✨ feat: Add prefill group management system for models

- Add new PrefillGroup model with CRUD operations
  * Support for model, tag, and endpoint group types
  * JSON storage for group items with GORM datatypes
  * Automatic database migration support

- Implement backend API endpoints
  * GET /api/prefill_group - List groups by type with admin auth
  * POST /api/prefill_group - Create new groups
  * PUT /api/prefill_group - Update existing groups
  * DELETE /api/prefill_group/:id - Delete groups

- Add comprehensive frontend management interface
  * PrefillGroupManagement component for group listing
  * EditPrefillGroupModal for group creation/editing
  * Integration with EditModelModal for auto-filling
  * Responsive design with CardTable and SideSheet

- Enhance model editing workflow
  * Tag group selection with auto-fill functionality
  * Endpoint group selection with auto-fill functionality
  * Seamless integration with existing model forms

- Create reusable UI components
  * Extract common rendering utilities to models/ui/
  * Shared renderLimitedItems and renderDescription functions
  * Consistent styling across all model-related components

- Improve user experience
  * Empty state illustrations matching existing patterns
  * Fixed column positioning for operation buttons
  * Item content display with +x indicators for overflow
  * Tooltip support for long descriptions

model/main.go

@@ -252,6 +252,7 @@ func migrateDB() error {
 		&Task{},
 		&Model{},
 		&Vendor{},
+		&PrefillGroup{},
 		&Setup{},
 	)
 	if err != nil {
@@ -280,6 +281,7 @@ func migrateDBFast() error {
 		{&Task{}, "Task"},
 		{&Model{}, "Model"},
         {&Vendor{}, "Vendor"},
+		{&PrefillGroup{}, "PrefillGroup"},
 		{&Setup{}, "Setup"},
 	}
 	// 动态计算migration数量，确保errChan缓冲区足够大