refactor: tighten ownership filter typing

- Change FilterState.ownership to use OwnershipOption literal union type
- Use strict comparison (=== false/true) for is_immutable checks
- Move type definitions before interface to follow dependency order

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

Co-Authored-By: Claude <[email protected]>

Author: luke-mino-altherr

src/platform/assets/components/AssetFilterBar.vue

@@ -65,13 +65,6 @@ import { t } from '@/i18n'
 import { useAssetFilterOptions } from '@/platform/assets/composables/useAssetFilterOptions'
 import type { AssetItem } from '@/platform/assets/schemas/assetSchema'
 
-export interface FilterState {
-  fileFormats: string[]
-  baseModels: string[]
-  sortBy: string
-  ownership: string
-}
-
 const SORT_OPTIONS = [
   { name: t('assetBrowser.sortRecent'), value: 'recent' },
   { name: t('assetBrowser.sortAZ'), value: 'name-asc' },
@@ -92,6 +85,13 @@ type OwnershipOption = (typeof OWNERSHIP_OPTIONS)[number]['value']
 
 const ownershipOptions = [...OWNERSHIP_OPTIONS]
 
+export interface FilterState {
+  fileFormats: string[]
+  baseModels: string[]
+  sortBy: string
+  ownership: OwnershipOption
+}
+
 const { assets = [] } = defineProps<{
   assets?: AssetItem[]
 }>()
@@ -105,7 +105,7 @@ const { availableFileFormats, availableBaseModels } =
   useAssetFilterOptions(assets)
 
 const hasMutableAssets = computed(() =>
-  assets.some((asset) => !asset.is_immutable)
+  assets.some((asset) => asset.is_immutable === false)
 )
 
 const emit = defineEmits<{

src/platform/assets/composables/useAssetBrowser.ts

@@ -38,8 +38,8 @@ function filterByBaseModels(models: string[]) {
 function filterByOwnership(ownership: string) {
   return (asset: AssetItem) => {
     if (ownership === 'all') return true
-    if (ownership === 'my-models') return !asset.is_immutable
-    if (ownership === 'public-models') return asset.is_immutable
+    if (ownership === 'my-models') return asset.is_immutable === false
+    if (ownership === 'public-models') return asset.is_immutable === true
     return true
   }
 }