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/ask_repo.go

@@ -0,0 +1,104 @@
+package repository
+
+import (
+	"context"
+	"errors"
+
+	"github.com/google/uuid"
+	"github.com/jackc/pgx/v5"
+	"github.com/jackc/pgx/v5/pgxpool"
+
+	"github.com/yuxingu/digital-psychology/apps/api/internal/model"
+)
+
+// AskRepo persists ask threads and messages.
+type AskRepo struct {
+	Pool *pgxpool.Pool
+}
+
+// CreateThread inserts a thread bound to a profile.
+func (r *AskRepo) CreateThread(ctx context.Context, userID, profileID uuid.UUID, scene *string) (*model.AskThread, error) {
+	t := &model.AskThread{}
+	err := r.Pool.QueryRow(ctx, `
+		INSERT INTO ask_threads(user_id, profile_id, scene)
+		VALUES ($1,$2,$3)
+		RETURNING id, user_id, profile_id, scene, created_at`,
+		userID, profileID, scene,
+	).Scan(&t.ID, &t.UserID, &t.ProfileID, &t.Scene, &t.CreatedAt)
+	return t, err
+}
+
+// GetThreadForUser loads a thread owned by user.
+func (r *AskRepo) GetThreadForUser(ctx context.Context, userID, threadID uuid.UUID) (*model.AskThread, error) {
+	t := &model.AskThread{}
+	err := r.Pool.QueryRow(ctx, `
+		SELECT id, user_id, profile_id, scene, created_at
+		FROM ask_threads WHERE id=$1 AND user_id=$2 AND deleted_at IS NULL`,
+		threadID, userID,
+	).Scan(&t.ID, &t.UserID, &t.ProfileID, &t.Scene, &t.CreatedAt)
+	return t, err
+}
+
+// ListMessages returns messages in a thread (oldest first).
+func (r *AskRepo) ListMessages(ctx context.Context, threadID uuid.UUID) ([]model.AskMessage, error) {
+	rows, err := r.Pool.Query(ctx, `
+		SELECT id, thread_id, role, content, created_at
+		FROM ask_messages WHERE thread_id=$1 AND deleted_at IS NULL
+		ORDER BY created_at ASC`, threadID)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var out []model.AskMessage
+	for rows.Next() {
+		var m model.AskMessage
+		if err := rows.Scan(&m.ID, &m.ThreadID, &m.Role, &m.Content, &m.CreatedAt); err != nil {
+			return nil, err
+		}
+		out = append(out, m)
+	}
+	return out, rows.Err()
+}
+
+// InsertMessage stores one message.
+func (r *AskRepo) InsertMessage(ctx context.Context, threadID uuid.UUID, role, content string) (*model.AskMessage, error) {
+	m := &model.AskMessage{}
+	err := r.Pool.QueryRow(ctx, `
+		INSERT INTO ask_messages(thread_id, role, content)
+		VALUES ($1,$2,$3)
+		RETURNING id, thread_id, role, content, created_at`,
+		threadID, role, content,
+	).Scan(&m.ID, &m.ThreadID, &m.Role, &m.Content, &m.CreatedAt)
+	return m, err
+}
+
+// CountUserAssistantMessages counts all assistant replies for quota (free tier).
+func (r *AskRepo) CountUserAssistantMessages(ctx context.Context, userID uuid.UUID) (int, error) {
+	var n int
+	err := r.Pool.QueryRow(ctx, `
+		SELECT COUNT(*) FROM ask_messages m
+		JOIN ask_threads t ON t.id = m.thread_id
+		WHERE t.user_id=$1 AND m.role='assistant' AND m.deleted_at IS NULL AND t.deleted_at IS NULL`,
+		userID,
+	).Scan(&n)
+	return n, err
+}
+
+// ConsumeMembershipQuota decrements ask_quota_left when membership is active.
+// Returns false if no active membership or quota is already 0.
+func (r *AskRepo) ConsumeMembershipQuota(ctx context.Context, userID uuid.UUID) (ok bool, left int, err error) {
+	err = r.Pool.QueryRow(ctx, `
+		UPDATE memberships
+		SET ask_quota_left = ask_quota_left - 1, updated_at=now()
+		WHERE user_id=$1 AND status='active' AND expires_at > now()
+			AND deleted_at IS NULL AND ask_quota_left > 0
+		RETURNING ask_quota_left`, userID,
+	).Scan(&left)
+	if errors.Is(err, pgx.ErrNoRows) {
+		return false, 0, nil
+	}
+	if err != nil {
+		return false, 0, err
+	}
+	return true, left, nil
+}