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/quality.go

@@ -2,6 +2,7 @@ package adminstore
 
 import (
 	"context"
+	"encoding/json"
 	"math"
 	"time"
 
@@ -58,35 +59,56 @@ func (s *Store) computeQuality(ctx context.Context, q queryer, productID string)
 	var netCanonical *float64
 	var ingredients *string
 	var hasNutri, hasImage bool
+	var kind string
+	var attributes []byte
 	err := q.QueryRow(ctx, `
 SELECT p.name, p.gtin, p.brand_id, p.category_id, p.net_content_canonical,
-       p.country_of_origin, f.ingredients_text,
+       p.country_of_origin, COALESCE(c.archive_kind, 'generic'), p.attributes,
+       f.ingredients_text,
        (f.nutriments IS NOT NULL AND f.nutriments::text <> '{}'),
        EXISTS (SELECT 1 FROM product_image pi WHERE pi.product_id = p.id)
-FROM product p LEFT JOIN food_detail f ON f.product_id = p.id
+FROM product p
+LEFT JOIN category c ON c.id = p.category_id
+LEFT JOIN food_detail f ON f.product_id = p.id
 WHERE p.id = $1`, productID).Scan(
 		&name, &gtin, &brandID, &categoryID, &netCanonical, &country,
-		&ingredients, &hasNutri, &hasImage)
+		&kind, &attributes, &ingredients, &hasNutri, &hasImage)
 	if err != nil {
 		return 0, err
 	}
 
+	attrs := map[string]any{}
+	if len(attributes) > 0 {
+		_ = json.Unmarshal(attributes, &attrs)
+	}
+	qualified, err := s.kindQualifiedKeys(ctx, s.pool)
+	if err != nil {
+		return 0, err
+	}
+	qkeys := qualified[kind]
+
+	known := map[string]bool{
+		"name":              name != nil && *name != "",
+		"gtin":              gtin != nil && *gtin != "",
+		"brand":             brandID != nil,
+		"category":          categoryID != nil,
+		"net_content":       netCanonical != nil,
+		"country_of_origin": country != nil && *country != "",
+		"nutriments":        hasNutri,
+		"ingredients":       ingredients != nil && *ingredients != "",
+		"image":             hasImage,
+	}
+	for _, k := range qkeys {
+		known[k] = attrPresent(attrs, k)
+	}
+	keys := completenessKeys(kind, qkeys)
 	present := 0
-	bump := func(ok bool) {
-		if ok {
+	for _, k := range keys {
+		if known[k] {
 			present++
 		}
 	}
-	bump(name != nil && *name != "")
-	bump(gtin != nil && *gtin != "")
-	bump(brandID != nil)
-	bump(categoryID != nil)
-	bump(netCanonical != nil)
-	bump(country != nil && *country != "")
-	bump(hasNutri)
-	bump(ingredients != nil && *ingredients != "")
-	bump(hasImage)
-	completeness := float64(present) / float64(len(CompletenessFields))
+	completeness := float64(present) / float64(len(keys))
 
 	var sourceCount int
 	var sourceTrust *float64