feat(web): React SPA with realtime task detail over WebSocket

Vite + React 19 + TS console-style operator UI: hash-routed Login,
Endpoints, Tasks, and TaskDetail (realtime accounts table over /ws,
Run gated on all accounts testing ok on both sides).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MMHQTtnQtQqL8muAXHr9kd

web/vite.config.ts

@@ -0,0 +1,14 @@
+import { defineConfig } from 'vite'
+import react from '@vitejs/plugin-react'
+
+// https://vite.dev/config/
+export default defineConfig({
+  plugins: [react()],
+  build: { outDir: 'dist' },
+  server: {
+    proxy: {
+      '/api': 'http://localhost:8080',
+      '/ws': { target: 'ws://localhost:8080', ws: true },
+    },
+  },
+})