Initial commit: Pokerface sprint planning poker for Jira

Full-stack app with Express/Socket.io backend, React frontend,
NATS JetStream for state, and Atlassian Jira OAuth integration.

Includes security hardening: NATS auth support, KV bucket TTL
enforcement, CAS retry for race conditions, error message
sanitization, and OAuth state stored in NATS KV.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/vite.config.js

@@ -0,0 +1,22 @@
+import { defineConfig } from 'vite';
+import react from '@vitejs/plugin-react';
+import tailwindcss from '@tailwindcss/vite';
+
+export default defineConfig({
+  plugins: [react(), tailwindcss()],
+  server: {
+    port: 5174,
+    allowedHosts: true,
+    proxy: {
+      '/api': {
+        target: 'http://localhost:4010',
+        changeOrigin: true
+      },
+      '/socket.io': {
+        target: 'http://localhost:4010',
+        changeOrigin: true,
+        ws: true
+      }
+    }
+  }
+});