Feature/fsg gamma team ui fix (#3)

## Summary

What changed and why?

## Change Type

- [ ] Cowork feature
- [ ] Bug fix
- [x] 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: Hiep Ha Van <hiephv3@fpt.com>
Co-authored-by: Nam Pham Dinh Thanh <nampdt@fpt.com>
Co-authored-by: Lam Hoang Van <lamhv7@fpt.com>
Co-authored-by: NamPDT <minhanhpkpro@gmail.com>
Reviewed-on: #3

ui/accounts_tab.py

@@ -28,7 +28,7 @@ from ..core import usage_tracker as ut
 from ..core.worker import AgentWorker
 from ..i18n import on_language_changed, tr
 from ..state import AppContext
-from .icons import icon
+from .icons import DOT_AMBER, icon
 from .widgets import fmt_tokens
 
 _PERIODS = ("day", "week", "month", "year")
@@ -367,7 +367,7 @@ class AccountsTab(QWidget):
         label = f"{acc.display_name or acc.username} ({acc.username}) — {tr(f'accounts.role.{acc.role}')}"
         item = QTreeWidgetItem([label])
         if is_subadmin:   # subadmin badge → star icon instead of a ★ glyph
-            item.setIcon(0, icon("star", color="#f59e0b"))
+            item.setIcon(0, icon("star", color=DOT_AMBER))
         item.setData(0, Qt.UserRole, ("account", acc.username))
         if acc.email:
             item.setToolTip(0, acc.email)