feat(session,mobile): auto-resume on usage limit + mobile view fixes

Auto-resume on usage limit ("token pause" control, opt-in checkbox at the
top of the Respawn tab, off by default):
- usage-limit-patterns.ts (new, pure): detects all Claude Code limit
  messages (1.0.x-2.1.x eras incl. "5-hour limit reached - resets 8pm",
  "You've hit your limit - resets 1:40pm (TZ)", weekly date forms, raw
  "usage limit reached|<epoch>") and parses the reset time. Conservative:
  no parseable future reset time, no action.
- SessionAutoOps: arms a timer at reset+2min, sends Esc (dismisses the
  rate-limit dialog) + "continue"; dedups footer redraws, retries every
  5min on stale times, cancels when Claude starts working, persists and
  re-arms across Codeman restarts (SessionState.autoResumeEnabled/At).
- Respawn guard: cycles are blocked while limit-paused so /clear cannot
  wipe the paused conversation (respawnBlocked reason 'usage_limit').
- POST /api/sessions/:id/auto-resume; SSE session:limitPauseScheduled/
  limitResume/limitResumeCancelled; toasts + status line in the modal.
- Respawn tab tidied: single-row prompt fields, merged behavior row.

Mobile fixes (0.9.8 regressions, user-reported):
- Resize arbitration is now activity-based: a desktop sizing claim only
  blocks phone resizes while the desktop typed within 90s
  (Session.DESKTOP_CLAIM_IDLE_MS). Idle desktop -> phone takes the pane;
  next desktop keystroke re-asserts the desktop layout server-side
  (noteDesktopActivity via ws-routes input). Phones re-send dims every
  30s (visible tab only, skipped while the keyboard is open) so attaching
  under a hot claim self-corrects. Fixes the desktop-width-stream-in-
  narrow-xterm soup (mid-word wraps, tmux dot fill, Ink overdraw).
- Cross-device reflows (takeover/re-assert) emit a debounced needsRefresh
  so all clients reload the buffer instead of stacking ghost Ink frames.
- Keyboard accessory/toolbar lift restored: measure keyboardOffset
  against window.innerHeight (layout viewport), not the shrunken .app -
  on iOS the offset computed to 0, leaving both bars hidden behind the
  OS keyboard with a dead gap above.
- Removed the mobile header utility ("three dots") toggle entirely;
  the headerRight tray stays collapsed on small viewports.

Tests: usage-limit-patterns (36), session-auto-resume (21), resize
arbitration (+6), session routes (+4), respawn guard (+2); MockSession
auto-resume/sizing stubs; mobile tabs test updated for toggle removal.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

test/session-resize-arbitration.test.ts

@@ -1,6 +1,9 @@
-import { describe, expect, it, vi } from 'vitest';
+import { afterEach, describe, expect, it, vi } from 'vitest';
 import { Session } from '../src/session.js';
 
+/** Must exceed Session.DESKTOP_CLAIM_IDLE_MS (90s) */
+const PAST_IDLE_MS = 91_000;
+
 type ResizeableSessionInternals = {
   ptyProcess: { resize: (cols: number, rows: number) => void };
   _ptyCols: number;
@@ -109,4 +112,100 @@ describe('Session resize arbitration', () => {
 
