feat(terminal): refactor runtime and add mobile workspace (#2280)

Replace the legacy terminal flow with a shared authenticated WebSocket
runtime used across web, desktop, relay, and mobile surfaces.

- introduce the v3 terminal protocol with scoped attachments, snapshots,
  ordered output, bounded replay history, reconnects, and explicit lifecycle
- harden PTY creation, restart, resize, close, force-kill, idle cleanup,
  shell selection, login mode, environment sanitization, and appearance sync
- add runtime-aware terminal APIs with relay authentication and Electron parity
- add a fullscreen mobile terminal workspace with touch scrolling,
  long-press selection, safe-area controls, quick keys, and Ctrl/Alt input
- add terminal selection attachments, preview detection, project actions,
  shell settings, and localized UI
- harden Ghostty rendering, resize recovery, Unicode handling, block
  characters, line height, and stale-row behavior
- remove the obsolete terminal SSE path and update reverse-proxy guidance
- expand terminal runtime, transport, input, selection, and store coverage
- avoid duplicate web builds when preparing mobile assets in root CI builds

packages/web/server/lib/terminal/theme-response.test.js

@@ -0,0 +1,47 @@
+import { describe, expect, test } from 'vitest';
+import { consumeTerminalThemeQueries } from './theme-response.js';
+
+const lightAppearance = {
+  themeMode: 'light',
+  foreground: '#1b1b1b',
+  background: '#faf8f0',
+  modeEnabled: false,
+};
+
+describe('terminal theme responses', () => {
+  test('answers the complete OpenTUI startup handshake', () => {
+    const result = consumeTerminalThemeQueries(
+      '',
+      '\u001b[?2031h\u001b]10;?\u001b\\\u001b]11;?\u001b\\\u001b[?2031$p',
+      lightAppearance,
+    );
+    expect(result).toEqual({
+      pending: '',
+      modeEnabled: true,
+      responses: [
+        '\u001b]10;rgb:1b1b/1b1b/1b1b\u001b\\',
+        '\u001b]11;rgb:fafa/f8f8/f0f0\u001b\\',
+        '\u001b[?2031;1$y',
+      ],
+    });
+  });
+
+  test('handles a query split across PTY output chunks without duplicating it', () => {
+    const first = consumeTerminalThemeQueries('', '\u001b]11;', { ...lightAppearance, themeMode: 'dark' });
+    const second = consumeTerminalThemeQueries(first.pending, '?\u001b\\', { ...lightAppearance, themeMode: 'dark', modeEnabled: first.modeEnabled });
+    const third = consumeTerminalThemeQueries(second.pending, 'x', { ...lightAppearance, themeMode: 'dark', modeEnabled: second.modeEnabled });
+    expect(second.responses).toEqual(['\u001b]11;rgb:fafa/f8f8/f0f0\u001b\\']);
+    expect(second.pending).toBe('');
+    expect(third.responses).toEqual([]);
+  });
+
+  test('answers every repeated query in wire order', () => {
+    const result = consumeTerminalThemeQueries('', '\u001b[?996n\u001b[?996n\u001b]10;?\u0007\u001b]10;?\u0007', lightAppearance);
+    expect(result.responses).toEqual([
+      '\u001b[?997;2n',
+      '\u001b[?997;2n',
+      '\u001b]10;rgb:1b1b/1b1b/1b1b\u001b\\',
+      '\u001b]10;rgb:1b1b/1b1b/1b1b\u001b\\',
+    ]);
+  });
+});