feat(km): add full corpus asset taxonomy readback

apps/web/messages/en.json

@@ -2187,7 +2187,7 @@
       "clear": "清除",
       "matrixTitle": "全域分類 / 資產矩陣",
       "matrixSubtitle": "用目前 KM readback 與 RAG stats，把專案、產品、網站、服務、套件、工具、Log、Alert、PlayBook、RAG、MCP 與排程分群顯示。",
-      "autoUpdated": "API 驅動",
+      "autoUpdated": "Full-corpus readback",
       "global": "全域",
       "project": "專案",
       "product": "產品",

apps/web/messages/zh-TW.json

@@ -2187,7 +2187,7 @@
       "clear": "清除",
       "matrixTitle": "全域分類 / 資產矩陣",
       "matrixSubtitle": "用目前 KM readback 與 RAG stats，把專案、產品、網站、服務、套件、工具、Log、Alert、PlayBook、RAG、MCP 與排程分群顯示。",
-      "autoUpdated": "API 驅動",
+      "autoUpdated": "全庫 readback",
       "global": "全域",
       "project": "專案",
       "product": "產品",

apps/web/src/app/[locale]/knowledge-base/page.tsx

@@ -53,10 +53,16 @@ interface CategoryCount {
   count: number
 }
 
+interface AssetTaxonomyCount {
+  key: AssetLensKey
+  count: number
+}
+
 interface ListResponse {
   items: KnowledgeEntry[]
   total: number
   categories: CategoryCount[]
+  asset_taxonomy?: AssetTaxonomyCount[]
   readback_status?: 'ready' | 'degraded' | string
   operator_stage?: string | null
   next_step?: string | null
@@ -264,6 +270,7 @@ const DEFAULT_CATEGORY_ORDER = [
 const KNOWN_CATEGORY_KEYS = new Set([
   'AI自動化/Ansible受控修復',
   'AI治理',
+  'alert',
   'alert_handling',
   'application',
   'ai_system',
@@ -388,6 +395,7 @@ const CATEGORY_BAR_COLORS: Record<string, string> = {
 }
 
 const CATEGORY_ORDER_RANK = new Map(DEFAULT_CATEGORY_ORDER.map((category, index) => [category, index]))
+const ASSET_TAXONOMY_FALLBACK_COUNTS: AssetTaxonomyCount[] = ASSET_LENS_KEYS.map(key => ({ key, count: 0 }))
 
 const TAG_TONES: Record<string, string> = {
   critical: 'border-status-critical/20 bg-status-critical/10 text-status-critical',
@@ -485,6 +493,7 @@ export default function KnowledgeBasePage({
   const [entries, setEntries] = useState<KnowledgeEntry[]>([])
   const [total, setTotal] = useState(0)
   const [categories, setCategories] = useState<CategoryCount[]>([])
+  const [assetTaxonomy, setAssetTaxonomy] = useState<AssetTaxonomyCount[]>(ASSET_TAXONOMY_FALLBACK_COUNTS)
   const [loading, setLoading] = useState(true)
   const [entryFetchError, setEntryFetchError] = useState<string | null>(null)
   const [entryReadback, setEntryReadback] = useState<Pick<ListResponse, 'readback_status' | 'operator_stage' | 'next_step'> | null>(null)
@@ -529,6 +538,7 @@ export default function KnowledgeBasePage({
         setEntries(data.items)
         setTotal(data.total)
         setCategories(data.categories)
+        setAssetTaxonomy(data.asset_taxonomy?.length ? data.asset_taxonomy : ASSET_TAXONOMY_FALLBACK_COUNTS)
         setEntryReadback({
           readback_status: data.readback_status ?? 'ready',
           operator_stage: data.operator_stage ?? null,
@@ -539,14 +549,16 @@ export default function KnowledgeBasePage({
       const errorBody = await res.json().catch(() => null) as { detail?: string; message?: string } | null
       setEntries([])
       setTotal(0)
-      setCategories([])
+      setCategories(ASSET_TAXONOMY_FALLBACK_COUNTS.map(row => ({ category: row.key, count: 0 })))
+      setAssetTaxonomy(ASSET_TAXONOMY_FALLBACK_COUNTS)
       setEntryReadback(null)
       setEntryFetchError(errorBody?.detail ?? errorBody?.message ?? `${res.status} ${res.statusText}`)
     } catch (err) {
       console.error('Failed to fetch knowledge entries', err)
       setEntries([])
       setTotal(0)
-      setCategories([])
+      setCategories(ASSET_TAXONOMY_FALLBACK_COUNTS.map(row => ({ category: row.key, count: 0 })))
+      setAssetTaxonomy(ASSET_TAXONOMY_FALLBACK_COUNTS)
       setEntryReadback(null)
       setEntryFetchError(err instanceof Error ? err.message : String(err))
     } finally {
@@ -746,22 +758,27 @@ export default function KnowledgeBasePage({
   }, [categories, totalCount])
 
