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/RecipeSearch.vue

@@ -131,7 +131,7 @@ const catTrack = ref(null)
 
 onMounted(async () => {
   try {
-    const res = await api('/api/category-modules')
+    const res = await api('/api/categories')
     if (res.ok) {
       categories.value = await res.json()
     }