feat: migrate to CoinAnk API and improve chart UI

- Chart improvements: professional styling, popular symbols quick selection, simplified B/S legend
- Data source migration: use CoinAnk API exclusively for all kline data
- Code cleanup: remove Binance WebSocket cache and related code (websocket_client.go, combined_streams.go, monitor.go)
- Log optimization: reduce hook spam, suppress 404 errors, increase P&L diff threshold
- Lighter integration: add order sync functionality, fix market order precision
- Remove ticker merge logic for simplicity

trader/lighter_trader_v2_orders.go

@@ -113,37 +113,24 @@ func (t *LighterTraderV2) GetOrderStatus(symbol string, orderID string) (map[str
 
 	resp, err := t.client.Do(req)
 	if err != nil {
-		// If query fails, assume order is filled
-		return map[string]interface{}{
-			"orderId":     orderID,
-			"status":      "FILLED",
-			"avgPrice":    0.0,
-			"executedQty": 0.0,
-			"commission":  0.0,
-		}, nil
+		// ✅ 正确做法：查询失败返回错误，而不是假设成交
+		return nil, fmt.Errorf("failed to query order status: %w", err)
 	}
 	defer resp.Body.Close()
 
 	body, err := io.ReadAll(resp.Body)
 	if err != nil {
-		return map[string]interface{}{
-			"orderId":     orderID,
-			"status":      "FILLED",
-			"avgPrice":    0.0,
-			"executedQty": 0.0,
-			"commission":  0.0,
-		}, nil
+		return nil, fmt.Errorf("failed to read response body: %w", err)
+	}
+
+	// Check HTTP status code
+	if resp.StatusCode != 200 {
+		return nil, fmt.Errorf("API returned status %d: %s", resp.StatusCode, string(body))
 	}
 
 	var order OrderResponse
 	if err := json.Unmarshal(body, &order); err != nil {
-		return map[string]interface{}{
-			"orderId":     orderID,
-			"status":      "FILLED",
-			"avgPrice":    0.0,
-			"executedQty": 0.0,
-			"commission":  0.0,
-		}, nil
+		return nil, fmt.Errorf("failed to parse order response: %w, body: %s", err, string(body))
 	}
 
 	// Convert status to unified format