   const categoryNavigationRows = useMemo(() => {
-    if (categories.length === 0) return []
+    const sourceRows = mergeCategoryCounts(categories)
+    const positiveRows = sourceRows.filter(row => row.count > 0)
+    const fallbackRows = ASSET_TAXONOMY_FALLBACK_COUNTS.map(row => ({
+      category: row.key,
+      count: assetTaxonomy.find(item => item.key === row.key)?.count ?? row.count,
+    }))
+    const rows = positiveRows.length > 0 ? positiveRows : fallbackRows
 
-    const sourceRows = mergeCategoryCounts(categories).filter(row => row.count > 0)
-
-    return [...sourceRows].sort((a, b) => {
+    return [...rows].sort((a, b) => {
       const aRank = CATEGORY_ORDER_RANK.get(a.category) ?? Number.MAX_SAFE_INTEGER
       const bRank = CATEGORY_ORDER_RANK.get(b.category) ?? Number.MAX_SAFE_INTEGER
       if (aRank !== bRank) return aRank - bRank
       return b.count - a.count
     })
-  }, [categories])
+  }, [assetTaxonomy, categories])
 
   const assetLensRows = useMemo(() => {
     const ragChunks = governanceTelemetry.ragStats?.total_chunks ?? 0
+    const taxonomyByKey = new Map(assetTaxonomy.map(row => [row.key, row.count]))
     const countWhere = (lens: AssetLensKey) =>
-      baseDisplayedEntries.filter(entry => entryMatchesAssetLens(entry, lens)).length
+      taxonomyByKey.get(lens) ?? baseDisplayedEntries.filter(entry => entryMatchesAssetLens(entry, lens)).length
     const rows: Array<{
       key: AssetLensKey
       icon: LucideIcon
@@ -828,7 +845,7 @@ export default function KnowledgeBasePage({
         icon: FileSearch,
         count: ragChunks || countWhere('rag'),
         tone: ragChunks > 0 ? 'text-status-healthy' : 'text-status-critical',
-        global: ragChunks > 0,
+        global: ragChunks > 0 || taxonomyByKey.has('rag'),
       },
       {
         key: 'mcp',
@@ -844,7 +861,7 @@ export default function KnowledgeBasePage({
       },
     ]
     return ASSET_LENS_KEYS.map(key => rows.find(row => row.key === key)).filter((row): row is NonNullable<typeof row> => Boolean(row))
-  }, [baseDisplayedEntries, governanceTelemetry.ragStats])
+  }, [assetTaxonomy, baseDisplayedEntries, governanceTelemetry.ragStats])
 
   const qualityRows = useMemo(() => {
     const loaded = displayedEntries.length
@@ -1254,7 +1271,7 @@ export default function KnowledgeBasePage({
                       <Icon className={cn('h-3 w-3 shrink-0', row.tone)} aria-hidden={true} />
                     </div>
                     <p className={cn('mt-1 text-sm font-heading font-semibold tabular-nums', row.tone)}>
-                      {(row.key === 'rag' ? governanceLoading : !knowledgeReadbackReady) ? '--' : formatCount(row.count)}
+                      {(row.key === 'rag' ? governanceLoading && row.count === 0 : loading) ? '--' : formatCount(row.count)}
                     </p>
                   </button>
                 )
@@ -1265,7 +1282,7 @@ export default function KnowledgeBasePage({
           <div className="mt-3 flex items-center justify-between px-2">
             <span className="text-[10px] font-label uppercase tracking-wider text-muted">{t('rail.categoryTitle')}</span>
             <span className="text-[10px] font-body tabular-nums text-muted">
-              {knowledgeReadbackReady ? categoryNavigationRows.length : '--'}
+              {loading ? '--' : categoryNavigationRows.length}
             </span>
           </div>
 
@@ -1578,7 +1595,7 @@ export default function KnowledgeBasePage({
               <div className="grid grid-cols-2 gap-2 md:grid-cols-3 xl:grid-cols-6">
                 {assetLensRows.map(row => {
                   const Icon = row.icon
-                  const value = (row.key === 'rag' ? governanceLoading : !knowledgeReadbackReady)
+                  const value = (row.key === 'rag' ? governanceLoading && row.count === 0 : loading)
                     ? '--'
                     : formatCount(row.count)
                   return (