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/ui/src/lib/projectActionTerminal.ts

@@ -0,0 +1,26 @@
+import type { TerminalAPI } from './api/types';
+
+export const waitForTerminalExit = (
+  terminal: TerminalAPI,
+  sessionId: string,
+  timeoutMs: number,
+): Promise<boolean> => new Promise((resolve) => {
+  let settled = false;
+  let subscription: { close: () => void } | null = null;
+  let timeout: ReturnType<typeof setTimeout> | null = null;
+  const finish = (exited: boolean) => {
+    if (settled) return;
+    settled = true;
+    if (timeout) clearTimeout(timeout);
+    subscription?.close();
+    resolve(exited);
+  };
+  subscription = terminal.connect(sessionId, {
+    onEvent: (event) => {
+      if (event.type === 'exit' || (event.type === 'snapshot' && event.status === 'exited')) finish(true);
+    },
+    onError: (_error, fatal) => { if (fatal) finish(true); },
+  });
+  if (settled) subscription.close();
+  else timeout = setTimeout(() => finish(false), timeoutMs);
+});