feat: add gallery page with image and video details, including upload and generation status

Co-authored-by: Copilot <copilot@github.com>

backend/app/routers/generate.py

@@ -186,6 +186,56 @@ async def list_generated_images(
     ]
 
 
+@router.get("/images/{image_id}")
+async def get_generated_image(
+    image_id: str,
+    current_user: dict = Depends(get_current_user),
+) -> dict:
+    """Return details for a single generated image."""
+    user_id = current_user.get("id") or current_user.get("sub")
+    conn = get_conn()
+    row = conn.execute(
+        """SELECT id, model_id, prompt, image_data, created_at
+           FROM generated_images
+           WHERE id = ? AND user_id = ?""",
+        [image_id, user_id],
+    ).fetchone()
+    if not row:
+        raise HTTPException(status_code=404, detail="Image not found")
+    return {
+        "id": str(row[0]),
+        "model_id": row[1],
+        "prompt": row[2],
+        "image_data": row[3],
+        "created_at": row[4].isoformat() if row[4] else None,
+    }
+
+
+@router.get("/images/{image_id}")
+async def get_generated_image(
+    image_id: str,
+    current_user: dict = Depends(get_current_user),
+) -> dict:
+    """Return details for a single generated image."""
+    user_id = current_user.get("id") or current_user.get("sub")
+    conn = get_conn()
+    row = conn.execute(
+        """SELECT id, model_id, prompt, image_data, created_at
+           FROM generated_images
+           WHERE id = ? AND user_id = ?""",
+        [image_id, user_id],
+    ).fetchone()
+    if not row:
+        raise HTTPException(status_code=404, detail="Image not found")
+    return {
+        "id": str(row[0]),
+        "model_id": row[1],
+        "prompt": row[2],
+        "image_data": row[3],
+        "created_at": row[4].isoformat() if row[4] else None,
+    }
+
+
 @router.post("/video", response_model=VideoResponse)
 async def generate_video(
     body: VideoRequest,
@@ -358,3 +408,32 @@ async def list_generated_videos(
         }
         for r in rows
     ]
+
+
+@router.get("/videos/{video_id}")
+async def get_generated_video(
+    video_id: str,
+    current_user: dict = Depends(get_current_user),
+) -> dict:
+    """Return details for a single video generation job."""
+    user_id = current_user.get("id") or current_user.get("sub")
+    conn = get_conn()
+    row = conn.execute(
+        """SELECT id, job_id, model_id, prompt, polling_url, status, video_url, created_at, updated_at
+           FROM generated_videos
+           WHERE id = ? AND user_id = ?""",
+        [video_id, user_id],
+    ).fetchone()
+    if not row:
+        raise HTTPException(status_code=404, detail="Video job not found")
+    return {
+        "id": str(row[0]),
+        "job_id": row[1],
+        "model_id": row[2],
+        "prompt": row[3],
+        "polling_url": row[4],
+        "status": row[5],
+        "video_url": row[6],
+        "created_at": row[7].isoformat() if row[7] else None,
+        "updated_at": row[8].isoformat() if row[8] else None,
+    }