✨ 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

go.mod

@@ -34,12 +34,13 @@ require (
 	golang.org/x/image v0.23.0
 	golang.org/x/net v0.35.0
 	golang.org/x/sync v0.11.0
-	gorm.io/driver/mysql v1.4.3
+	gorm.io/driver/mysql v1.5.6
 	gorm.io/driver/postgres v1.5.2
-	gorm.io/gorm v1.25.2
+	gorm.io/gorm v1.30.0
 )
 
 require (
+	filippo.io/edwards25519 v1.1.0 // indirect
 	github.com/anknown/darts v0.0.0-20151216065714-83ff685239e6 // indirect
 	github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream v1.6.2 // indirect
 	github.com/aws/aws-sdk-go-v2/internal/configsources v1.3.5 // indirect
@@ -59,7 +60,7 @@ require (
 	github.com/go-ole/go-ole v1.2.6 // indirect
 	github.com/go-playground/locales v0.14.1 // indirect
 	github.com/go-playground/universal-translator v0.18.1 // indirect
-	github.com/go-sql-driver/mysql v1.7.0 // indirect
+	github.com/go-sql-driver/mysql v1.8.1 // indirect
 	github.com/goccy/go-json v0.10.2 // indirect
 	github.com/google/go-cmp v0.6.0 // indirect
 	github.com/gorilla/context v1.1.1 // indirect
@@ -91,6 +92,7 @@ require (
 	golang.org/x/text v0.22.0 // indirect
 	google.golang.org/protobuf v1.34.2 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
+	gorm.io/datatypes v1.2.6 // indirect
 	modernc.org/libc v1.22.5 // indirect
 	modernc.org/mathutil v1.5.0 // indirect
 	modernc.org/memory v1.5.0 // indirect