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>

src/web/routes/session-routes.ts

@@ -29,6 +29,7 @@ import {
   ResizeSchema,
   AutoClearSchema,
   AutoCompactSchema,
+  AutoResumeSchema,
   ImageWatcherSchema,
   FlickerFilterSchema,
   QuickRunSchema,
@@ -1003,6 +1004,27 @@ export function registerSessionRoutes(
     };
   });
 
+  // ========== Auto-Resume (usage-limit pause) ==========
+
+  app.post('/api/sessions/:id/auto-resume', async (req) => {
+    const { id } = req.params as { id: string };
+    const body = parseBody(AutoResumeSchema, req.body, 'Invalid request body');
+    const session = findSessionOrFail(ctx, id);
+
+    session.setAutoResume(body.enabled);
+    persistAndBroadcastSession(ctx, session);
+
+    return {
+      success: true,
+      data: {
+        autoResume: {
+          enabled: session.autoResumeEnabled,
+          resumeAt: session.autoResumeAt ?? undefined,
+        },
+      },
+    };
+  });
+
   // ========== Image Watcher ==========
 
   app.post('/api/sessions/:id/image-watcher', async (req) => {

src/web/routes/ws-routes.ts

@@ -114,6 +114,7 @@ export function registerWsRoutes(app: FastifyInstance, ctx: SessionPort, getHost
     // can ignore small-viewport resizes only while a desktop is actually
     // connected (see Session._desktopSizeClaims).
     const sizingToken = Symbol('ws-desktop-sizing');
+    let holdsDesktopClaim = false;
 
     // Attach message handler synchronously BEFORE any async work
     // (@fastify/websocket requirement to avoid dropped messages).
@@ -122,6 +123,9 @@ export function registerWsRoutes(app: FastifyInstance, ctx: SessionPort, getHost
         const msg = JSON.parse(String(raw));
         if (msg.t === 'i' && typeof msg.d === 'string') {
           if (msg.d.length > MAX_INPUT_LENGTH) return;
+          // Typed input from a claim-holding desktop keeps the claim "hot"
+          // and re-asserts the desktop layout after a mobile override.
+          if (holdsDesktopClaim) session.noteDesktopActivity();
           session.write(msg.d);
         } else if (
           msg.t === 'z' &&
@@ -135,10 +139,12 @@ export function registerWsRoutes(app: FastifyInstance, ctx: SessionPort, getHost
           const viewportType = msg.v === 'mobile' || msg.v === 'tablet' || msg.v === 'desktop' ? msg.v : undefined;
           if (viewportType === 'desktop') {
             session.claimDesktopSizing(sizingToken);
+            holdsDesktopClaim = true;
           } else if (viewportType) {
             // The connection's viewport can change (e.g. browser window
             // narrowed past the tablet breakpoint) — drop a stale claim.
             session.releaseDesktopSizing(sizingToken);
+            holdsDesktopClaim = false;
           }
           if (viewportType) {
             session.resize(msg.c, msg.r, { viewportType });