One-Click Timezone Update Tests
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Test 1: updateTimezone method exists and handles valid timezone
  ✓ IdentityController has updateTimezone method

Test 2: Route configuration exists
  ✓ Route /user/update-timezone exists in routes.json
  ✓ Route points to IdentityController
  ✓ Route method is updateTimezone

Test 3: Template has Update Timezone button
  ✓ Template has updateTimezoneBtn element
  ✓ Template has Update Timezone button text
  ✓ Template has fetch() JavaScript call
  ✓ Template calls /api/user/update-timezone endpoint

Test 4: Test timezone normalization in updateTimezone method
  ✓ Eastern Time (ET) normalizes to America/New_York
  ✓ America/New_York stays as America/New_York
  ✓ Invalid timezone normalizes to null

Test 5: CSRF protection integration
  ✓ CsrfProtection class exists for CSRF token validation

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Summary: 12 passed, 0 failed
🎉 One-click timezone update feature implemented successfully!