Add Ghostty terminal, session recovery, voice asset caching, and gitignore large assets

Integrates ghostty-web and node-pty packages, adds tmux session recovery on startup,
refactors WebSocket transport to noServer mode, caches Sherpa voice model assets via
service worker. Large assets (sherpa, ghostty-vt.wasm, fonts) are now gitignored as
they are copied from the webterm project.

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

vite.config.ts

@@ -39,7 +39,9 @@ export default defineConfig({
         categories: ['developer-tools', 'productivity'],
       },
       injectManifest: {
-        globPatterns: ['**/*.{js,css,html,ico,svg,woff2}', 'favicon-*.png', 'apple-touch-icon.png', 'badge-*.png', 'mascot/*.png'],
+        globPatterns: ['**/*.{js,css,html,ico,svg,woff2,wasm,ttf}', 'favicon-*.png', 'apple-touch-icon.png', 'badge-*.png', 'mascot/*.png'],
+        globIgnores: ['sherpa-moonshine-v2-base-en/**'],
+        maximumFileSizeToCacheInBytes: 5 * 1024 * 1024, // 5 MiB (font is ~2.6 MiB)
       },
     }),
   ],
@@ -60,9 +62,20 @@ export default defineConfig({
         ws: true,
         secure: false,
       },
+      '/terminal': {
+        target: 'wss://localhost:3456',
+        ws: true,
+        secure: false,
+      },
     },
   },
   build: {
     outDir: 'dist',
+    rollupOptions: {
+      external: ['node-pty'],
+    },
+  },
+  optimizeDeps: {
+    exclude: ['node-pty'],
   },
 });