Crypto trading bot: engine, brokers, backtester, dashboard, deploy

FastAPI backend with a single-strategy async engine, paper and Binance
brokers, pure-python indicators, a backtester that shares the engine's
portfolio math, and a Vue dashboard with a live WebSocket feed. Adds the
Gitea Actions CI/CD workflow that deploys to Traefik via docker_default.

frontend/tailwind.config.js

@@ -0,0 +1,14 @@
+/** @type {import('tailwindcss').Config} */
+export default {
+  content: ['./index.html', './src/**/*.{vue,js}'],
+  theme: {
+    extend: {
+      colors: {
+        surface: '#0f172a',
+        panel: '#1e293b',
+        edge: '#334155',
+      },
+    },
+  },
+  plugins: [],
+}