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>

models/schema/admin.py

@@ -187,6 +187,30 @@ class AdminSettingListResponse(BaseModel):
     category: str | None = None
 
 
+# ============================================================================
+# DISPLAY SETTINGS SCHEMAS
+# ============================================================================
+
+
+class RowsPerPageResponse(BaseModel):
+    """Response for rows per page setting."""
+
+    rows_per_page: int
+
+
+class RowsPerPageUpdateResponse(BaseModel):
+    """Response after updating rows per page."""
+
+    rows_per_page: int
+    message: str
+
+
+class PublicDisplaySettingsResponse(BaseModel):
+    """Public display settings (no auth required)."""
+
+    rows_per_page: int
+
+
 # ============================================================================
 # PLATFORM ALERT SCHEMAS
 # ============================================================================