feat: 可扩展档案模式框架 + 内置 3C(电子) 模式

- 新增 category.archive_kind 与 kind_field 字段模板表（迁移 0010）
- 种子 electronics 字段模板 + 3C 品类树（手机/笔记本/平板等）
- 后端按档案模式动态计算完整度/合格：食品沿用 food_detail，
  其它模式走 product.attributes + kind_field
- 新增 GET /api/kind-fields?kind= 接口
- 后台编辑页按品类模式动态渲染规格参数表单
- 公开详情页/接口输出带标签的规格表

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

api/internal/adminstore/category.go

@@ -96,11 +96,12 @@ func (s *Store) CreateCategory(ctx context.Context, actor string, in CategoryInp
 
 	parentPath := ""
 	parentLevel := -1
+	kind := DefaultKind
 	var parentID *string
 	if pid := trimPtr(in.ParentID); pid != nil {
 		var path string
 		var level int
-		err := s.pool.QueryRow(ctx, "SELECT path::text, level FROM category WHERE id = $1", *pid).Scan(&path, &level)
+		err := s.pool.QueryRow(ctx, "SELECT path::text, level, archive_kind FROM category WHERE id = $1", *pid).Scan(&path, &level, &kind)
 		if errors.Is(err, pgx.ErrNoRows) {
 			return nil, ErrInvalidParent
 		}
@@ -119,11 +120,11 @@ func (s *Store) CreateCategory(ctx context.Context, actor string, in CategoryInp
 
 	var c Category
 	err := s.pool.QueryRow(ctx, `
-INSERT INTO category (name_zh, name_en, parent_id, path, gpc_brick_code, level)
-VALUES ($1, $2, $3, $4::ltree, $5, $6)
-RETURNING id, name_zh, name_en, path::text, level, parent_id::text, gpc_brick_code, 0`,
-		name, trimPtr(in.NameEN), parentID, path, trimPtr(in.GPCBrickCode), level).
-		Scan(&c.ID, &c.NameZH, &c.NameEN, &c.Path, &c.Level, &c.ParentID, &c.GPCBrickCode, &c.ProductCount)
+INSERT INTO category (name_zh, name_en, parent_id, path, gpc_brick_code, level, archive_kind)
+VALUES ($1, $2, $3, $4::ltree, $5, $6, $7)
+RETURNING id, name_zh, name_en, path::text, level, parent_id::text, gpc_brick_code, archive_kind, 0`,
+		name, trimPtr(in.NameEN), parentID, path, trimPtr(in.GPCBrickCode), level, kind).
+		Scan(&c.ID, &c.NameZH, &c.NameEN, &c.Path, &c.Level, &c.ParentID, &c.GPCBrickCode, &c.ArchiveKind, &c.ProductCount)
 	if isUniqueViolation(err) {
 		return nil, ErrDuplicatePath
 	}
@@ -273,10 +274,10 @@ func (s *Store) getCategory(ctx context.Context, id string) (*Category, error) {
 	var c Category
 	err := s.pool.QueryRow(ctx, `
 SELECT c.id, c.name_zh, c.name_en, c.path::text, c.level, c.parent_id::text,
-       c.gpc_brick_code,
+       c.gpc_brick_code, c.archive_kind,
        (SELECT count(*) FROM product p WHERE p.category_id = c.id)
 FROM category c WHERE c.id = $1`, id).
-		Scan(&c.ID, &c.NameZH, &c.NameEN, &c.Path, &c.Level, &c.ParentID, &c.GPCBrickCode, &c.ProductCount)
+		Scan(&c.ID, &c.NameZH, &c.NameEN, &c.Path, &c.Level, &c.ParentID, &c.GPCBrickCode, &c.ArchiveKind, &c.ProductCount)
 	if errors.Is(err, pgx.ErrNoRows) {
 		return nil, ErrNotFound
 	}