fix serve pwa

api.py

@@ -711,6 +711,15 @@ def app_config():
     return JSONResponse(content=get_public_app_config())
 
 
+def _serve_pwa_index() -> HTMLResponse:
+    pwa_index = PWA_DIST_DIR / "index.html"
+    if pwa_index.exists():
+        return HTMLResponse(pwa_index.read_text(encoding="utf-8"))
+
+    with open(os.path.join(os.path.dirname(__file__), "ui.html"), encoding="utf-8") as f:
+        return HTMLResponse(f.read())
+
+
 class PlantChatRequest(BaseModel):
     plant_name: str = Field(..., min_length=2, description="Nome comune o scientifico della pianta")
     question: str = Field(..., min_length=3, description="Domanda sulla cura della pianta")
@@ -1215,12 +1224,22 @@ def species_common_names(
 
 @app.get("/", response_class=HTMLResponse)
 def ui():
-    pwa_index = PWA_DIST_DIR / "index.html"
-    if pwa_index.exists():
-        return pwa_index.read_text(encoding="utf-8")
+    return _serve_pwa_index()
 
-    with open(os.path.join(os.path.dirname(__file__), "ui.html"), encoding="utf-8") as f:
-        return f.read()
+
+@app.get("/{path:path}", include_in_schema=False)
+def spa_fallback(path: str):
+    if not PWA_DIST_DIR.exists() or not PWA_DIST_DIR.is_dir():
+        raise HTTPException(status_code=404, detail="Frontend non disponibile.")
+
+    requested = (PWA_DIST_DIR / path).resolve()
+    try:
+        if requested.is_file() and str(requested).startswith(str(PWA_DIST_DIR.resolve())):
+            return FileResponse(requested)
+    except Exception:
+        pass
+
+    return _serve_pwa_index()
 
 
 @app.get("/images/{full_path:path}")
@@ -1581,11 +1600,6 @@ def plant_care_chat(payload: PlantChatRequest, authorization: str | None = Heade
     return JSONResponse(content=response_payload)
 
 
-# Mount the production frontend build for single-service deployments (e.g. Hugging Face Spaces).
-if PWA_DIST_DIR.exists() and PWA_DIST_DIR.is_dir():
-    app.mount("/", StaticFiles(directory=str(PWA_DIST_DIR), html=True), name="pwa")
-
-
 if __name__ == "__main__":
     import uvicorn