feat(skills): 技能管理 - 支持后台维护一级分类 (#694)

Co-authored-by: ddcat666 <26564566+ddcat666@users.noreply.github.com>

backend/internal/database/migrations.go

@@ -11,7 +11,7 @@ import (
 	"gorm.io/gorm"
 )
 
-const CurrentSchemaVersion int64 = 46
+const CurrentSchemaVersion int64 = 47
 
 const baselineSchemaChecksum = "sha256:open-ai-canvas-schema-v1-20260830"
 const schemaMigrationAppliedAtIndexChecksum = "sha256:schema-migrations-applied-at-index-v2-20260830"
@@ -147,6 +147,7 @@ var schemaMigrations = []migration{
 		return tx.AutoMigrate(&model.TopupProduct{}, &model.PaymentOrder{})
 	}},
 	{version: 46, name: "skill_curation", checksum: "sha256:skill-curation-v46-20261005", apply: migrateSkillCuration},
+	{version: 47, name: "skill_curation_roots", checksum: "sha256:skill-curation-roots-v47-20261005", apply: migrateSkillCurationRoots},
 }
 
 func migratePrefixedIDSequenceReconcile(tx *gorm.DB) error {

backend/internal/database/skill_curation_roots.go

@@ -0,0 +1,15 @@
+package database
+
+import (
+	"gorm.io/gorm"
+	"gorm.io/gorm/clause"
+	"infinite-canvas/backend/internal/model"
+)
+
+func migrateSkillCurationRoots(tx *gorm.DB) error {
+	if err := tx.AutoMigrate(&model.SkillCurationRoot{}, &model.SkillCurationRootAssignment{}); err != nil {
+		return err
+	}
+	roots := model.DefaultSkillCurationRoots()
+	return tx.Clauses(clause.OnConflict{DoNothing: true}).Create(&roots).Error
+}

backend/internal/database/skill_curation_roots_test.go

@@ -0,0 +1,53 @@
+package database
+
+import (
+	"gorm.io/driver/sqlite"
+	"gorm.io/gorm"
+	"infinite-canvas/backend/internal/model"
+	"path/filepath"
+	"testing"
+)
+
+func TestSkillCurationRootsMigration(t *testing.T) {
+	db, err := gorm.Open(sqlite.Open(filepath.Join(t.TempDir(), "roots.db")), &gorm.Config{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	sqlDB, _ := db.DB()
+	defer sqlDB.Close()
+	if err := db.Transaction(migrateSkillCuration); err != nil {
+		t.Fatal(err)
+	}
+	db.Create(&model.SkillCurationCategory{ID: "old", Name: "Existing", NormalizedName: "existing", RootTag: "drama", Enabled: true})
+	if err := db.Transaction(migrateSkillCurationRoots); err != nil {
+		t.Fatal(err)
+	}
+	var roots []model.SkillCurationRoot
+	db.Find(&roots)
+	if len(roots) != 5 {
+		t.Fatalf("neutral defaults: %d", len(roots))
+	}
+	db.Model(&model.SkillCurationRoot{}).Where("id = ?", "drama").Updates(map[string]any{"name": "Edited", "enabled": false})
+	if err := db.Transaction(migrateSkillCurationRoots); err != nil {
+		t.Fatal(err)
+	}
+	var root model.SkillCurationRoot
+	db.First(&root, "id = ?", "drama")
+	if root.Name != "Edited" || root.Enabled {
+		t.Fatal("migration overwrote root")
+	}
+	var category model.SkillCurationCategory
+	db.First(&category, "id = ?", "old")
+	if category.RootTag != "drama" {
+		t.Fatal("migration changed U39 categories")
+	}
+	found := false
+	for _, m := range schemaMigrations {
+		if m.version == 47 {
+			found = m.name == "skill_curation_roots" && m.checksum == "sha256:skill-curation-roots-v47-20261005"
+		}
+	}
+	if !found {
+		t.Fatal("migration 47 is not registered")
+	}
+}