fix: resolve test failures related to v0.5.12 changes (#491)

* fix: update tests for new batch delete and update mechanism changes

**sessions-routes.test.ts:**
- Add missing batchRemove mock to controller mock
- Fix "No batchRemove export defined" error

**update-controller.test.ts:**
- Update test to expect direct npm/npm.cmd calls instead of dirname(process.execPath)
- Update timeout from 120000 to 10 * 60 * 1000 (10 minutes)
- Update spawn path check to use dynamic global prefix (expect.any)

Tests now match the refactored update mechanism that uses npm prefix -g
for reliable path resolution.

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

* test: add speechSynthesis mock to message-item-highlight tests

* test: fix all failing tests

- Add approvals mock to session-settings test
- Fix NSwitch stub to properly emit events
- Update usage stats test expectations for new field structure
- Mock getDb in model-context tests to avoid database lock errors
- Add speechSynthesis API mock to message-item-highlight tests

Related to v0.5.12 feature changes

---------

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

tests/server/usage-analytics-db.test.ts

@@ -204,8 +204,25 @@ describe('native-style Hermes usage analytics DB aggregation', () => {
       { model: 'tool-model', input_tokens: 30, output_tokens: 20, cache_read_tokens: 5, cache_write_tokens: 1, reasoning_tokens: 2, sessions: 1 },
     ])
     expect(result.by_day).toHaveLength(2)
-    expect(result.by_day[0]).toEqual({ date: day(now - 86400), tokens: 10, cache: 1, sessions: 1, cost: 0.005 })
-    expect(result.by_day[1]).toMatchObject({ date: day(now), tokens: 203, cache: 15, sessions: 3 })
+    expect(result.by_day[0]).toEqual({
+      date: day(now - 86400),
+      input_tokens: 7,
+      output_tokens: 3,
+      cache_read_tokens: 1,
+      cache_write_tokens: 0,
+      sessions: 1,
+      errors: 0,
+      cost: 0.005,
+    })
+    expect(result.by_day[1]).toMatchObject({
+      date: day(now),
+      input_tokens: 131,
+      output_tokens: 72,
+      cache_read_tokens: 15,
+      cache_write_tokens: 3,
+      sessions: 3,
+      errors: 0,
+    })
     expect(result.by_day[1].cost).toBeCloseTo(0.038)
   })