feat: Add sort functionality to Media Asset Panel (#6695)

## Overview
Adds sort functionality to the Media Asset Panel. Users can sort assets
by creation time in Cloud environments.

## Key Changes

### 1. Sort Functionality (Cloud Only)
- "Newest first" (most recent)
- "Oldest first" (oldest)
- Sorting based on `create_time` field (output assets)
- Sorting based on `created_at` field (input assets)
- Sort button is only displayed in Cloud environments

### 2. create_time Field Integration
**Related PR**: #6092

Implemented sort functionality using the `create_time` field introduced
in PR #6092. Applied the code from that PR directly to the following
files:

- `src/schemas/apiSchema.ts`: Added `create_time` field to `zExtraData`
- `src/stores/queueStore.ts`: Added `createTime` getter to
`TaskItemImpl`
- `src/platform/remote/comfyui/history/types/historyV2Types.ts`: Added
`create_time` to History V2 API response types
- `src/platform/remote/comfyui/history/adapters/v2ToV1Adapter.ts`: Pass
through `create_time` in V2→V1 adapter
- `src/platform/assets/composables/media/assetMappers.ts`: Include
`create_time` in asset metadata

### 3. Component Structure Improvements
Created new components following existing component styles for
consistency:

- **`MediaAssetSearchBar.vue`**: Component combining existing SearchBox
with sort button
- **`AssetSortButton.vue`**: Same structure as `MoreButton.vue`
(IconButton + Popover)
- **`MediaAssetSortMenu.vue`**: Same style as `MediaAssetMoreMenu.vue`
(using IconTextButton)
- **`AssetsSidebarTab.vue`**: Refactored to use `MediaAssetSearchBar`

### 4. Utility Usage
- Improved sort logic using `es-toolkit`'s `sortBy`
- Follows project guidelines (CLAUDE.md)

## Technical Details

### History V2 API's create_time
- Cloud backend provides `create_time` (in milliseconds) through History
V2 API
- Enables accurate sorting by creation time
- For input assets, uses existing `created_at` (ISO string)

### Sort Implementation
Uses `es-toolkit`'s `sortBy` in `useMediaAssetFiltering` composable:

```typescript
// Get timestamp from asset (either create_time or created_at)
const getAssetTime = (asset: AssetItem): number => {
  return (
    (asset.user_metadata?.create_time as number) ??
    (asset.created_at ? new Date(asset.created_at).getTime() : 0)
  )
}

// Sort by time
if (sortBy.value === 'oldest') {
  return sortByUtil(searchFiltered.value, [getAssetTime])
} else {
  return sortByUtil(searchFiltered.value, [(asset) => -getAssetTime(asset)])
}
```

## Testing
- ✅ Typecheck passed
- ✅ Lint passed
- ✅ Format passed

🤖 Generated with [Claude Code](https://claude.com/claude-code)

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6695-feat-Add-sort-functionality-to-Media-Asset-Panel-2ab6d73d3650818c818ff3559875d869)
by [Unito](https://www.unito.io)

Co-authored-by: Claude <noreply@anthropic.com>

src/stores/queueStore.ts

@@ -313,6 +313,22 @@ export class TaskItemImpl {
     return this.status?.messages || []
   }
 
+  /**
+   * Server-provided creation time in milliseconds, when available.
+   *
+   * Sources:
+   * - Queue: 5th tuple element may be a metadata object with { create_time }.
+   * - History (Cloud V2): Adapter injects create_time into prompt[3].extra_data.
+   */
+  get createTime(): number | undefined {
+    const extra = (this.extraData as any) || {}
+    const fromExtra =
+      typeof extra.create_time === 'number' ? extra.create_time : undefined
+    if (typeof fromExtra === 'number') return fromExtra
+
+    return undefined
+  }
+
   get interrupted() {
     return _.some(
       this.messages,