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>

exchange/binance.go

@@ -4,39 +4,50 @@ import (
 	"encoding/json"
 	"fmt"
 	"log"
-	"strconv"
+	"math"
 	"strings"
 	"time"
 )
 
+// BinanceWS connects to Binance WS for ticker data.
+// Splits symbols across multiple combined-stream connections.
 type BinanceWS struct {
-	Tracked []string
+	Tracked     []string
+	connections int
 }
 
 func NewBinanceWS(tracked []string) *BinanceWS {
-	return &BinanceWS{Tracked: tracked}
+	conns := int(math.Ceil(float64(len(tracked)) / 60))
+	if conns < 1 {
+		conns = 1
+	}
+	if conns > 10 {
+		conns = 10
+	}
+	return &BinanceWS{Tracked: tracked, connections: conns}
 }
-// Run connects to Binance WS and streams bookTicker data.
-func (b *BinanceWS) Run(updateFn func(coin string, price, bid, ask float64)) error {
+
+func (b *BinanceWS) runSingle(symbols []string, connIdx int, updateFn func(coin string, price, bid, ask float64)) error {
 	streams := ""
-	for i, sym := range b.Tracked {
+	for i, sym := range symbols {
 		if i > 0 {
 			streams += "/"
 		}
 		streams += fmt.Sprintf("%s@bookTicker", strings.ToLower(sym))
 	}
-	url := fmt.Sprintf("wss://fstream.binance.com/stream?streams=%s", streams)
 
-	conn := NewPriceConnector(url, "Binance", 120*time.Second, 30*time.Second)
-	conn.PingInterval = 45 * time.Second
+	url := fmt.Sprintf("wss://fstream.binance.com/stream?streams=%s", streams)
+	name := fmt.Sprintf("Binance-%d", connIdx)
+
+	conn := NewPriceConnector(url, name, 60*time.Second, 15*time.Second)
+	// No client-side pings — let the proxy handle keepalive
+	conn.PingInterval = 0
 
 	conn.OnConnect = func() {
-		log.Printf("[Binance WS] Connected")
+		log.Printf("[%s] Connected (%d symbols)", name, len(symbols))
 	}
 
 	conn.OnMessage = func(msg []byte) {
-		// Combined stream: {"stream":"...","data":{...}}
-		// Navigate through "data" using map to avoid field name conflicts
 		var raw map[string]json.RawMessage
 		if err := json.Unmarshal(msg, &raw); err != nil {
 			return
@@ -46,12 +57,12 @@ func (b *BinanceWS) Run(updateFn func(coin string, price, bid, ask float64)) err
 			return
 		}
 
-		// Parse data object as flat map to extract fields by exact name
+		// Parse data as a generic map to avoid field name conflicts
+		// (bookTicker has both "b" bid price and "B" bid quantity)
 		var dataMap map[string]interface{}
 		if err := json.Unmarshal(dataRaw, &dataMap); err != nil {
 			return
 		}
-
 		symbol, _ := dataMap["s"].(string)
 		bidStr, _ := dataMap["b"].(string)
 		askStr, _ := dataMap["a"].(string)
@@ -59,13 +70,12 @@ func (b *BinanceWS) Run(updateFn func(coin string, price, bid, ask float64)) err
 			return
 		}
 
-		bid, err1 := strconv.ParseFloat(bidStr, 64)
-		ask, err2 := strconv.ParseFloat(askStr, 64)
-		if err1 != nil || err2 != nil || bid <= 0 || ask <= 0 {
+		bid := parseFloat(bidStr)
+		ask := parseFloat(askStr)
+		if bid <= 0 || ask <= 0 {
 			return
 		}
 
-		// Extract coin name (e.g., "BTCUSDT" -> "BTC")
 		coin := symbolToCoin(symbol, "USDT")
 		if coin == "" {
 			return
@@ -77,3 +87,31 @@ func (b *BinanceWS) Run(updateFn func(coin string, price, bid, ask float64)) err
 
 	return conn.Run()
 }
+
+func (b *BinanceWS) Run(updateFn func(coin string, price, bid, ask float64)) error {
+	if len(b.Tracked) == 0 {
+		return nil
+	}
+
+	n := b.connections
+	perConn := (len(b.Tracked) + n - 1) / n
+
+	errCh := make(chan error, n)
+	for i := 0; i < n; i++ {
+		start := i * perConn
+		end := start + perConn
+		if end > len(b.Tracked) {
+			end = len(b.Tracked)
+		}
+		if start >= end {
+			errCh <- nil
+			continue
+		}
+		batch := b.Tracked[start:end]
+		go func(idx int, syms []string) {
+			errCh <- b.runSingle(syms, idx, updateFn)
+		}(i+1, batch)
+	}
+
+	return <-errCh
+}