feat: P1 合盘/星座/问答与测测完整设计包及模拟器取证工具

落地 synastry/star/ask API 与 H5 页面，补齐 cece-frontend-re complete-design 证据文档，并加入 Android 模拟器截图抓取脚本。

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

apps/api/internal/repository/imagecard_repo.go

@@ -0,0 +1,77 @@
+package repository
+
+import (
+	"context"
+	"errors"
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/jackc/pgx/v5"
+	"github.com/jackc/pgx/v5/pgxpool"
+)
+
+const imageCardDailyFree = 3
+
+// ImageCardRepo tracks daily draw quotas.
+type ImageCardRepo struct {
+	Pool *pgxpool.Pool
+}
+
+// UsedToday returns how many free draws used today.
+func (r *ImageCardRepo) UsedToday(ctx context.Context, userID uuid.UUID, day time.Time) (int, error) {
+	var n int
+	err := r.Pool.QueryRow(ctx, `
+		SELECT used FROM image_card_quotas
+		WHERE user_id=$1 AND day=$2::date`,
+		userID, day.Format("2006-01-02"),
+	).Scan(&n)
+	if errors.Is(err, pgx.ErrNoRows) {
+		return 0, nil
+	}
+	return n, err
+}
+
+// TryConsume increments today's used count when under free limit.
+// Returns remaining after consume. ErrQuotaExhausted when free tier is out.
+func (r *ImageCardRepo) TryConsume(ctx context.Context, userID uuid.UUID, day time.Time) (remaining int, err error) {
+	dayStr := day.Format("2006-01-02")
+	var used int
+	err = r.Pool.QueryRow(ctx, `
+		INSERT INTO image_card_quotas(user_id, day, used)
+		VALUES ($1, $2::date, 1)
+		ON CONFLICT (user_id, day) DO UPDATE
+		  SET used = image_card_quotas.used + 1
+		WHERE image_card_quotas.used < $3
+		RETURNING used`,
+		userID, dayStr, imageCardDailyFree,
+	).Scan(&used)
+	if errors.Is(err, pgx.ErrNoRows) {
+		return 0, ErrQuotaExhausted
+	}
+	if err != nil {
+		return 0, err
+	}
+	return imageCardDailyFree - used, nil
+}
+
+// RemainingToday without consuming.
+func (r *ImageCardRepo) RemainingToday(ctx context.Context, userID uuid.UUID, day time.Time, unlimited bool) (int, error) {
+	if unlimited {
+		return 99, nil
+	}
+	used, err := r.UsedToday(ctx, userID, day)
+	if err != nil {
+		return 0, err
+	}
+	left := imageCardDailyFree - used
+	if left < 0 {
+		left = 0
+	}
+	return left, nil
+}
+
+// DailyFreeLimit is the free-tier cap.
+func DailyFreeLimit() int { return imageCardDailyFree }
+
+// ErrQuotaExhausted means free daily draws are used up.
+var ErrQuotaExhausted = errors.New("今日免费次数已用完")