feat: 小程序脚本首页重构 + 社交数据导入 + TTS 播放优化

- 后端：新增社交数据导入/审批/洞察生成 API（SocialContent/SocialInsight）
- 后端：优化脚本上下文服务，TTS 服务增强
- 小程序：重构脚本首页布局，新增社交导入页面
- 小程序：新增 useTtsPlayer composable，移除旧 ScriptAudioPlayer 组件
- 小程序：新增社交导入服务，优化请求服务
- SQL：新增社交数据导入建表脚本
- 文档：补充设计文档和实施计划

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

backend-single/src/main/java/com/emotion/entity/SocialProfileInsight.java

@@ -0,0 +1,58 @@
+package com.emotion.entity;
+
+import com.baomidou.mybatisplus.annotation.TableField;
+import com.baomidou.mybatisplus.annotation.TableName;
+import com.emotion.common.BaseEntity;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+import lombok.NoArgsConstructor;
+import lombok.experimental.SuperBuilder;
+
+import java.math.BigDecimal;
+import java.time.LocalDateTime;
+
+/**
+ * User-reviewable insight extracted from imported social content.
+ */
+@Data
+@EqualsAndHashCode(callSuper = true)
+@SuperBuilder
+@NoArgsConstructor
+@AllArgsConstructor
+@TableName("t_social_profile_insight")
+public class SocialProfileInsight extends BaseEntity {
+
+    @TableField("user_id")
+    private String userId;
+
+    @TableField("source_item_id")
+    private String sourceItemId;
+
+    @TableField("insight_type")
+    private String insightType;
+
+    @TableField("label")
+    private String label;
+
+    @TableField("summary")
+    private String summary;
+
+    @TableField("evidence_excerpt")
+    private String evidenceExcerpt;
+
+    @TableField("confidence")
+    private BigDecimal confidence;
+
+    @TableField("status")
+    private String status;
+
+    @TableField("user_edited")
+    private Integer userEdited;
+
+    @TableField("confirmed_at")
+    private LocalDateTime confirmedAt;
+
+    @TableField("deleted_at")
+    private LocalDateTime deletedAt;
+}