feat: fix category counts and add matchContext for search highlights

- Category tab counts now reflect query-filtered results, not total data
- Added matchContext field to SearchResult for server-side match snippets
- Renders <em>-tagged highlight text below meta in muted style

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/design-system/composites/CommandPalette/CommandPalette.module.css

@@ -277,6 +277,23 @@
   overflow-y: auto;
 }
 
+/* Match context snippet */
+.matchContext {
+  font-size: 11px;
+  color: var(--text-faint);
+  font-family: var(--font-mono);
+  margin-top: 3px;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.matchContext em {
+  font-style: normal;
+  color: var(--amber);
+  font-weight: 600;
+}
+
 /* Match highlight */
 .mark {
   background: none;

src/design-system/composites/CommandPalette/CommandPalette.tsx

@@ -92,14 +92,10 @@ export function CommandPalette({ open, onClose, onSelect, data, onOpen, onQueryC
     }
   }, [open])
 
-  // Filter results
-  const filtered = useMemo(() => {
+  // Stage 1: apply text query + scope filters (used for counts)
+  const queryFiltered = useMemo(() => {
     let results = data
 
-    if (activeCategory !== 'all') {
-      results = results.filter((r) => r.category === activeCategory)
-    }
-
     if (query.trim()) {
       const q = query.toLowerCase()
       results = results.filter(
@@ -107,7 +103,6 @@ export function CommandPalette({ open, onClose, onSelect, data, onOpen, onQueryC
       )
     }
 
-    // Apply scope filters
     for (const sf of scopeFilters) {
       results = results.filter((r) =>
         r.category === sf.field || r.title.toLowerCase().includes(sf.value.toLowerCase()),
@@ -115,7 +110,13 @@ export function CommandPalette({ open, onClose, onSelect, data, onOpen, onQueryC
     }
 
     return results
-  }, [data, query, activeCategory, scopeFilters])
+  }, [data, query, scopeFilters])
+
+  // Stage 2: apply category filter (used for display)
+  const filtered = useMemo(() => {
+    if (activeCategory === 'all') return queryFiltered
+    return queryFiltered.filter((r) => r.category === activeCategory)
+  }, [queryFiltered, activeCategory])
 
   // Group results by category
   const grouped = useMemo(() => {
@@ -130,14 +131,14 @@ export function CommandPalette({ open, onClose, onSelect, data, onOpen, onQueryC
   // Flatten for keyboard nav
   const flatResults = useMemo(() => filtered, [filtered])
 
-  // Counts per category
+  // Counts per category (from query-filtered, before category filter)
   const categoryCounts = useMemo(() => {
-    const counts: Record<string, number> = { all: data.length }
-    for (const r of data) {
+    const counts: Record<string, number> = { all: queryFiltered.length }
+    for (const r of queryFiltered) {
       counts[r.category] = (counts[r.category] ?? 0) + 1
     }
     return counts
-  }, [data])
+  }, [queryFiltered])
 
   function handleKeyDown(e: React.KeyboardEvent) {
     switch (e.key) {
@@ -303,6 +304,12 @@ export function CommandPalette({ open, onClose, onSelect, data, onOpen, onQueryC
                           <div className={styles.itemMeta}>
                             {highlightText(result.meta, query)}
                           </div>
+                          {result.matchContext && (
+                            <div
+                              className={styles.matchContext}
+                              dangerouslySetInnerHTML={{ __html: result.matchContext }}
+                            />
+                          )}
                         </div>
                         {result.expandedContent && (
                           <button

src/design-system/composites/CommandPalette/types.ts

@@ -15,6 +15,8 @@ export interface SearchResult {
   matchRanges?: [number, number][]
   /** Skip client-side query filtering (result already matched server-side) */
   serverFiltered?: boolean
+  /** Server-side match snippet with <em> tags around matched text */
+  matchContext?: string
 }
 
 export interface ScopeFilter {