fix: exclude trashed notes from search results and autocomplete

Trashed notes were appearing in search (Cmd+F), Quick Open (Ctrl+P),
wikilink autocomplete ([[), and person mention autocomplete (@).

Rust: add is_file_trashed() to check frontmatter, filter search_vault results.
Frontend: filter trashed entries from useNoteSearch, baseItems in both
editor views, and mock search_vault handler.

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

src/components/RawEditorView.tsx

@@ -52,7 +52,7 @@ export function RawEditorView({ content, path, entries, onContentChange, onSave,
   const typeEntryMap = useMemo(() => buildTypeEntryMap(entries), [entries])
 
   const baseItems = useMemo(
-    () => deduplicateByPath(entries.map(entry => ({
+    () => deduplicateByPath(entries.filter(e => !e.trashed).map(entry => ({
       title: entry.title,
       aliases: [...new Set([entry.filename.replace(/\.md$/, ''), ...entry.aliases])],
       group: entry.isA || 'Note',

src/components/SingleEditorView.tsx

@@ -62,7 +62,7 @@ export function SingleEditorView({ editor, entries, onNavigateWikilink, onChange
   const typeEntryMap = useMemo(() => buildTypeEntryMap(entries), [entries])
 
   const baseItems = useMemo(
-    () => deduplicateByPath(entries.map(entry => ({
+    () => deduplicateByPath(entries.filter(e => !e.trashed).map(entry => ({
       title: entry.title,
       aliases: [...new Set([entry.filename.replace(/\.md$/, ''), ...entry.aliases])],
       group: entry.isA || 'Note',