feat: timeline and folder import

frontend/src/components/dialogs/AddSourceFolderDialog.tsx

@@ -84,7 +84,7 @@ export function AddSourceFolderDialog({ isOpen, onClose, onAdd }: AddSourceFolde
               type="text"
               value={folderPath}
               onChange={(e) => setFolderPath(e.target.value)}
-              placeholder="/path/to/photos"
+              placeholder="/host/Pictures/your-folder"
               disabled={isLoading}
               className={clsx(
                 'w-full rounded border bg-bg px-3 py-2 text-sm text-text placeholder-text-faint',
@@ -93,9 +93,17 @@ export function AddSourceFolderDialog({ isOpen, onClose, onAdd }: AddSourceFolde
                 error ? 'border-reject' : 'border-border'
               )}
             />
-            <p className="mt-1 text-xs text-text-muted">
-              Enter the full path to the folder containing your photos
-            </p>
+            <div className="mt-1 space-y-1">
+              <p className="text-xs text-text-muted">
+                Use container paths. Your Pictures folder is available at:
+              </p>
+              <code className="block text-xs bg-surface-2 px-2 py-1 rounded text-primary">
+                /host/Pictures/
+              </code>
+              <p className="text-xs text-text-faint">
+                Example: /host/Pictures/MulitaTest
+              </p>
+            </div>
           </div>
 
           {/* Recursive Checkbox */}