feat(ECR-016): UserIntelligence 用户洞察只读切片并 Closed

聚合 GET /admin/users/:id/insight（报告类型/派生标签/行为快照），admin-h5 洞察 Tab；无 migration / 无 UGC / 无真支付。

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/api/internal/repository/user_insight_repo.go

@@ -0,0 +1,86 @@
+package repository
+
+import (
+	"context"
+	"time"
+
+	"github.com/google/uuid"
+)
+
+// ReportTypeCount aggregates growth_reports by type.
+type ReportTypeCount struct {
+	Type  string `json:"type"`
+	Count int    `json:"count"`
+}
+
+// BehaviorEventBrief is a recent analytics event for ops insight.
+type BehaviorEventBrief struct {
+	Name       string    `json:"name"`
+	PagePath   string    `json:"page_path,omitempty"`
+	ReceivedAt time.Time `json:"received_at"`
+}
+
+// CountReportsByType groups non-deleted reports for a user.
+func (r *AdminRepo) CountReportsByType(ctx context.Context, userID uuid.UUID) ([]ReportTypeCount, error) {
+	rows, err := r.Pool.Query(ctx, `
+		SELECT type, count(*)::int FROM growth_reports
+		WHERE user_id=$1 AND deleted_at IS NULL
+		GROUP BY type ORDER BY count(*) DESC, type ASC`, userID)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var out []ReportTypeCount
+	for rows.Next() {
+		var c ReportTypeCount
+		if err := rows.Scan(&c.Type, &c.Count); err != nil {
+			return nil, err
+		}
+		out = append(out, c)
+	}
+	return out, rows.Err()
+}
+
+// CountProfilesForUser returns active profile count.
+func (r *AdminRepo) CountProfilesForUser(ctx context.Context, userID uuid.UUID) (int, error) {
+	var n int
+	err := r.Pool.QueryRow(ctx, `
+		SELECT count(*)::int FROM profiles
+		WHERE user_id=$1 AND deleted_at IS NULL`, userID).Scan(&n)
+	return n, err
+}
+
+// CountAskThreadsForUser returns non-deleted ask threads.
+func (r *AdminRepo) CountAskThreadsForUser(ctx context.Context, userID uuid.UUID) (int, error) {
+	var n int
+	err := r.Pool.QueryRow(ctx, `
+		SELECT count(*)::int FROM ask_threads
+		WHERE user_id=$1 AND deleted_at IS NULL`, userID).Scan(&n)
+	return n, err
+}
+
+// ListRecentEventsForUser returns recent analytics events (may be empty).
+func (r *AdminRepo) ListRecentEventsForUser(ctx context.Context, userID uuid.UUID, limit int) ([]BehaviorEventBrief, error) {
+	if limit <= 0 || limit > 50 {
+		limit = 20
+	}
+	rows, err := r.Pool.Query(ctx, `
+		SELECT name, coalesce(page_path, ''), received_at
+		FROM analytics_events
+		WHERE user_id=$1
+		ORDER BY received_at DESC
+		LIMIT $2`, userID, limit)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var out []BehaviorEventBrief
+	for rows.Next() {
+		var e BehaviorEventBrief
+		if err := rows.Scan(&e.Name, &e.PagePath, &e.ReceivedAt); err != nil {
+			return nil, err
+		}
+		out = append(out, e)
+	}
+	return out, rows.Err()
+}