test: add command palette and fuzzy match tests

Tests for CommandPalette component (rendering, filtering, keyboard
navigation, grouped results, shortcuts display), useCommandRegistry
hook (contextual actions, archive toggle, git availability), fuzzyMatch
utility, and Cmd+K shortcut.

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

src/utils/fuzzyMatch.test.ts

@@ -0,0 +1,46 @@
+import { describe, it, expect } from 'vitest'
+import { fuzzyMatch } from './fuzzyMatch'
+
+describe('fuzzyMatch', () => {
+  it('matches exact string', () => {
+    const result = fuzzyMatch('hello', 'hello')
+    expect(result.match).toBe(true)
+    expect(result.score).toBeGreaterThan(0)
+  })
+
+  it('matches case-insensitively', () => {
+    expect(fuzzyMatch('hello', 'Hello World').match).toBe(true)
+  })
+
+  it('matches subsequence chars in order', () => {
+    expect(fuzzyMatch('cnt', 'Create New Type').match).toBe(true)
+  })
+
+  it('rejects when chars are not all present', () => {
+    expect(fuzzyMatch('xyz', 'hello').match).toBe(false)
+  })
+
+  it('rejects when chars are out of order', () => {
+    expect(fuzzyMatch('ba', 'abc').match).toBe(false)
+  })
+
+  it('returns higher score for consecutive matches', () => {
+    const consecutive = fuzzyMatch('com', 'Commit & Push')
+    const scattered = fuzzyMatch('cmt', 'Commit & Push')
+    expect(consecutive.score).toBeGreaterThan(scattered.score)
+  })
+
+  it('gives bonus for word-start matches', () => {
+    const wordStart = fuzzyMatch('cp', 'Commit Push')
+    const midWord = fuzzyMatch('om', 'Commit Push')
+    expect(wordStart.score).toBeGreaterThan(midWord.score)
+  })
+
+  it('matches empty query against any string', () => {
+    expect(fuzzyMatch('', 'anything').match).toBe(true)
+  })
+
+  it('handles empty target', () => {
+    expect(fuzzyMatch('a', '').match).toBe(false)
+  })
+})