fix(tabs): grouped rail editing review fixes

- Pointer drag: a press released outside the rail no longer lingers. The
  release is heard on window while a press is pending, a move with the
  primary button up cancels it, a new press cancels any previous drag, and
  an existing Escape listener is removed before another is added, so no
  orphaned capture listener can swallow Escape before the terminal.
- Inline group rename: a commit by blur leaves focus where the user put it;
  Enter and Escape still return focus to the header.
- A failed layout read while edits are pending keeps the held layout and the
  editor and re-reads once the write settles, so a 409 is still rebased.
  Dropping unsaved work now always says so in a toast.
- "Move to <group>" quotes the group name (with a matching zh-CN pattern), so
  a group named "New group" or "ungrouped" no longer reads or translates like
  the fixed entries.
- The group menu glyph stays visible under (hover: none).
- The sessionStorage replay copy carries { owner, baseVersion, savedAt } and is
  ignored for another owner, after 60 s, or against an older layout. A move
  with no anchor carries no index, so a replay keeps the row last.
- A 400 that survives the re-read is reported as "Could not save tab groups."
- closeTabRailActionMenu() no longer removes the group menu's DOM.
- Cancelling "Delete group" returns focus to the header.
- Stale comments updated.

docs/architecture-invariants.md

@@ -303,9 +303,9 @@ So: `_confirmIdle()` (session.ts) requires the pane to go quiet, and then asks t
 - **Collapse is per-device** (`codeman:tab-groups-collapsed` in localStorage, ids of deleted groups garbage-collected on adoption). A store that throws means all-expanded; a malformed stored VALUE reads as empty and is rewritten, so it can never disable collapse on that device for good. A collapsed group still SHOWS the active row, and `_updateActiveTabImmediate` falls through to a full render whenever the structure key changes, since a class toggle cannot reveal a hidden row.
 - **A collapsed header carries the most urgent alert it hides** (`hiddenGroupAlerts()`, applied by `_syncTabGroupHeaderAlerts` on BOTH render paths, since alerts change without a rebuild), in the tab alert language: `tab-alert-action` red, `tab-alert-idle` yellow. A permission prompt behind a collapse must never be invisible.
 - **Lineage arcs to a collapse-hidden session anchor to its group header** (`lineage-line--proxied`); two endpoints proxied to one header draw nothing.
-- **The upstream HTML5 drag stays off in the grouped rail**: a flat-order drop cannot express a group move, and the server re-ranks within the old group. The grouped rail has its OWN pointer drag instead (`_bindTabLayoutPointerDrag`, mouse/pen only, bound once on the container): rows move before/after a row or into a group, a header drag reorders groups, and the drop maps to ONE operation through the pure `dropOperation()`. Escape cancels a drag, and the click that ends one is swallowed. The flat rail and the header strip keep the HTML5 drag untouched. For the same reason Ctrl+Shift+{ / } only swaps with a neighbour in the active session's own section (`_canSwapActiveTabWith`, reading the projection's `sectionByRef`): a cross-group swap moves nothing on the server, gets no `session:orderChanged` back, and would leave this client's `sessionOrder` and Alt+N targets out of step with every other device.
-- **Edits are named operations, saved serially.** `createEditCoordinator` applies `createGroup` / `renameGroup` / `deleteGroup` / `reorderGroup` / `moveRef` to the rail at once, then sends ONE `PUT /api/tab-layout {baseVersion, layout}` at a time; edits made meanwhile wait and go out on the version that write returns. A 409 carries the server's layout: the in-flight operations are replayed onto it (an operation that no longer applies is dropped and reported) and re-sent, at most `maxAttempts` times; a 400 re-reads first; anything else reports and re-reads. A `moveRef` moves the session together with the sessions that still follow it and marks a hand-moved child `placement: 'manual'`, mirroring the server's `moveRef`, and `normalizeLayout` keeps `placement` because whole layouts are written back. `_onTabLayoutChanged` / `_applyTabLayout` defer a read while a write is in flight and rebase unsaved edits onto a read otherwise. On `pagehide`, unconfirmed operations go out in a `keepalive` PUT AND into sessionStorage; after reload they replay onto the fresh layout, which is a no-op when the keepalive landed.
-- **Every way in has a keyboard path.** The session row menu (Shift+F10 in the tree, the rail's overflow button) gains Move up/down, Move to <group>, Move to Ungrouped and Move to new group in the vertical rail (only "new group" before the first group exists; nothing on the strip). A group header opens its menu with Shift+F10 / ContextMenu, right-click or its hover glyph (a non-focusable, `aria-hidden` span: a treeitem holds no interactive children), and F2 renames it inline. The menu closes on Escape (which it consumes before the global Escape handler), a pointer outside, Tab, focus leaving it, a resize, a second open and any full re-render. The inline group editor shares `_activeRename` with the session rename, so only the CURRENT editor may release `_inlineRenameActive`.
