## 1. WeeklyReportPreview i18n
- [x] 1.1 Add translation keys for report labels and status names
- [x] 1.2 Add translation keys for error and loading messages
- [x] 1.3 Replace hardcoded strings with t() calls
- [x] 1.4 Use dynamic locale for date formatting

## 2. ReportHistory i18n
- [x] 2.1 Add translation keys for history labels
- [x] 2.2 Add translation keys for loading/empty states
- [x] 2.3 Replace hardcoded strings with t() calls

## 3. AuditPage Modal i18n
- [x] 3.1 Add translation keys for detail modal labels
- [x] 3.2 Add translation keys for verification modal
- [x] 3.3 Add translation keys for field names and status messages
- [x] 3.4 Replace hardcoded strings with t() calls

## 4. WorkloadPage i18n
- [x] 4.1 Replace hardcoded error message with t() call

## 5. Update Locale Files
- [x] 5.1 Add all new keys to en/common.json
- [x] 5.2 Add all new keys to zh-TW/common.json
- [x] 5.3 Verify key structure consistency

## 6. Verification
- [x] 6.1 Test English locale displays correctly
- [x] 6.2 Test Chinese locale displays correctly
- [x] 6.3 Verify no untranslated strings remain
- [x] 6.4 Frontend builds successfully