Initial scaffold: Go backend, React frontend, Docker Compose

- Go backend: config, db (PostgreSQL migrations), auth (argon2id + sessions),
  middleware (cookie sessions, RequireAuth), chi router, cmd/server
- React frontend: Vite + React 18 + TS + Tailwind + Gruvbox palette + terminal CSS
- Docker: compose.yml (Postgres, Valkey, minio, LiveKit, coturn, Caddy),
  livekit.yaml, Caddyfile, Dockerfile (multi-stage Go+Node+Alpine)
- .env.example, .gitignore, README.md

web/tailwind.config.js

@@ -0,0 +1,37 @@
+/** @type {import('tailwindcss').Config} */
+export default {
+  content: [
+    "./index.html",
+    "./src/**/*.{js,ts,jsx,tsx}",
+  ],
+  theme: {
+    extend: {
+      colors: {
+        'gb-bg-h': '#1d2021',
+        'gb-bg': '#282828',
+        'gb-bg-s': '#3c3836',
+        'gb-bg-t': '#504945',
+        'gb-bg-f': '#32302f',
+        'gb-fg': '#ebdbb2',
+        'gb-fg-s': '#d5c4a1',
+        'gb-fg-t': '#bdae93',
+        'gb-fg-f': '#a89984',
+        'gb-red': '#fb4934',
+        'gb-green': '#b8bb26',
+        'gb-yellow': '#fabd2f',
+        'gb-blue': '#83a598',
+        'gb-purple': '#d3869b',
+        'gb-aqua': '#8ec07c',
+        'gb-orange': '#fe8019',
+        'gb-gray': '#928374',
+      },
+      fontFamily: {
+        mono: ['"JetBrains Mono"', '"Fira Code"', '"Cascadia Code"', '"SF Mono"', 'Consolas', '"Liberation Mono"', 'monospace'],
+      },
+      fontSize: {
+        'xxs': '11px',
+      },
+    },
+  },
+  plugins: [],
+}