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

web/src/components/common/DeepVoidBackground.tsx

@@ -9,32 +9,17 @@ interface DeepVoidBackgroundProps extends React.HTMLAttributes<HTMLDivElement> {
 export function DeepVoidBackground({ children, className = '', disableAnimation = false, ...props }: DeepVoidBackgroundProps) {
     return (
         <div className={`relative w-full min-h-screen bg-nofx-bg text-nofx-text overflow-hidden flex flex-col ${className}`} {...props}>
-            {/* Background layers: use a much lighter static stack when animations are disabled */}
+            {/* Background layers: neutralized to a plain cream surface for the light theme */}
             {disableAnimation ? (
                 <>
-                    <div className="absolute inset-0 pointer-events-none z-0 bg-[radial-gradient(circle_at_top,rgba(240,185,11,0.08),transparent_38%),linear-gradient(180deg,rgba(12,14,20,0.98),rgba(8,10,15,1))]"></div>
-                    <div className="absolute inset-0 pointer-events-none z-0 opacity-[0.035] bg-[linear-gradient(to_right,#80808012_1px,transparent_1px),linear-gradient(to_bottom,#80808012_1px,transparent_1px)] bg-[size:36px_36px]"></div>
+                    <div className="absolute inset-0 pointer-events-none z-0 bg-nofx-bg"></div>
+                    <div className="absolute inset-0 pointer-events-none z-0 opacity-[0.035] bg-[linear-gradient(to_right,rgba(26,24,19,0.08)_1px,transparent_1px),linear-gradient(to_bottom,rgba(26,24,19,0.08)_1px,transparent_1px)] bg-[size:36px_36px]"></div>
                 </>
             ) : (
                 <>
-                    {/* 1. Grain/Noise Texture */}
-                    <div className="absolute inset-0 bg-[url('https://grainy-gradients.vercel.app/noise.svg')] opacity-20 mix-blend-soft-light pointer-events-none fixed z-0"></div>
-
-                    {/* 2. Grid System */}
+                    {/* Faint grid system on cream */}
                     <div className="absolute inset-0 pointer-events-none fixed z-0">
-                        <div className="absolute inset-x-0 bottom-0 h-[50vh] bg-[linear-gradient(to_right,#80808012_1px,transparent_1px),linear-gradient(to_bottom,#80808012_1px,transparent_1px)] bg-[size:40px_40px] [mask-image:radial-gradient(ellipse_60%_50%_at_50%_0%,#000_70%,transparent_100%)] opacity-50" style={{ transform: 'perspective(500px) rotateX(60deg) translateY(100px) scale(2)' }}></div>
-                        <div className="absolute inset-0 bg-grid-pattern opacity-[0.03]"></div>
-                    </div>
-
-                    {/* 3. Ambient Glow Spots */}
-                    <div className="absolute inset-0 overflow-hidden pointer-events-none fixed z-0">
-                        <div className="absolute top-[-10%] left-[-10%] w-[40vw] h-[40vw] bg-nofx-gold/10 rounded-full blur-[120px] mix-blend-screen animate-pulse-slow"></div>
-                        <div className="absolute bottom-[-10%] right-[-10%] w-[40vw] h-[40vw] bg-nofx-accent/5 rounded-full blur-[120px] mix-blend-screen animate-pulse-slow" style={{ animationDelay: '2s' }}></div>
-                    </div>
-
-                    {/* 4. CRT/Scanline Overlay */}
-                    <div className="absolute inset-0 pointer-events-none fixed z-[9999] opacity-40">
-                        <div className="absolute inset-0 bg-[linear-gradient(rgba(18,16,16,0)_50%,rgba(0,0,0,0.25)_50%),linear-gradient(90deg,rgba(255,0,0,0.06),rgba(0,255,0,0.02),rgba(0,0,255,0.06))] bg-[length:100%_4px,3px_100%] pointer-events-none"></div>
+                        <div className="absolute inset-x-0 bottom-0 h-[50vh] bg-[linear-gradient(to_right,rgba(26,24,19,0.07)_1px,transparent_1px),linear-gradient(to_bottom,rgba(26,24,19,0.07)_1px,transparent_1px)] bg-[size:40px_40px] [mask-image:radial-gradient(ellipse_60%_50%_at_50%_0%,#000_70%,transparent_100%)] opacity-50" style={{ transform: 'perspective(500px) rotateX(60deg) translateY(100px) scale(2)' }}></div>
                     </div>
                 </>
             )}