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/src/style.css

@@ -0,0 +1,30 @@
+@tailwind base;
+@tailwind components;
+@tailwind utilities;
+
+@layer components {
+  .card {
+    @apply rounded-xl border border-edge bg-panel p-4 shadow;
+  }
+  .label {
+    @apply text-xs uppercase tracking-wide text-slate-400;
+  }
+  .value {
+    @apply text-2xl font-semibold tabular-nums;
+  }
+  .btn {
+    @apply rounded-lg px-3 py-1.5 text-sm font-medium transition disabled:cursor-not-allowed disabled:opacity-40;
+  }
+  .btn-primary {
+    @apply btn bg-emerald-500 text-slate-900 hover:bg-emerald-400;
+  }
+  .btn-danger {
+    @apply btn bg-rose-500 text-white hover:bg-rose-400;
+  }
+  .btn-muted {
+    @apply btn border border-edge text-slate-200 hover:bg-slate-700;
+  }
+  .input {
+    @apply w-full rounded-lg border border-edge bg-surface px-2 py-1.5 text-sm text-slate-100 outline-none focus:border-emerald-400;
+  }
+}