feat: status property — Notion-style dropdown with color chips (#97)

* fix: resolve search panel freeze by making search_vault async

The search_vault Tauri command was synchronous (fn, not async fn),
blocking the main thread for 30+ seconds during hybrid/semantic
search on large vaults (9200+ files). This caused the macOS beachball.

Changes:
- Make search_vault async with tokio::spawn_blocking (runs qmd off main thread)
- Cache collection name per vault path (avoid repeated qmd collection list calls)
- Cancel inflight searches and debounce timers when panel closes
- Add regression test for stale result cancellation on panel close

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

* design: add status property dropdown wireframes

Three frames: closed pill state, open dropdown with suggested/vault
statuses, and custom status creation flow.

Also bump flaky NoteList 9000-entry test timeout from 15s to 30s.

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

* feat: replace status text edit with Notion-style dropdown

- Extract STATUS_STYLES to shared statusStyles.ts utility
- New StatusDropdown component: filterable popover with colored pills
- StatusPill reusable component for consistent status chip rendering
- Vault-wide status aggregation from entries prop
- Dropdown shows "From vault" and "Suggested" sections
- Custom status creation via type-and-Enter
- Escape/backdrop click cancels without saving
- Keyboard navigation (ArrowUp/Down + Enter)
- 22 new tests covering dropdown behavior + integration

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

* fix: cargo fmt

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

src/utils/statusStyles.ts

@@ -0,0 +1,43 @@
+export interface StatusStyle {
+  bg: string
+  color: string
+}
+
+export const STATUS_STYLES: Record<string, StatusStyle> = {
+  Active: { bg: 'var(--accent-green-light)', color: 'var(--accent-green)' },
+  Done: { bg: 'var(--accent-blue-light)', color: 'var(--accent-blue)' },
+  Paused: { bg: 'var(--accent-yellow-light)', color: 'var(--accent-yellow)' },
+  Archived: { bg: 'var(--accent-blue-light)', color: 'var(--muted-foreground)' },
+  Dropped: { bg: 'var(--accent-red-light)', color: 'var(--accent-red)' },
+  Open: { bg: 'var(--accent-green-light)', color: 'var(--accent-green)' },
+  Closed: { bg: 'var(--accent-blue-light)', color: 'var(--muted-foreground)' },
+  'Not started': { bg: 'var(--accent-blue-light)', color: 'var(--muted-foreground)' },
+  Draft: { bg: 'var(--accent-yellow-light)', color: 'var(--accent-yellow)' },
+  Mixed: { bg: 'var(--accent-yellow-light)', color: 'var(--accent-yellow)' },
+  Published: { bg: 'var(--accent-green-light)', color: 'var(--accent-green)' },
+  'In progress': { bg: 'var(--accent-purple-light)', color: 'var(--accent-purple)' },
+  Blocked: { bg: 'var(--accent-red-light)', color: 'var(--accent-red)' },
+  Cancelled: { bg: 'var(--accent-red-light)', color: 'var(--accent-red)' },
+  Pending: { bg: 'var(--accent-yellow-light)', color: 'var(--accent-yellow)' },
+}
+
+export const DEFAULT_STATUS_STYLE: StatusStyle = {
+  bg: 'var(--accent-blue-light)',
+  color: 'var(--muted-foreground)',
+}
+
+/** Default suggested statuses shown in the dropdown */
+export const SUGGESTED_STATUSES = [
+  'Not started',
+  'In progress',
+  'Active',
+  'Done',
+  'Blocked',
+  'Paused',
+  'Draft',
+  'Archived',
+]
+
+export function getStatusStyle(status: string): StatusStyle {
+  return STATUS_STYLES[status] ?? DEFAULT_STATUS_STYLE
+}