新增日内方向分析功能：基于三层打分数据由 AI 批量生成下一个交易日方向判断

web/backend/internal/store/futures.go

@@ -144,6 +144,126 @@ type Candle struct {
 	PreClose  float64 `json:"pre_close"`
 }
 
+// ── Daily Direction ────────────────────────────────────────────────
+
+// DailyDirection 日内方向分析结果。
+type DailyDirection struct {
+	ID             string  `json:"id"`
+	Symbol         string  `json:"symbol"`
+	TradeDate      string  `json:"trade_date"`
+	TargetDate     string  `json:"target_date"`
+	Direction      string  `json:"direction"`
+	Confidence     float64 `json:"confidence"`
+	Support        string  `json:"support"`     // JSONB → string
+	Resistance     string  `json:"resistance"`  // JSONB → string
+	Reasoning      string  `json:"reasoning"`
+	RiskNote       string  `json:"risk_note"`
+	PromptSnapshot string  `json:"prompt_snapshot,omitempty"`
+	CreatedAt      string  `json:"created_at"`
+}
+
+// EnsureDailyDirectionTable 建 daily_direction 表（幂等）。
+func (s *FuturesStore) EnsureDailyDirectionTable() error {
+	_, err := s.db.Exec(`
+		CREATE TABLE IF NOT EXISTS daily_direction (
+			id              UUID DEFAULT uuidv7() PRIMARY KEY,
+			symbol          TEXT NOT NULL,
+			trade_date      TEXT NOT NULL,
+			target_date     TEXT NOT NULL,
+			direction       TEXT NOT NULL,
+			confidence      REAL,
+			support         JSONB,
+			resistance      JSONB,
+			reasoning       TEXT,
+			risk_note       TEXT,
+			prompt_snapshot TEXT,
+			created_at      TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+			UNIQUE (symbol, trade_date)
+		)
+	`)
+	return err
+}
+
+// SaveDailyDirection 写入（upsert）一条方向分析。
+func (s *FuturesStore) SaveDailyDirection(dd *DailyDirection) error {
+	_, err := s.db.Exec(`
+		INSERT INTO daily_direction
+		(symbol, trade_date, target_date, direction, confidence, support, resistance, reasoning, risk_note, prompt_snapshot)
+		VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10)
+		ON CONFLICT (symbol, trade_date) DO UPDATE SET
+			target_date     = EXCLUDED.target_date,
+			direction       = EXCLUDED.direction,
+			confidence      = EXCLUDED.confidence,
+			support         = EXCLUDED.support,
+			resistance      = EXCLUDED.resistance,
+			reasoning       = EXCLUDED.reasoning,
+			risk_note       = EXCLUDED.risk_note,
+			prompt_snapshot = EXCLUDED.prompt_snapshot,
+			created_at      = CURRENT_TIMESTAMP
+	`, dd.Symbol, dd.TradeDate, dd.TargetDate, dd.Direction, dd.Confidence,
+		dd.Support, dd.Resistance, dd.Reasoning, dd.RiskNote, dd.PromptSnapshot)
+	return err
+}
+
+// ListDailyDirections 查询方向分析列表。
+func (s *FuturesStore) ListDailyDirections(symbol, start, end string, limit int) ([]DailyDirection, error) {
+	if limit <= 0 || limit > 500 {
+		limit = 50
+	}
+	q := `SELECT id, symbol, trade_date, target_date, direction, confidence,
+		COALESCE(support::text, '[]'), COALESCE(resistance::text, '[]'),
+		reasoning, risk_note, COALESCE(prompt_snapshot, ''),
+		COALESCE(created_at::text, '')
+		FROM daily_direction WHERE 1=1`
+	args := []any{}
+	n := 0
+	next := func() string { n++; return fmt.Sprintf("$%d", n) }
+	if symbol != "" {
+		q += " AND symbol = " + next()
+		args = append(args, symbol)
+	}
+	if start != "" {
+		q += " AND trade_date >= " + next()
+		args = append(args, start)
+	}
+	if end != "" {
+		q += " AND trade_date <= " + next()
+		args = append(args, end)
+	}
+	q += " ORDER BY trade_date DESC, symbol ASC LIMIT " + next()
+	args = append(args, limit)
+
+	rows, err := s.db.Query(q, args...)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	out := []DailyDirection{}
+	for rows.Next() {
+		var dd DailyDirection
+		if err := rows.Scan(&dd.ID, &dd.Symbol, &dd.TradeDate, &dd.TargetDate,
+			&dd.Direction, &dd.Confidence, &dd.Support, &dd.Resistance,
+			&dd.Reasoning, &dd.RiskNote, &dd.PromptSnapshot, &dd.CreatedAt); err != nil {
+			return nil, err
+		}
+		out = append(out, dd)
+	}
+	return out, rows.Err()
+}
+
+// GetActiveTsCode 通过 scores 表查找某品种在指定日期的活跃合约代码。
+func (s *FuturesStore) GetActiveTsCode(symbol, tradeDate string) (string, error) {
+	var tsCode string
+	err := s.db.QueryRow(
+		`SELECT ts_code FROM scores WHERE trade_date = $1 AND ts_code LIKE $2 || '%' ORDER BY ts_code DESC LIMIT 1`,
+		tradeDate, symbol,
+	).Scan(&tsCode)
+	if err != nil {
+		return "", fmt.Errorf("no active contract for %s on %s: %w", symbol, tradeDate, err)
+	}
+	return tsCode, nil
+}
+
 func (s *FuturesStore) ListCandles(tsCode, start, end string) ([]Candle, error) {
 	if tsCode == "" {
 		return nil, ErrMissingTsCode