Restyle the web UI as a dark trading terminal

- Single palette (web/src/styles/palette.ts) taken from the Stitch
  design, exposed as ap-* UnoCSS colors and --ap-* CSS variables and
  used for Element Plus dark theme overrides, KLineChart and the news
  iframe; zero radius, JetBrains Mono / Space Grotesk bundled locally
- New sidebar and header layout; trading page, plan card and analysis
  drawer follow the design; other pages use the same panels
- Status API reports today's closed trades, wins and net PnL, shown as
  today's PnL and win rate on the trading page

web/pnpm-lock.yaml

@@ -11,6 +11,12 @@ importers:
       '@element-plus/icons-vue':
         specifier: ^2.3.2
         version: 2.3.2([email protected]([email protected]))
+      '@fontsource-variable/jetbrains-mono':
+        specifier: ^5.3.0
+        version: 5.3.0
+      '@fontsource-variable/space-grotesk':
+        specifier: ^5.3.0
+        version: 5.3.0
       axios:
         specifier: ^1.20.0
         version: 1.20.0([email protected])
@@ -303,6 +309,12 @@ packages:
   '@floating-ui/[email protected]':
     resolution: {integrity: sha512-HpCo8tmWzLVad5s2d19EhAz5zqrrQ6s69qd6moPMQvkOuSwDT1YgRfWSVuc4ennqrgv3OHppiOGMQ7oC13yIww==}
 
+  '@fontsource-variable/[email protected]':
+    resolution: {integrity: sha512-F32xpS2NsGYoQi2ADSkKTgpJj7ozajsGgDJ8woTnqjmIB+dxDIqImjl4pXZVEExu8UFZ2ndhmX18EBS/hdz3Lw==}
+
+  '@fontsource-variable/[email protected]':
+    resolution: {integrity: sha512-2IxmvfB08i9vnGB3Ym/AXvhRE+8XOjWMXIyDum03c+tPwH0FUoMNQfGpU8NXPxjbws0Vvss3AH0Zqt4oJBBAdw==}
+
   '@humanfs/[email protected]':
     resolution: {integrity: sha512-UhXNm+CFMWcbChXywFwkmhqjs3PRCmcSa/hfBgLIb7oQ5HNb1wS0icWsGtSAUNgefHeI+eBrA8I1fxmbHsGdvA==}
     engines: {node: '>=18.18.0'}
@@ -2889,6 +2901,10 @@ snapshots:
 
   '@floating-ui/[email protected]': {}
 
+  '@fontsource-variable/[email protected]': {}
+
+  '@fontsource-variable/[email protected]': {}
+
   '@humanfs/[email protected]':
     dependencies:
       '@humanfs/types': 0.15.0