Add linked mini program functionality and enhance link tag handling

- Introduced `navigateToMiniProgramAppIdList` in app.json for mini program navigation.
- Updated link tag handling in the read page to support mini program keys and app IDs.
- Enhanced content parsing to include app ID and mini program key in link tags.
- Added linked mini programs management in the admin panel with API endpoints for CRUD operations.
- Improved UI for selecting linked mini programs in the content creation page.

soul-api/internal/handler/db.go

@@ -101,22 +101,40 @@ func GetPublicDBConfig(c *gin.Context) {
 	if _, has := out["userDiscount"]; !has {
 		out["userDiscount"] = float64(5)
 	}
-	// 链接标签列表（小程序 onLinkTagTap 需要知道 type，用于 ckb/miniprogram 的特殊处理）
+	// 链接标签列表（小程序 onLinkTagTap 需要 type；miniprogram 类型存 mpKey，用 key 查 linkedMiniprograms 得 appId）
 	var linkTagRows []model.LinkTag
 	if err := db.Order("label ASC").Find(&linkTagRows).Error; err == nil {
 		tags := make([]gin.H, 0, len(linkTagRows))
 		for _, t := range linkTagRows {
-			tags = append(tags, gin.H{
-				"tagId":    t.TagID,
-				"label":    t.Label,
-				"url":      t.URL,
-				"type":     t.Type,
-				"pagePath": t.PagePath,
-				"appId":    t.AppID,
-			})
+			h := gin.H{"tagId": t.TagID, "label": t.Label, "url": t.URL, "type": t.Type, "pagePath": t.PagePath}
+			if t.Type == "miniprogram" {
+				h["mpKey"] = t.AppID // miniprogram 类型时 AppID 列存的是密钥
+			} else {
+				h["appId"] = t.AppID
+			}
+			tags = append(tags, h)
 		}
 		out["linkTags"] = tags
 	}
+	// 关联小程序列表（key 为 32 位密钥，小程序用 key 查 appId 后 wx.navigateToMiniProgram）
+	var linkedMpRow model.SystemConfig
+	if err := db.Where("config_key = ?", "linked_miniprograms").First(&linkedMpRow).Error; err == nil && len(linkedMpRow.ConfigValue) > 0 {
+		var linkedList []gin.H
+		if err := json.Unmarshal(linkedMpRow.ConfigValue, &linkedList); err == nil && len(linkedList) > 0 {
+			// 确保每项有 key（兼容旧数据用 id 作为 key）
+			for _, m := range linkedList {
+				if k, _ := m["key"].(string); k == "" {
+					if id, _ := m["id"].(string); id != "" {
+						m["key"] = id
+					}
+				}
+			}
+			out["linkedMiniprograms"] = linkedList
+		}
+	}
+	if _, has := out["linkedMiniprograms"]; !has {
+		out["linkedMiniprograms"] = []gin.H{}
+	}
 	c.JSON(http.StatusOK, out)
 }