fix: support text and misc generated asset states (#8914)

## Summary
Align generated-asset state classification to a single shared source and
implement the missing text/misc states in both card and list previews.

## Changes
- **What**:
- Extended `getMediaTypeFromFilename` in
`packages/shared-frontend-utils` to return `text` and `other`, and
changed unknown/no-extension fallback from `image` to `other`.
- Added text extension handling (`txt`, `md`, `json`, `csv`, `yaml/yml`,
`xml`, `log`) and kept existing media kinds.
- Updated generated-assets UI to use shared media-type detection
directly (removed the local generated-assets classifier).
  - Added text and misc card preview components:
    - `text` -> `icon-[lucide--text]`
    - `other` -> `icon-[lucide--check-check]`
- Updated list-item preview behavior so only `image`/`video` use preview
media URLs; `text`/`other` use icon fallback.
- Widened media kind schema for asset display metadata to include `text`
and `other`.
- **Breaking**: No API breaking changes; internal media kind union
widened for frontend asset display paths.
- **Dependencies**: None.

## Review Focus
- Verify generated text assets render paragraph/text icon state in card
+ list.
- Verify unknown/misc assets consistently render double-check icon state
in card + list.
- Verify existing image/video/audio/3D behavior remains unchanged.

## Screenshots (if applicable)
<img width="282" height="158" alt="image"
src="https://github.com/user-attachments/assets/76cf2d1b-9d34-4c7c-92a1-50bbc55871e5"
/>
<img width="432" height="489" alt="image"
src="https://github.com/user-attachments/assets/024fece3-f241-484d-a37e-11948559ebbc"
/>
<img width="421" height="494" alt="image"
src="https://github.com/user-attachments/assets/ed64ba0c-bf46-4c3b-996e-4bc613ee029e"
/>


┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-8914-fix-support-text-and-misc-generated-asset-states-3096d73d365081f28ca7c32f306e4b50)
by [Unito](https://www.unito.io)

---------

Co-authored-by: Johnpaul Chiwetelu <49923152+Myestery@users.noreply.github.com>
Co-authored-by: GitHub Action <action@github.com>

src/components/sidebar/tabs/AssetsSidebarTab.vue

@@ -204,13 +204,22 @@ import {
 } from '@vueuse/core'
 import Divider from 'primevue/divider'
 import { useToast } from 'primevue/usetoast'
-import { computed, nextTick, onMounted, onUnmounted, ref, watch } from 'vue'
+import {
+  computed,
+  defineAsyncComponent,
+  nextTick,
+  onMounted,
+  onUnmounted,
+  ref,
+  watch
+} from 'vue'
 import { useI18n } from 'vue-i18n'
 
 import NoResultsPlaceholder from '@/components/common/NoResultsPlaceholder.vue'
 // Lazy-loaded to avoid pulling THREE.js into the main bundle
-const Load3dViewerContent = () =>
-  import('@/components/load3d/Load3dViewerContent.vue')
+const Load3dViewerContent = defineAsyncComponent(
+  () => import('@/components/load3d/Load3dViewerContent.vue')
+)
 import AssetsSidebarGridView from '@/components/sidebar/tabs/AssetsSidebarGridView.vue'
 import AssetsSidebarListView from '@/components/sidebar/tabs/AssetsSidebarListView.vue'
 import SidebarTabTemplate from '@/components/sidebar/tabs/SidebarTabTemplate.vue'