+- **The upstream HTML5 drag stays off in the grouped rail**: a flat-order drop cannot express a group move, and the server re-ranks within the old group. The grouped rail has its OWN pointer drag instead (`_bindTabLayoutPointerDrag`, mouse/pen only, bound once on the container): rows move before/after a row or into a group, a header drag reorders groups, and the drop maps to ONE operation through the pure `dropOperation()`. Escape cancels a drag, and the click that ends one is swallowed. ⚠️ A press is only captured once it moves 6 px, so its release can land outside the rail: `pointerup`/`pointercancel` are heard on `window` while a press is pending, a move with the primary button up cancels it, and a new press cancels any previous one. Without that a stale press became a phantom drag on the next hover, and a replaced drag left its capture-phase Escape listener behind, swallowing every Escape before the terminal saw it. The flat rail and the header strip keep the HTML5 drag untouched. For the same reason Ctrl+Shift+{ / } only swaps with a neighbour in the active session's own section (`_canSwapActiveTabWith`, reading the projection's `sectionByRef`): a cross-group swap moves nothing on the server, gets no `session:orderChanged` back, and would leave this client's `sessionOrder` and Alt+N targets out of step with every other device.
+- **Edits are named operations, saved serially.** `createEditCoordinator` applies `createGroup` / `renameGroup` / `deleteGroup` / `reorderGroup` / `moveRef` to the rail at once, then sends ONE `PUT /api/tab-layout {baseVersion, layout}` at a time; edits made meanwhile wait and go out on the version that write returns. A 409 carries the server's layout: the in-flight operations are replayed onto it (an operation that no longer applies is dropped and reported) and re-sent, at most `maxAttempts` times; a 400 re-reads once (a second 400 is reported as a failed save, not as a race); anything else reports and re-reads. A `moveRef` moves the session together with the sessions that still follow it and marks a hand-moved child `placement: 'manual'`, mirroring the server's `moveRef`, and `normalizeLayout` keeps `placement` because whole layouts are written back. `_onTabLayoutChanged` / `_applyTabLayout` defer a read while a write is in flight and rebase unsaved edits onto a read otherwise. ⚠️ A FAILED read (`_applyTabLayout(null)`) while edits are pending keeps the held layout and the editor and re-reads after the write settles: disposing there would orphan the in-flight write, whose 409 then never gets its rebase. Any path that does drop unsaved work says so in a toast. On `pagehide`, unconfirmed operations go out in a `keepalive` PUT AND into sessionStorage as `{ owner, baseVersion, savedAt, operations }`; after reload they replay onto the fresh layout (a no-op when the keepalive landed), but only for the same owner, within `TAB_LAYOUT_PENDING_MAX_AGE_MS` (60 s), and never onto a layout older than the copy's base. A "Move to <group>" with no anchor carries no `index`, so a replay still puts the row last.
+- **Every way in has a keyboard path.** The session row menu (Shift+F10 in the tree, the rail's overflow button) gains Move up/down, Move to <group>, Move to Ungrouped and Move to new group in the vertical rail (only "new group" before the first group exists; nothing on the strip). A group header opens its menu with Shift+F10 / ContextMenu, right-click or its hover glyph (a non-focusable, `aria-hidden` span: a treeitem holds no interactive children), and F2 renames it inline (Enter commits and refocuses the header; a commit by BLUR leaves focus where it went, since refocusing from inside the blur handler overrides the user's click). The glyph stays visible under `@media (hover: none)`: a touch tablet has no hover and no long-press `contextmenu`. Group names in "Move to" labels are quoted, so a group named "New group" or "ungrouped" cannot read (or translate, case-insensitively) like the fixed entries. The menu closes on Escape (which it consumes before the global Escape handler), a pointer outside, Tab, focus leaving it, a resize, a second open and any full re-render. It borrows the `.tab-rail-action-menu` class for its look only: `closeTabRailActionMenu()` excludes `.tab-layout-group-action-menu`, so closing the row menu (every `session:deleted` does) cannot strand the group menu's listeners. The inline group editor shares `_activeRename` with the session rename, so only the CURRENT editor may release `_inlineRenameActive`.
 - **Only the grouped rail is a tree.** `#sessionTabs` ships as `role=tablist` with `role=tab` rows, and the header strip, sidebar and flat rail keep exactly that. While grouped, `_applyTabListRole` makes it `role=tree` (and restores `tablist` + its label when grouping ends), named-group headers are level-1 `treeitem`s that `aria-owns` their rows' `role=group` (rows sit beside the header, not inside it), and ungrouped rows plus a collapsed group's kept selection are level-1 items. A collapsed header owns nothing, a group with no open rows is a leaf (no `aria-expanded`, no owned group), and the "Ungrouped" heading is `aria-hidden`. Rows are re-roled in the DOM by `_applyTabTreeSemantics` after render, never by rewriting their markup, so a grouped row's content stays the flat row's.
 - **One tab stop in the tree.** Exactly one treeitem carries `tabindex=0` (the focused or selected item); every control inside a row drops to `-1`, which is why Shift+F10 / ContextMenu open a row's actions from the keyboard. Focus survives a full re-render by identity (`group:`/`session:`/`webview:`; a row a collapse just hid hands focus to its header), but only when focus was already inside the rail. The tree walk (`_tabTreeItems`) follows painted order WITHIN each group when the rail is sorted; the flat list keeps its own whole-list computed-order walk. `aria-posinset`/`aria-setsize` follow painted order too, so the incremental render path re-runs `_applyTabTreePositions` after it re-sorts rows in place. ⚠️ `_handleTabTreeKeydown` acts only when the key lands on the treeitem ITSELF: a key on a focused in-row control (close, overflow, the rename input) is that control's, or Enter on the overflow button re-selects the row instead of reopening its menu. ⚠️ The roving `tabindex=-1` also hides every item but the stop from the keyboard-dismiss selector's `[tabindex]` arm, which is why `MOBILE_KEYBOARD_DISMISS_EXEMPT_SELECTOR` lists `[role="treeitem"]` (see Dismissing the on-screen keyboard).
 

