feat: 重构为三所价差异动监控系统

删除 HyperLiquid + 全部交易功能，构建自适应 surge 检测器。
- 新增 surge_detector.go: 每币独立滚动窗口基线，检测三所价差异常飙升
- 新增 SpreadCard/SurgeCard 前端组件
- 保留 momentum/trend/cumulative/trend_filter 扫描功能
- 更新文档和配置以反映新系统

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

config.json

@@ -1,26 +1,17 @@
 {
-  "test_mode": false,
-  "trade_enabled": true,
   "arb_threshold": 0.3,
   "scan_interval_ms": 200,
-  "trade_threshold": 0.3,
-  "trade_amount_usd": 20,
-  "trade_cooldown_ms": 30000,
   "alert_cooldown_sec": 300,
-  "mock_slippage_pct": 0.05,
-  "max_positions": 1,
-  "blacklist_duration_sec": 3600,
-  "initial_capital": 1000,
-  "taker_fee_bitget": 0.060,
-  "taker_fee_hyperliquid": 0.045,
-  "take_profit_pct": 0.3,
-  "spread_reverse_exit_pct": 0,
-  "position_timeout_sec": 1800,
-  "leg_delay_ms": 300,
-  "reversal_tolerance_pct": 0.1,
-  "scale_step_pct": 0.3,
-  "scale_cooldown_sec": 5,
+  "surge_enabled": true,
+  "surge_window_size": 600,
+  "surge_baseline_multiplier": 3.0,
+  "surge_min_abs_spread_pct": 0.05,
+  "surge_cooldown_sec": 60,
   "momentum_enabled": true,
   "momentum_threshold_pct": 0.25,
-  "trend_enabled": true
+  "trend_enabled": true,
+  "trend_baseline_window": 600,
+  "trend_anomaly_mul": 3.0,
+  "trend_confirm_ticks": 3,
+  "trend_alert_cooldown_ms": 60000
 }