feat(canvas): 创作助手 - 合并创作对话、能力发现与画布接续

backend/internal/database/migrations.go

@@ -10,7 +10,7 @@ import (
 	"gorm.io/gorm"
 )
 
-const CurrentSchemaVersion int64 = 9
+const CurrentSchemaVersion int64 = 10
 
 const baselineSchemaChecksum = "sha256:open-ai-canvas-schema-v1-20260830"
 const schemaMigrationAppliedAtIndexChecksum = "sha256:schema-migrations-applied-at-index-v2-20260830"
@@ -20,6 +20,7 @@ const paymentTopupChecksum = "sha256:payment-topup-v5-20260902"
 const resourcePlaybackChecksum = "sha256:resource-playback-v6-20260902"
 const assetLibraryFoldersChecksum = "sha256:asset-library-folders-v6-20260902"
 const logicalModelActiveCodeChecksum = "sha256:logical-model-active-code-v8-20260905"
+const creationRuntimeChecksum = "sha256:creation-runtime-v10-20260909"
 
 const postgresSchemaMigrationLockID int64 = 73123910420260830
 
@@ -55,6 +56,7 @@ var schemaMigrations = []migration{
 	{version: 7, name: "asset_library_folders", checksum: assetLibraryFoldersChecksum, apply: migrateSchemaV7},
 	{version: 8, name: "logical_model_active_code", checksum: logicalModelActiveCodeChecksum, apply: migrateSchemaV8},
 	{version: 9, name: "channel_presentation", checksum: "sha256:channel-presentation-v9-20260908", apply: migrateChannelPresentation},
+	{version: 10, name: "creation_runtime", checksum: creationRuntimeChecksum, apply: migrateSchemaV10},
 }
 
 func migrateChannelPresentation(tx *gorm.DB) error {
@@ -213,6 +215,14 @@ func migrateSchemaV8(tx *gorm.DB) error {
 	return nil
 }
 
+// migrateSchemaV10 只增加创作运行时表和任务幂等关联；旧任务的空 submission ID 必须继续合法。
+func migrateSchemaV10(tx *gorm.DB) error {
+	if err := tx.AutoMigrate(&model.CreationRun{}, &model.CreationSubmission{}, &model.Task{}); err != nil {
+		return fmt.Errorf("创建创作运行时结构：%w", err)
+	}
+	return nil
+}
+
 func MigrateSchema(db *gorm.DB) error {
 	return db.Transaction(func(tx *gorm.DB) error {
 		if tx.Dialector.Name() == "postgres" {