src/web/public/app.js

@@ -577,6 +577,13 @@ const SIDEBAR_RICH_CLOCK_MS = 20000;
  */
 const URL_SESSION_WAIT_MS = 30000;
 
+/**
+ * How old the sessionStorage copy of unsaved tab-group edits may be when the
+ * next page replays it (see _restorePendingTabLayoutEdits). A reload takes
+ * seconds; an older copy is from a tab that sat closed or a different visit.
+ */
+const TAB_LAYOUT_PENDING_MAX_AGE_MS = 60000;
+
 class CodemanApp {
   constructor() {
     this.sessions = new Map();
@@ -6335,7 +6342,7 @@ class CodemanApp {
   }
 
   // ═══════════════════════════════════════════════════════════════
-  // Owner tab layout: grouped vertical rail (read-only)
+  // Owner tab layout: grouped vertical rail (reading and drawing)
   // ═══════════════════════════════════════════════════════════════
   //
   // The server owns named tab groups (GET /api/tab-layout, tab-layout*.ts) and
@@ -6343,7 +6350,7 @@ class CodemanApp {
   // Ctrl+Tab and every other order consumer are untouched here. This layer only
   // decides how the VERTICAL rail draws rows: in sections, with per-device
   // collapse. With no groups (or any read failure) the rail is the flat list it
-  // has always been.
+  // has always been. Editing the groups is the next block.
 
