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/cypress/e2e/endpoint-parity.cy.js

@@ -0,0 +1,74 @@
+// Verify that Vue frontend pages call the correct backend API endpoints.
+// This test catches mismatched endpoint names (e.g. /api/bugs vs /api/bug-reports).
+
+const ADMIN_TOKEN = 'c86ae7afbe10fabe3c1d5e1a7fee74feaadfd5dc7be2ab62'
+
+describe('API Endpoint Parity', () => {
+  function visitAsAdmin(path) {
+    cy.visit(path, {
+      onBeforeLoad(win) {
+        win.localStorage.setItem('oil_auth_token', ADMIN_TOKEN)
+      }
+    })
+  }
+
+  it('search page loads recipes from /api/recipes', () => {
+    cy.intercept('GET', '/api/recipes').as('recipes')
+    visitAsAdmin('/')
+    cy.wait('@recipes').its('response.statusCode').should('eq', 200)
+  })
+
+  it('search page loads oils from /api/oils', () => {
+    cy.intercept('GET', '/api/oils').as('oils')
+    visitAsAdmin('/')
+    cy.wait('@oils').its('response.statusCode').should('eq', 200)
+  })
+
+  it('oil reference page loads oils', () => {
+    cy.intercept('GET', '/api/oils').as('oils')
+    visitAsAdmin('/oils')
+    cy.wait('@oils').its('response.statusCode').should('eq', 200)
+  })
+
+  it('audit log page loads from /api/audit-log', () => {
+    cy.intercept('GET', '/api/audit-log*').as('audit')
+    visitAsAdmin('/audit')
+    cy.wait('@audit').its('response.statusCode').should('eq', 200)
+  })
+
+  it('audit log page does NOT call /api/audit-logs (wrong endpoint)', () => {
+    cy.intercept('GET', '/api/audit-logs*').as('wrongAudit')
+    visitAsAdmin('/audit')
+    cy.wait(2000)
+    cy.get('@wrongAudit.all').should('have.length', 0)
+  })
+
+  it('bug tracker page loads from /api/bug-reports', () => {
+    cy.intercept('GET', '/api/bug-reports').as('bugs')
+    visitAsAdmin('/bugs')
+    cy.wait('@bugs').its('response.statusCode').should('eq', 200)
+  })
+
+  it('bug tracker page does NOT call /api/bugs (wrong endpoint)', () => {
+    cy.intercept('GET', '/api/bugs').as('wrongBugs')
+    visitAsAdmin('/bugs')
+    cy.wait(2000)
+    cy.get('@wrongBugs.all').should('have.length', 0)
+  })
+
+  it('user management page loads from /api/users', () => {
+    cy.intercept('GET', '/api/users').as('users')
+    visitAsAdmin('/users')
+    cy.wait('@users').its('response.statusCode').should('eq', 200)
+  })
+
+  it('categories load from /api/categories', () => {
+    cy.intercept('GET', '/api/categories').as('cats')
+    visitAsAdmin('/')
+    cy.wait(3000)
+    // Categories may or may not be fetched depending on page logic
+    // Just verify no /api/category-modules calls
+    cy.intercept('GET', '/api/category-modules').as('wrongCats')
+    cy.get('@wrongCats.all').should('have.length', 0)
+  })
+})

frontend/cypress/support/e2e.js

@@ -1,5 +1,11 @@
-// Ignore uncaught exceptions from the app (API errors during loading, etc.)
-Cypress.on('uncaught:exception', () => false)
+// Log uncaught exceptions but don't swallow them blindly.
+// Only ignore known non-critical errors (e.g. ResizeObserver).
+Cypress.on('uncaught:exception', (err) => {
+  // ResizeObserver loop errors are harmless
+  if (err.message.includes('ResizeObserver')) return false
+  // Let all other errors fail the test
+  return true
+})
 
 // Custom commands for the oil calculator app