fix: use order-independent tag matching in asset browser categories (#9843)

## Summary

Fix asset browser sidebar missing categories because `typeCategories`
assumed a fixed tag order from the API.

## Changes

- **What**: Replace `tags[0] === 'models'` / `tags[1]` with
`tags.includes(MODELS_TAG)` and `flatMap`+`filter`, matching the pattern
used by `getAssetModelFolders` and `filterByCategory`.

## Review Focus

The API returns tags in arbitrary order (e.g. `['checkpoints',
'models']` instead of `['models', 'checkpoints']`). The old code
filtered out most assets, resulting in an empty sidebar. New test
validates arbitrary tag ordering.

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-9843-fix-use-order-independent-tag-matching-in-asset-browser-categories-3216d73d365081b886f3d5ab1790e19d)
by [Unito](https://www.unito.io)

Co-authored-by: Amp <amp@ampcode.com>

src/platform/assets/composables/useAssetBrowser.test.ts

@@ -692,6 +692,25 @@ describe('useAssetBrowser', () => {
       ])
     })
 
+    it('extracts categories regardless of tag order', () => {
+      const assets = [
+        createApiAsset({ tags: ['checkpoints', 'models'] }),
+        createApiAsset({ tags: ['loras', 'models'] }),
+        createApiAsset({ tags: ['models', 'vae'] })
+      ]
+
+      const { navItems } = useAssetBrowser(ref(assets))
+
+      const typeGroup = navItems.value[2] as {
+        items: { id: string }[]
+      }
+      expect(typeGroup.items.map((i) => i.id)).toEqual([
+        'checkpoints',
+        'loras',
+        'vae'
+      ])
+    })
+
     it('ignores non-models root tags', () => {
       const assets = [
         createApiAsset({ tags: ['input', 'images'] }),

src/platform/assets/composables/useAssetBrowser.ts

@@ -21,6 +21,7 @@ import {
   getAssetBaseModels,
   getAssetFilename
 } from '@/platform/assets/utils/assetMetadataUtils'
+import { MODELS_TAG } from '@/platform/assets/services/assetService'
 import { sortAssets } from '@/platform/assets/utils/assetSortUtils'
 import { useAssetDownloadStore } from '@/stores/assetDownloadStore'
 import type { NavGroupData, NavItemData } from '@/types/navTypes'
@@ -123,9 +124,10 @@ export function useAssetBrowser(
 
   const typeCategories = computed<NavItemData[]>(() => {
     const categories = assets.value
-      .filter((asset) => asset.tags[0] === 'models')
-      .map((asset) => asset.tags[1])
-      .filter((tag): tag is string => typeof tag === 'string' && tag.length > 0)
+      .filter((asset) => asset.tags.includes(MODELS_TAG))
+      .flatMap((asset) =>
+        asset.tags.filter((tag) => tag !== MODELS_TAG && tag.length > 0)
+      )
       .map((tag) => tag.split('/')[0])
 
     return Array.from(new Set(categories))