feat: improve audio clip URL handling after upload

- Added URL switching from blob to server URL after successful clip upload
- Implemented memory cleanup by revoking blob URLs when no longer needed
- Updated clip state to include server-generated URL using bucket and key data
- Improved error handling to preserve existing URL if server doesn't return storage data

apps/admin/src/features/recorder/Recorder.tsx

@@ -82,7 +82,27 @@ export default function Recorder({ postId, initialClips, onInsertAtCursor, onTra
           throw new Error(`Upload failed: ${res.status} ${txt}`);
         }
         const data = await res.json();
-        setClips((prev) => prev.map(x => x.id === id ? { ...x, id: (data.clipId || x.id), uploadedKey: data.key || 'uploaded', uploadedBucket: data.bucket || null, isUploading: false } : x));
+        // Update clip with server data and switch to server URL
+        const serverUrl = data.bucket && data.key 
+          ? `/api/media/obj?bucket=${encodeURIComponent(data.bucket)}&key=${encodeURIComponent(data.key)}`
+          : undefined;
+        setClips((prev) => prev.map(x => {
+          if (x.id === id) {
+            // Revoke old blob URL to free memory
+            if (x.url && x.url.startsWith('blob:')) {
+              URL.revokeObjectURL(x.url);
+            }
+            return { 
+              ...x, 
+              id: (data.clipId || x.id), 
+              uploadedKey: data.key || 'uploaded', 
+              uploadedBucket: data.bucket || null, 
+              url: serverUrl || x.url, // Use server URL after upload
+              isUploading: false 
+            };
+          }
+          return x;
+        }));
       } catch (e: any) {
         setClips((prev) => prev.map(x => x.id === id ? { ...x, error: e?.message || 'Upload failed', isUploading: false } : x));
       }