feat: add shared utilities and table macros

- Add shared table macros for consistent table styling
- Add shared JavaScript utilities (date formatting, etc.)
- Add admin settings API enhancements
- Add admin schema updates

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/api/v1/admin/settings.py

@@ -24,6 +24,9 @@ from models.schema.admin import (
     AdminSettingListResponse,
     AdminSettingResponse,
     AdminSettingUpdate,
+    PublicDisplaySettingsResponse,
+    RowsPerPageResponse,
+    RowsPerPageUpdateResponse,
 )
 
 router = APIRouter(prefix="/settings")
@@ -173,6 +176,81 @@ def upsert_setting(
     return result
 
 
+# ============================================================================
+# CONVENIENCE ENDPOINTS FOR COMMON SETTINGS
+# ============================================================================
+
+
+@router.get("/display/rows-per-page", response_model=RowsPerPageResponse)
+def get_rows_per_page(
+    db: Session = Depends(get_db),
+    current_admin: User = Depends(get_current_admin_api),
+) -> RowsPerPageResponse:
+    """Get the platform-wide rows per page setting."""
+    value = admin_settings_service.get_setting_value(db, "rows_per_page", default="20")
+    return RowsPerPageResponse(rows_per_page=int(value))
+
+
+@router.put("/display/rows-per-page", response_model=RowsPerPageUpdateResponse)
+def set_rows_per_page(
+    rows: int = Query(..., ge=10, le=100, description="Rows per page (10-100)"),
+    db: Session = Depends(get_db),
+    current_admin: User = Depends(get_current_admin_api),
+) -> RowsPerPageUpdateResponse:
+    """
+    Set the platform-wide rows per page setting.
+
+    Valid values: 10, 20, 50, 100
+    """
+    valid_values = [10, 20, 50, 100]
+    if rows not in valid_values:
+        # Round to nearest valid value
+        rows = min(valid_values, key=lambda x: abs(x - rows))
+
+    setting_data = AdminSettingCreate(
+        key="rows_per_page",
+        value=str(rows),
+        value_type="integer",
+        category="display",
+        description="Default number of rows per page in admin tables",
+        is_public=True,
+    )
+
+    admin_settings_service.upsert_setting(
+        db=db, setting_data=setting_data, admin_user_id=current_admin.id
+    )
+
+    admin_audit_service.log_action(
+        db=db,
+        admin_user_id=current_admin.id,
+        action="update_setting",
+        target_type="setting",
+        target_id="rows_per_page",
+        details={"value": rows},
+    )
+    db.commit()
+
+    return RowsPerPageUpdateResponse(
+        rows_per_page=rows, message="Rows per page setting updated"
+    )
+
+
+@router.get("/display/public", response_model=PublicDisplaySettingsResponse)
+def get_public_display_settings(
+    db: Session = Depends(get_db),
+) -> PublicDisplaySettingsResponse:
+    """
+    Get public display settings (no auth required).
+
+    Returns settings that can be used by frontend without admin auth.
+    """
+    rows_per_page = admin_settings_service.get_setting_value(
+        db, "rows_per_page", default="20"
+    )
+
+    return PublicDisplaySettingsResponse(rows_per_page=int(rows_per_page))
+
+
 @router.delete("/{key}")
 def delete_setting(
     key: str,