Cleanup for ALL ruff checks, and re-ruff to target project settings when installing templates, avoiding formatting errors after patching.

template/backend/__init__.py

@@ -0,0 +1 @@
+"""Backend package with FastAPI application and Vue frontend integration."""

template/backend/__main__.py

@@ -1,4 +1,6 @@
 # auto-upgrade@fastapi-vue-setup - remove this if you modify this file
+"""Command-line entry point for running the backend server."""
+
 import argparse
 import os
 
@@ -8,7 +10,8 @@ DEFAULT_PORT = TEMPLATE_DEFAULT_PORT
 DEVMODE = os.getenv("ENVPREFIX_DEV") == "1"
 
 
-def main():
+def main() -> None:
+    """Run the backend server with optional arguments."""
     parser = argparse.ArgumentParser(description="Run the MODULE_NAME server.")
     parser.add_argument(
         "-l",

template/backend/app.py

@@ -1,3 +1,6 @@
+"""FastAPI application module with Vue frontend integration."""
+
+from collections.abc import AsyncIterator
 from contextlib import asynccontextmanager
 from pathlib import Path
 
@@ -10,7 +13,7 @@ frontend = Frontend(Path(__file__).with_name("frontend-build"))
 
 
 @asynccontextmanager
-async def lifespan(app: FastAPI):
+async def lifespan(_app: FastAPI) -> AsyncIterator[None]:
     """Manage app startup and shutdown resources."""
     await frontend.load()
     yield
@@ -24,7 +27,8 @@ app = FastAPI(title="PROJECT_TITLE", debug=DEVMODE, lifespan=lifespan)
 
 # Health check endpoint for the Vue demo app to verify the backend is running
 @app.get("/api/health")
-async def health_check():
+async def health_check() -> dict[str, str]:
+    """Return backend status for health monitoring."""
     return {"status": "ok"}