feat(skills): 技能库 - 内置技能目录迁移为 Markdown 包

backend/internal/database/migrations.go

@@ -11,7 +11,7 @@ import (
 	"gorm.io/gorm"
 )
 
-const CurrentSchemaVersion int64 = 38
+const CurrentSchemaVersion int64 = 40
 
 const baselineSchemaChecksum = "sha256:open-ai-canvas-schema-v1-20260830"
 const schemaMigrationAppliedAtIndexChecksum = "sha256:schema-migrations-applied-at-index-v2-20260830"
@@ -26,6 +26,8 @@ const authNotificationsChecksum = "sha256:auth-notifications-v35-20260924"
 const cloudAgentGeminiCacheChecksum = "sha256:cloud-agent-gemini-cache-v36-20260924"
 const cloudAgentGeminiCacheIdentityChecksum = "sha256:cloud-agent-gemini-cache-identity-v37-20260925"
 const prefixedIDSequenceReconcileChecksum = "sha256:prefixed-id-sequence-reconcile-v38-20260926"
+const skillLibraryCategoriesChecksum = "sha256:skill-library-categories-v39-20260926"
+const builtinSkillTombstonesChecksum = "sha256:builtin-skill-tombstones-v40-20260926"
 
 const postgresSchemaMigrationLockID int64 = 73123910420260830
 
@@ -127,6 +129,12 @@ var schemaMigrations = []migration{
 	}},
 	{version: 37, name: "cloud_agent_gemini_cache_identity", checksum: cloudAgentGeminiCacheIdentityChecksum, apply: migrateCloudAgentGeminiCacheIdentity},
 	{version: 38, name: "prefixed_id_sequence_reconcile", checksum: prefixedIDSequenceReconcileChecksum, apply: migratePrefixedIDSequenceReconcile},
+	{version: 39, name: "skill_library_categories", checksum: skillLibraryCategoriesChecksum, apply: func(tx *gorm.DB) error {
+		return tx.AutoMigrate(&model.SkillLibraryCategory{}, &model.UserSkillState{})
+	}},
+	{version: 40, name: "builtin_skill_tombstones", checksum: builtinSkillTombstonesChecksum, apply: func(tx *gorm.DB) error {
+		return tx.AutoMigrate(&model.BuiltinSkillTombstone{})
+	}},
 }
 
 func migratePrefixedIDSequenceReconcile(tx *gorm.DB) error {

backend/internal/database/schema.go

@@ -65,9 +65,11 @@ func Models() []any {
 		&model.StorageLocation{},
 		&model.UserDailyUploadUsage{},
 		&model.Skill{},
+		&model.SkillLibraryCategory{},
 		&model.SkillVersion{},
 		&model.SkillFile{},
 		&model.UserSkillState{},
+		&model.BuiltinSkillTombstone{},
 		&model.Tool{},
 		&model.ToolFavorite{},
 		&model.Resource{},