Initial income_calculator project

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/main.py

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+from pathlib import Path
+
+from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
+from fastapi.staticfiles import StaticFiles
+
+from backend.api import accounts, balance, banks, charts, import_api, settings_api
+from backend.db.database import init_db
+
+init_db()
+
+app = FastAPI(title="Income Calculator", version="0.1.0")
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["*"],
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+app.include_router(banks.router)
+app.include_router(accounts.router)
+app.include_router(import_api.router)
+app.include_router(balance.router)
+app.include_router(charts.router)
+app.include_router(settings_api.router)
+
+# Статика Vue (собранная в frontend/dist)
+static_path = Path(__file__).resolve().parent.parent / "frontend" / "dist"
+if static_path.exists():
+    app.mount("/assets", StaticFiles(directory=static_path / "assets"), name="assets")
+
+    @app.get("/")
+    def index():
+        from fastapi.responses import FileResponse
+        return FileResponse(static_path / "index.html")
+
+    @app.get("/{full_path:path}")
+    def serve_spa(full_path: str):
+        from fastapi.responses import FileResponse
+        if full_path.startswith("api/"):
+            return FileResponse(static_path / "index.html")  # let API handle; this won't be hit
+        f = static_path / full_path
+        if f.is_file():
+            return FileResponse(f)
+        return FileResponse(static_path / "index.html")
+else:
+    @app.get("/")
+    def root():
+        return {"message": "Backend running. Build frontend: cd frontend && npm run build"}