feat: 添加OKX行情接入+趋势检测+累积变动系统+界面重构

- 新增OKX WebSocket行情连接器，扩展4交易所价格监控
- 新增z-score趋势检测引擎(TrendDetector)，识别价格异动/趋势启动
- 新增累积变动跟踪(CumulativeTracker)，基于1min/5min多交易所共识
- 趋势事件和累积变动事件持久化到SQLite
- 新增Binance/OKX动量检测字段，扩展前端动量卡片至15列
- 迁移至macOS(darwin-arm64)，更新前端依赖
- Dashboard网格重构：非交易卡片置顶，交易卡片置底
- TrackedCoin添加OK字段，添加ExBinance/ExOKX常量
- 前端新增趋势检测卡片、趋势历史卡片、累积变动卡片

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

config.go

@@ -52,6 +52,17 @@ type Config struct {
 	// Entry sanity check: reject if price moved beyond this % in the wrong direction
 	ReversalTolerancePct float64
 
+	// Momentum scanning mode
+	MomentumEnabled      bool
+	MomentumThresholdPct float64
+
+	// Trend detection mode
+	TrendEnabled       bool
+	TrendBaselineWindow int     // ticks for EMA volatility baseline (default: 600 = 30s)
+	TrendAnomalyMul    float64 // z-score multiplier for alert threshold (default: 3.0)
+	TrendConfirmTicks  int     // ticks needed for state confirmation (default: 3)
+	TrendAlertCooldown int64   // ms cooldown between alerts for same coin (default: 60000)
+
 	// Bitget API
 	BitgetAPIKey     string
 	BitgetAPISecret  string
@@ -79,6 +90,17 @@ type jsonConfig struct {
 	InitialCapital   float64  `json:"initial_capital"`
 	ExcludedCoins    []string `json:"excluded_coins"`
 
+	// Momentum scanning
+	MomentumEnabled      bool    `json:"momentum_enabled"`
+	MomentumThresholdPct float64 `json:"momentum_threshold_pct"`
+
+	// Trend detection
+	TrendEnabled        bool    `json:"trend_enabled"`
+	TrendBaselineWindow int     `json:"trend_baseline_window"`
+	TrendAnomalyMul     float64 `json:"trend_anomaly_mul"`
+	TrendConfirmTicks   int     `json:"trend_confirm_ticks"`
+	TrendAlertCooldown  int64   `json:"trend_alert_cooldown_ms"`
+
 	// New: exchange fees
 	TakerFeeBitget      float64 `json:"taker_fee_bitget"`
 	TakerFeeHyperLiquid float64 `json:"taker_fee_hyperliquid"`
@@ -158,6 +180,17 @@ func LoadConfig() *Config {
 
 		ExcludedCoins: jsonCfg.ExcludedCoins,
 
+		// Momentum scanning
+		MomentumEnabled:      getBool("MOMENTUM_ENABLED", jsonCfg.MomentumEnabled),
+		MomentumThresholdPct: getFloat("MOMENTUM_THRESHOLD_PCT", jsonCfg.MomentumThresholdPct),
+
+		// Trend detection
+		TrendEnabled:        getBool("TREND_ENABLED", jsonCfg.TrendEnabled),
+		TrendBaselineWindow: int(getFloat("TREND_BASELINE_WINDOW", float64(jsonCfg.TrendBaselineWindow))),
+		TrendAnomalyMul:     getFloat("TREND_ANOMALY_MUL", jsonCfg.TrendAnomalyMul),
+		TrendConfirmTicks:   int(getFloat("TREND_CONFIRM_TICKS", float64(jsonCfg.TrendConfirmTicks))),
+		TrendAlertCooldown:  int64(getFloat("TREND_ALERT_COOLDOWN_MS", float64(jsonCfg.TrendAlertCooldown))),
+
 		BitgetAPIKey:     getEnv("BITGET_API_KEY", ""),
 		BitgetAPISecret:  getEnv("BITGET_API_SECRET", ""),
 		BitgetPassphrase: getEnv("BITGET_PASSPHRASE", ""),
@@ -194,6 +227,15 @@ func loadJSONConfig() jsonConfig {
 		// Scale-in parameters
 		ScaleStepPct:     0.10, // 0.10% spread widening per scale level
 		ScaleCooldownSec: 5,    // 5 seconds between scales
+
+		// Momentum scanning
+		MomentumThresholdPct: 0.25, // 0.25% change flags momentum
+
+		// Trend detection
+		TrendBaselineWindow: 600,  // ~30s at 50ms tick
+		TrendAnomalyMul:     3.0,  // 3 sigma z-score threshold
+		TrendConfirmTicks:   3,    // 3 consecutive ticks for confirmation
+		TrendAlertCooldown:  60000, // 1 min cooldown
 	}
 
 	data, err := os.ReadFile("config.json")
@@ -267,11 +309,31 @@ func loadJSONConfig() jsonConfig {
 		def.ExcludedCoins = cfg.ExcludedCoins
 	}
 
+	if cfg.MomentumThresholdPct != 0 {
+		def.MomentumThresholdPct = cfg.MomentumThresholdPct
+	}
+
+	// Trend detection JSON overrides
+	if cfg.TrendBaselineWindow != 0 {
+		def.TrendBaselineWindow = cfg.TrendBaselineWindow
+	}
+	if cfg.TrendAnomalyMul != 0 {
+		def.TrendAnomalyMul = cfg.TrendAnomalyMul
+	}
+	if cfg.TrendConfirmTicks != 0 {
+		def.TrendConfirmTicks = cfg.TrendConfirmTicks
+	}
+	if cfg.TrendAlertCooldown != 0 {
+		def.TrendAlertCooldown = cfg.TrendAlertCooldown
+	}
+
 	// Boolean fields: zero default is false, so use OR logic
 	// When JSON has true → true || false = true (override)
 	// When JSON has false → false || false = false (keep default)
 	def.TestMode = cfg.TestMode || def.TestMode
 	def.TradeEnabled = cfg.TradeEnabled || def.TradeEnabled
+	def.MomentumEnabled = cfg.MomentumEnabled || def.MomentumEnabled
+	def.TrendEnabled = cfg.TrendEnabled || def.TrendEnabled
 
 	return def
 }