Fix: Staging-Media — PROD_MEDIA_DIR Fallback statt überlappende Docker-Volumes

backend/main.py

@@ -279,9 +279,26 @@ app.mount("/icons", StaticFiles(directory=f"{STATIC_DIR}/icons"),  name="icons")
 app.mount("/img",   StaticFiles(directory=f"{STATIC_DIR}/img"),    name="img")
 
 # User-generierte Medien (Fotos aus Tagebuch, Giftköder-Alarm, etc.)
-MEDIA_DIR = os.getenv("MEDIA_DIR", "/data/media")
+MEDIA_DIR      = os.getenv("MEDIA_DIR", "/data/media")
+PROD_MEDIA_DIR = os.getenv("PROD_MEDIA_DIR", "")   # Staging-only: Fallback auf Prod-Media
 os.makedirs(MEDIA_DIR, exist_ok=True)
-app.mount("/media", StaticFiles(directory=MEDIA_DIR), name="media")
+
+if PROD_MEDIA_DIR:
+    # Staging: erst eigenes media-Verzeichnis, dann Prod-Fallback
+    from pathlib import Path as _Path
+    from starlette.responses import FileResponse as _FileResponse
+
+    @app.get("/media/{path:path}")
+    async def serve_media(path: str):
+        p = _Path(MEDIA_DIR) / path
+        if p.is_file():
+            return _FileResponse(str(p))
+        pp = _Path(PROD_MEDIA_DIR) / path
+        if pp.is_file():
+            return _FileResponse(str(pp))
+        raise HTTPException(404, "Media not found")
+else:
+    app.mount("/media", StaticFiles(directory=MEDIA_DIR), name="media")
 
 @app.get("/robots.txt")
 async def robots():

docker-compose.staging.yml

@@ -7,12 +7,13 @@ services:
       - "3012:8000"
     volumes:
       - ./data:/data
-      - /volume1/docker/banyaro/data/media:/data/media:ro
+      - /volume1/docker/banyaro/data/media:/prod-media:ro
     env_file:
       - .env
     environment:
       - DB_PATH=/data/banyaro.db
       - MEDIA_DIR=/data/media
+      - PROD_MEDIA_DIR=/prod-media
       - STAGING=true
       - VAPID_PUBLIC_KEY=BMKbFAmpsqJ-eFef_4XJcYpuxPWqBNAoy9buMNnMSa6ijcPzltboHi_YccPKJrUD0isBez-vJIzAgjnLTWkzcC0
       - VAPID_PRIVATE_KEY=8PWa9vvwMqtqsJEJGcwmiLhR0_Yl7duVX3wmWiKS878