Add Drive-backed project storage and asset upload

gateway.py

@@ -1498,3 +1498,49 @@ if __name__ == "__main__":
   Groq     : {"✅" if GROQ_KEY     else "❌ set GROQ_API_KEY"}
 """)
     uvicorn.run(app, host="0.0.0.0", port=PORT)
+
+# ── Drive-backed storage (added for builder-app / admin-app) ──
+from fastapi import UploadFile, File
+from googleapiclient.discovery import build
+from googleapiclient.http import MediaIoBaseUpload
+from google.oauth2 import service_account
+import io, json, os
+
+DRIVE_FOLDER_ID = os.environ["DRIVE_FOLDER_ID"]
+_creds = service_account.Credentials.from_service_account_info(
+    json.loads(os.environ["GOOGLE_SERVICE_ACCOUNT_JSON"]),
+    scopes=["https://www.googleapis.com/auth/drive"]
+)
+drive = build("drive", "v3", credentials=_creds)
+
+@app.post("/v1/projects/{page_id}")
+async def save_project(page_id: str, body: dict):
+    fname = f"{page_id}.json"
+    media = MediaIoBaseUpload(io.BytesIO(json.dumps(body).encode()), mimetype="application/json")
+    existing = drive.files().list(q=f"name='{fname}' and '{DRIVE_FOLDER_ID}' in parents").execute()
+    if existing["files"]:
+        drive.files().update(fileId=existing["files"][0]["id"], media_body=media).execute()
+    else:
+        drive.files().create(body={"name": fname, "parents": [DRIVE_FOLDER_ID]}, media_body=media).execute()
+    return {"status": "ok"}
+
+@app.get("/v1/projects/{page_id}")
+async def load_project(page_id: str):
+    fname = f"{page_id}.json"
+    res = drive.files().list(q=f"name='{fname}' and '{DRIVE_FOLDER_ID}' in parents").execute()
+    if not res["files"]:
+        return {"data": {}}
+    content = drive.files().get_media(fileId=res["files"][0]["id"]).execute()
+    return {"data": json.loads(content)}
+
+@app.post("/v1/assets/upload")
+async def upload_asset(files: list[UploadFile] = File(...)):
+    urls = []
+    for f in files:
+        media = MediaIoBaseUpload(io.BytesIO(await f.read()), mimetype=f.content_type)
+        created = drive.files().create(
+            body={"name": f.filename, "parents": [DRIVE_FOLDER_ID]}, media_body=media, fields="id"
+        ).execute()
+        drive.permissions().create(fileId=created["id"], body={"role": "reader", "type": "anyone"}).execute()
+        urls.append(f"https://drive.google.com/uc?id={created['id']}")
+    return {"data": [{"src": u} for u in urls]}

requirements.txt

@@ -5,3 +5,5 @@ beautifulsoup4
 python-dotenv
 colorthief
 pillow
+google-api-python-client
+google-auth