feat(creator): 监控账号画像采集入库——粉丝/关注/获赞/作品数与作者介绍

抖音 profile/other 响应本就携带画像数据但被丢弃，同步链路也无回填。
- migration 1046: creator_competitor 增加 signature、total_favorited 列及非负约束
- douyin 解析层: TargetProfile 增加签名与计数，total_favorited 兼容字符串大数
- store: UpdateCompetitorProfile 改为画像回填（nil 计数保留原值）
- 同步链路: 作品采集成功后拉取 profile 回填，失败仅记日志不阻断

internal/controlplane/api/creator.go

@@ -1285,6 +1285,24 @@ func previewDouyinCompetitor(ctx context.Context, store *creator.Store, phaseASt
 	}, nil
 }
 
+// refreshCompetitorProfile 拉取抖音公开主页画像并回填监控账号画像字段。
+// profile/other 响应自带粉丝/关注/获赞/作品数与签名，此前未回填导致详情页画像恒为空。
+func refreshCompetitorProfile(ctx context.Context, store *creator.Store, browser creatorGatewayBrowser, competitor creator.Competitor) error {
+	profile, err := (douyin.CreatorCollector{Browser: browser}).ResolveTarget(ctx, competitor.PlatformAccountKey)
+	if err != nil {
+		return err
+	}
+	_, err = store.UpdateCompetitorProfile(ctx, competitor.ID, creator.CompetitorProfileUpdate{
+		AvatarURL:      profile.AvatarURL,
+		Signature:      profile.Signature,
+		FollowerCount:  profile.FollowerCount,
+		FollowingCount: profile.FollowingCount,
+		TotalFavorited: profile.TotalFavorited,
+		AwemeCount:     profile.AwemeCount,
+	})
+	return err
+}
+
 func syncCreatorCompetitor(ctx context.Context, store *creator.Store, hubStore *hub.Store, competitorID string) (creator.CollectionReport, error) {
 	return syncCreatorCompetitorWithClaim(ctx, store, hubStore, competitorID, true)
 }
@@ -1349,6 +1367,11 @@ func syncCreatorCompetitorWithClaim(ctx context.Context, store *creator.Store, h
 	}
 	report, collectErr := store.CollectSource(ctx, competitor.Platform, creator.SourceCompetitor, competitor.ID, collector, collectionNow)
 	if collectErr == nil {
+		// 采集成功后回填监控账号画像（粉丝/关注/获赞/作品数/作者介绍）；
+		// profile 拉取失败只记日志，不影响本次作品同步结果。
+		if profileErr := refreshCompetitorProfile(ctx, store, creatorGatewayBrowser{gateway: lease.gateway, environment: lease.environment}, competitor); profileErr != nil {
+			logrus.WithError(profileErr).WithField("competitor_id", competitorID).Warn("creator competitor profile refresh failed")
+		}
 		// 采集成功后把缺封面的作品封面缓存到本地（失败只记日志，不影响本次同步结果）。
 		if coverErr := cacheCompetitorWorkCovers(ctx, store, creatorGatewayBrowser{gateway: lease.gateway, environment: lease.environment}, competitor.ID); coverErr != nil {
 			logrus.WithError(coverErr).WithField("competitor_id", competitorID).Warn("creator competitor cover cache failed")