Fix 5 wrong API endpoints + stop swallowing JS errors in E2E

Endpoint fixes:
- AuditLog: /api/audit-logs → /api/audit-log
- BugTracker: /api/bugs → /api/bug-reports, create → /api/bug-report
- BugTracker: fix create body (content+priority, not title/description)
- MyDiary: /api/brand-settings → /api/brand
- MyDiary: /api/me/display-name → PUT /api/me
- RecipeSearch: /api/category-modules → /api/categories

Test improvements:
- Remove blanket uncaught:exception swallow (only ignore ResizeObserver)
- Add endpoint-parity.cy.js: intercept-based test that verifies correct
  API endpoints are called and wrong ones are NOT called

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/src/views/AuditLog.vue

@@ -154,7 +154,7 @@ function formatDetail(log) {
 async function fetchLogs() {
   loading.value = true
   try {
-    const res = await api(`/api/audit-logs?offset=${page.value * pageSize}&limit=${pageSize}`)
+    const res = await api(`/api/audit-log?offset=${page.value * pageSize}&limit=${pageSize}`)
     if (res.ok) {
       const data = await res.json()
       const items = Array.isArray(data) ? data : data.logs || data.items || []
@@ -179,7 +179,7 @@ async function undoLog(log) {
   if (!ok) return
   try {
     const id = log._id || log.id
-    const res = await api(`/api/audit-logs/${id}/undo`, { method: 'POST' })
+    const res = await api(`/api/audit-log/${id}/undo`, { method: 'POST' })
     if (res.ok) {
       ui.showToast('已撤销')
       // Refresh