feat: cream terminal redesign, English-only UI, autopilot launch fixes

- Redesign dashboard into a cream-paper + vermilion IBM Plex Mono terminal
  (live L2 order book, cost/liq map, WS K-line, signal matrix, orchestration
  topology, risk radar, execution log, current positions, equity curve)
- Convert all user-facing UI and backend strings/prompts from Chinese to
  English (multi-language retained, default English)
- Add /api/statistics/full endpoint + full-stats frontend wiring
- Fix Autopilot launch: reuse the existing trader instead of creating
  duplicates (eliminates repeat ~35s create cost and stale-trader 404s);
  launch sends 5m scan interval
- Fix unreadable toasts: cream theme with high-contrast text + per-type accent
- Silence background dashboard polls (getTraderConfig) to stop error-toast spam

trader/auto_trader_throttle.go

@@ -12,9 +12,15 @@ import (
 const (
 	autopilotMinHoldDuration        = 45 * time.Minute
 	autopilotNoiseCloseHoldDuration = 90 * time.Minute
-	autopilotReentryCooldown        = 90 * time.Minute
-	autopilotMaxOpensPerHour        = 1
-	autopilotMaxOpensPerCycle       = 1
+	autopilotReentryCooldown        = 30 * time.Minute
+	// Allow one long + one short per cycle. The real exposure/churn limits are
+	// MaxPositions (concurrent) + the 45m min-hold + the 90m per-symbol reentry
+	// cooldown, so the per-hour cap only needs to be high enough not to block the
+	// directional pair from re-establishing after positions close. A tight value
+	// here (e.g. 2) starves the strategy: once a couple opens fire, every later
+	// cycle is blocked and the book drains to flat. Keep it generous.
+	autopilotMaxOpensPerHour        = 30
+	autopilotMaxOpensPerCycle       = 6
 	earlyCloseStopLossBypassPct     = -2.5
 	earlyCloseTakeProfitBypassPct   = 5.0
 	noiseCloseLossFloorPct          = -1.0