field(default=None, ge=1, le=100)