Fix/qa defects df002 df011 (#9)

## Summary

What changed and why?

## Change Type

- [ ] Cowork feature
- [ ] Bug fix
- [ ] Core AI contribution
- [ ] Test / hardening
- [ ] Performance
- [ ] Documentation

## Related Work

Cowork Task:

Core Repo: http://34.143.229.138/gitea-admin/fsg-ai-core-assets

Core AI Issue:

Core Task:

Related PR:

## Scope

What is intentionally included?

What is intentionally NOT included?

## Validation

- [ ] Unit tests
- [ ] Integration tests
- [ ] Manual verification
- [ ] Regression check

Commands / evidence:

## Security Impact

Permission / credential / network / customer data impact:

## Compatibility

- [ ] No breaking change
- [ ] Breaking change documented

## Reviewer Notes

Anything Cowork reviewers should pay attention to.

---------

Co-authored-by: thanhnv <thanhnv.ip@gmail.com>
Co-authored-by: Vu Dam Tuan <vudt15@fpt.com>
Reviewed-on: #9

i18n/agents_admin_tab.py

@@ -232,6 +232,8 @@ STRINGS: Dict[str, Dict[str, str]] = {
         "ja": "行をフィルター（質問を入力しても可）…",
         "vi": "Lọc dòng (hoặc gõ câu hỏi rồi bấm )…"},
     "monitoring.ai_filter_btn": {"en": "AI", "ja": "AI", "vi": "AI"},
+    "monitoring.page_size_label": {
+        "en": "Rows/page:", "ja": "1ページの行数:", "vi": "Số dòng/trang:"},
     "monitoring.pricing_title": {
         "en": "Model pricing (USD / 1M tokens)", "ja": "モデル価格表 (USD / 100万トークン)",
         "vi": "Bảng giá model (USD / 1 triệu token)"},