feat(canvas): 模型选择 - 支持彩色展示标签并优化目录与积分交互

backend/internal/database/channel_model_tags_test.go

@@ -0,0 +1,39 @@
+package database
+
+import (
+	"testing"
+
+	"infinite-canvas/backend/internal/model"
+)
+
+func TestChannelModelTagsMigration(t *testing.T) {
+	db, err := Open(Config{Driver: "sqlite", DSN: ":memory:"})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := db.Exec(`CREATE TABLE channel_models (id TEXT PRIMARY KEY, model_key TEXT, unit_price_microcredits INTEGER)`).Error; err != nil {
+		t.Fatal(err)
+	}
+	if err := db.Exec(`INSERT INTO channel_models VALUES ('a', 'test', 300000)`).Error; err != nil {
+		t.Fatal(err)
+	}
+	for i := 0; i < 2; i++ {
+		if err := migrateChannelModelTags(db); err != nil {
+			t.Fatal(err)
+		}
+	}
+	var row struct {
+		ModelKey              string
+		Tags                  string
+		UnitPriceMicrocredits int64
+	}
+	if err := db.Table("channel_models").Where("id = ?", "a").First(&row).Error; err != nil {
+		t.Fatal(err)
+	}
+	if row.Tags != "[]" || row.ModelKey != "test" || row.UnitPriceMicrocredits != 300000 {
+		t.Fatalf("migration changed data: %#v", row)
+	}
+	if !db.Migrator().HasColumn(&model.ChannelModel{}, "Tags") {
+		t.Fatal("tags column missing")
+	}
+}

backend/internal/database/migrations.go

@@ -11,7 +11,7 @@ import (
 	"gorm.io/gorm"
 )
 
-const CurrentSchemaVersion int64 = 31
+const CurrentSchemaVersion int64 = 32
 
 const baselineSchemaChecksum = "sha256:open-ai-canvas-schema-v1-20260830"
 const schemaMigrationAppliedAtIndexChecksum = "sha256:schema-migrations-applied-at-index-v2-20260830"
@@ -105,6 +105,14 @@ var schemaMigrations = []migration{
 	{version: 31, name: "tool_favorites", checksum: "sha256:tool-favorites-v31", apply: func(tx *gorm.DB) error {
 		return tx.AutoMigrate(&model.ToolFavorite{})
 	}},
+	{version: 32, name: "channel_model_tags", checksum: "sha256:channel-model-tags-v32", apply: migrateChannelModelTags},
+}
+
+func migrateChannelModelTags(tx *gorm.DB) error {
+	if tx.Migrator().HasColumn(&model.ChannelModel{}, "Tags") {
+		return nil
+	}
+	return tx.Migrator().AddColumn(&model.ChannelModel{}, "Tags")
 }
 
 func migrateChannelCreditCost(tx *gorm.DB) error {

backend/internal/database/migrations_test.go

@@ -11,6 +11,16 @@ import (
 	"gorm.io/gorm"
 )
 
+func TestCurrentSchemaVersionMatchesMigrationPlan(t *testing.T) {
+	if len(schemaMigrations) == 0 {
+		t.Fatal("migration plan is empty")
+	}
+	latest := schemaMigrations[len(schemaMigrations)-1].version
+	if CurrentSchemaVersion != latest {
+		t.Fatalf("supported schema version %d does not match latest migration %d", CurrentSchemaVersion, latest)
+	}
+}
+
 func TestMigrateSchemaRecordsAndValidatesVersion(t *testing.T) {
 	db, err := Open(Config{Driver: "sqlite", DSN: "file:migration-version?mode=memory&cache=shared"})
 	if err != nil {