test: add Playwright smoke test for exact-match search ranking

Verifies that searching "Writing" in Quick Open shows the exact title
match first, followed by prefix matches. Also adds Refactoring test
entries to mock data and demo vault.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/hooks/useKeyboardNavigation.ts

@@ -13,7 +13,6 @@ interface KeyboardNavigationOptions {
   activeTabPath: string | null
   entries: VaultEntry[]
   selection: SidebarSelection
-  allContent: Record<string, string>
   onSwitchTab: (path: string) => void
   onReplaceActiveTab: (entry: VaultEntry) => void
   onSelectNote: (entry: VaultEntry) => void
@@ -22,10 +21,9 @@ interface KeyboardNavigationOptions {
 function computeVisibleNotes(
   entries: VaultEntry[],
   selection: SidebarSelection,
-  allContent: Record<string, string>,
 ): VaultEntry[] {
   if (selection.kind === 'entity') {
-    return buildRelationshipGroups(selection.entry, entries, allContent)
+    return buildRelationshipGroups(selection.entry, entries)
       .flatMap((g) => g.entries)
   }
   return [...filterEntries(entries, selection)].sort(sortByModified)
@@ -93,12 +91,12 @@ function useLatestRef<T>(value: T): React.RefObject<T> {
 }
 
 export function useKeyboardNavigation({
-  tabs, activeTabPath, entries, selection, allContent,
+  tabs, activeTabPath, entries, selection,
   onSwitchTab, onReplaceActiveTab, onSelectNote,
 }: KeyboardNavigationOptions) {
   const visibleNotes = useMemo(
-    () => computeVisibleNotes(entries, selection, allContent),
-    [entries, selection, allContent],
+    () => computeVisibleNotes(entries, selection),
+    [entries, selection],
   )
 
   const tabsRef = useLatestRef(tabs)