CONTROL-001: add safe HA automation handoff

app/main.py

@@ -77,7 +77,7 @@ async def lifespan(app: FastAPI) -> AsyncIterator[None]:
 app = FastAPI(
     title="SillyHome Next API",
     description="Lokales Smart-Home-Intelligenzsystem für Home Assistant.",
-    version="0.5.2",
+    version="0.7.0",
     lifespan=lifespan,
 )
 app.state.settings = load_settings()
@@ -97,7 +97,10 @@ def health() -> dict[str, str]:
 
 @app.get("/")
 def root() -> FileResponse:
-    return FileResponse(STATIC_DIR / "index.html")
+    return FileResponse(
+        STATIC_DIR / "index.html",
+        headers={"Cache-Control": "no-store, max-age=0"},
+    )
 
 
 async def _periodic_reconciliation(app: FastAPI) -> None: