Udate config for stats

backend/app/main.py

@@ -124,4 +124,24 @@ app.include_router(router, prefix="/api")
 # Serve frontend static files if they exist (production / Docker)
 static_dir = Path(__file__).resolve().parent.parent / "static"
 if static_dir.is_dir():
+    # Catch-all SPA fallback: serve index.html for any non-API, non-asset path.
+    # This must be registered BEFORE the static mount so /backgrounds, /bookmarks,
+    # /stats etc. return 200 + index.html instead of 404.
+    from fastapi.responses import FileResponse as _FileResponse
+    import re as _re
+
+    _ASSET_RE = _re.compile(r"\.(js|css|png|jpg|jpeg|gif|svg|ico|woff2?|ttf|map|json|webmanifest)$", _re.I)
+
+    @app.get("/{full_path:path}", include_in_schema=False)
+    async def spa_fallback(full_path: str):
+        # Let actual static asset requests fall through to the mount below
+        if _ASSET_RE.search(full_path):
+            from starlette.responses import Response
+            return Response(status_code=404)
+        index = static_dir / "index.html"
+        if index.is_file():
+            return _FileResponse(str(index))
+        from starlette.responses import Response
+        return Response(status_code=404)
+
     app.mount("/", StaticFiles(directory=str(static_dir), html=True), name="static")