     expect(resize).toHaveBeenCalledWith(100, 30);
   });
+
+  describe('idle-desktop override (whoever is active wins)', () => {
+    afterEach(() => {
+      vi.useRealTimers();
+    });
+
+    it('lets a mobile client take the pane once the desktop claim goes idle', () => {
+      vi.useFakeTimers();
+      const session = new Session({ workingDir: '/tmp', mode: 'shell' });
+      const resize = attachFakePty(session, 160, 48);
+
+      session.claimDesktopSizing(Symbol('desktop-conn'));
+      session.resize(48, 28, { viewportType: 'mobile' });
+      expect(resize).not.toHaveBeenCalled(); // fresh claim → ignored
+
+      vi.advanceTimersByTime(PAST_IDLE_MS);
+      session.resize(48, 28, { viewportType: 'mobile' });
+      expect(resize).toHaveBeenCalledWith(48, 28); // idle desktop → applied
+    });
+
+    it('keeps blocking mobile while the desktop stays active via typed input', () => {
+      vi.useFakeTimers();
+      const session = new Session({ workingDir: '/tmp', mode: 'shell' });
+      const resize = attachFakePty(session, 160, 48);
+
+      session.claimDesktopSizing(Symbol('desktop-conn'));
+      vi.advanceTimersByTime(PAST_IDLE_MS - 10_000);
+      session.noteDesktopActivity(); // user typed on desktop
+      vi.advanceTimersByTime(20_000); // idle since claim, but not since input
+
+      session.resize(48, 28, { viewportType: 'mobile' });
+      expect(resize).not.toHaveBeenCalled();
+    });
+
+    it('re-asserts the desktop layout on desktop input after a mobile override', () => {
+      vi.useFakeTimers();
+      const session = new Session({ workingDir: '/tmp', mode: 'shell' });
+      const resize = attachFakePty(session, 160, 48);
+
+      session.resize(208, 45, { viewportType: 'desktop' }); // desktop sizes the pane
+      session.claimDesktopSizing(Symbol('desktop-conn'));
+      vi.advanceTimersByTime(PAST_IDLE_MS);
+
+      session.resize(48, 28, { viewportType: 'mobile' }); // phone takes over
+      expect(resize).toHaveBeenLastCalledWith(48, 28);
+
+      session.noteDesktopActivity(); // desktop user types again
+      expect(resize).toHaveBeenLastCalledWith(208, 45); // layout restored
+    });
+
+    it('does not re-assert when no mobile override happened', () => {
+      const session = new Session({ workingDir: '/tmp', mode: 'shell' });
+      const resize = attachFakePty(session, 160, 48);
+
+      session.resize(208, 45, { viewportType: 'desktop' });
+      resize.mockClear();
+      session.noteDesktopActivity();
+      expect(resize).not.toHaveBeenCalled();
+    });
+
+    it('emits needsRefresh after a mobile takeover and after a desktop re-assert', () => {
+      vi.useFakeTimers();
+      const session = new Session({ workingDir: '/tmp', mode: 'shell' });
+      attachFakePty(session, 160, 48);
+      const refresh = vi.fn();
+      session.on('needsRefresh', refresh);
+
+      session.resize(208, 45, { viewportType: 'desktop' });
+      session.claimDesktopSizing(Symbol('desktop-conn'));
+      vi.advanceTimersByTime(800);
+      expect(refresh).not.toHaveBeenCalled(); // plain desktop resize: no refresh
+
+      vi.advanceTimersByTime(PAST_IDLE_MS);
+      session.resize(48, 28, { viewportType: 'mobile' }); // takeover
+      vi.advanceTimersByTime(800);
+      expect(refresh).toHaveBeenCalledTimes(1);
+
+      session.noteDesktopActivity(); // re-assert to 208x45
+      vi.advanceTimersByTime(800);
+      expect(refresh).toHaveBeenCalledTimes(2);
+    });
+
+    it('does not emit needsRefresh for ordinary single-device resizes', () => {
+      vi.useFakeTimers();
+      const session = new Session({ workingDir: '/tmp', mode: 'shell' });
+      attachFakePty(session, 160, 48);
+      const refresh = vi.fn();
+      session.on('needsRefresh', refresh);
+
+      session.resize(48, 28, { viewportType: 'mobile' }); // mobile-only, no claims
+      session.resize(208, 45, { viewportType: 'desktop' });
+      session.resize(100, 30); // untyped
+      vi.advanceTimersByTime(1000);
+      expect(refresh).not.toHaveBeenCalled();
+    });
+  });
 });