   _ensureTabLayoutCoordinator() {
     if (this._tabLayoutCoordinator) return this._tabLayoutCoordinator;
@@ -6403,6 +6410,13 @@ class CodemanApp {
     if (next && this.tabLayout && next.version < this.tabLayout.version) return;
     const editor = this._tabLayoutEditor;
     if (editor) {
+      // A failed read says nothing about the layout, and dropping the editor now
+      // would lose the edit outright: a write in flight would never get its 409
+      // rebased. Keep the held layout and the editor; read again once it settles.
+      if (!next && editor.hasPending()) {
+        this._tabLayoutReloadPending = true;
+        return;
+      }
       if (next && editor.isWriting()) {
         // The write's own response decides; read again after it.
         this._tabLayoutReloadPending = true;
@@ -6411,6 +6425,7 @@ class CodemanApp {
       // Unsaved edits are rebased onto the read (adoptExternal repaints); with
       // none, the editor is simply rebuilt from the new layout on next use.
       if (next && editor.hasPending() && editor.adoptExternal(next)) return;
+      if (editor.hasPending()) this.showToast?.('Your tab group edit was not saved.', 'error');
       editor.dispose();
       this._tabLayoutEditor = null;
     }
@@ -6608,7 +6623,11 @@ class CodemanApp {
     const groups = this.tabLayout?.groups || [];
     const index = groups.findIndex((group) => group.id === groupId);
     if (index < 0) return false;
-    if (!window.confirm(`Delete group "${groups[index].name}"? Its tabs move to Ungrouped.`)) return false;
+    if (!window.confirm(`Delete group "${groups[index].name}"? Its tabs move to Ungrouped.`)) {
+      // The menu that asked is gone; put the keyboard back on the group.
+      this.$('sessionTabs')?.querySelector(`[data-tab-group-header="${CSS.escape(groupId)}"]`)?.focus();
+      return false;
+    }
     const neighbour = groups[index + 1] || groups[index - 1];
     return this.editTabLayout({ type: 'deleteGroup', groupId }, neighbour ? `group:${neighbour.id}` : null);
   }
@@ -6667,7 +6686,10 @@ class CodemanApp {
     }
     for (const group of this.tabLayout.groups) {
       if (group.id === location.groupId) continue;
-      actions.push({ label: `Move to ${group.name}`, run: () => this.moveTabRef(ref, group.id) });
+      // Quoted: a group may be NAMED "New group" or "ungrouped", which unquoted
+      // would read (and, case-insensitively, translate) exactly like the
+      // fixed "Move to new group" / "Move to Ungrouped" entries next to it.
+      actions.push({ label: `Move to "${group.name}"`, run: () => this.moveTabRef(ref, group.id) });
     }
     if (location.groupId !== null) actions.push({ label: 'Move to Ungrouped', run: () => this.moveTabRef(ref, null) });
     actions.push({ label: 'Move to new group', run: () => this.createTabGroup({ ref }) });
@@ -6842,7 +6864,10 @@ class CodemanApp {
 
     let settled = false;
     const handle = { groupId, cancel: () => settle(false) };
-    const settle = (commit) => {
+    // `fromBlur`: focus already moved somewhere the user chose (the terminal,
+    // another control). Pulling it back to the header from inside the blur
+    // handler wins over that move, so a blur commit never asks for refocus.
+    const settle = (commit, { fromBlur = false } = {}) => {
       if (settled) return;
       settled = true;
       const name = input.value.trim();
@@ -6851,11 +6876,14 @@ class CodemanApp {
       this._activeRename = null;
       this._inlineRenameActive = false;
       const current = this.tabLayout?.groups?.find((candidate) => candidate.id === groupId);
+      const focusIdentity = fromBlur ? null : `group:${groupId}`;
       if (commit && current && name && name !== current.name) {
-        if (this.editTabLayout({ type: 'renameGroup', groupId, name }, `group:${groupId}`)) return;
+        if (this.editTabLayout({ type: 'renameGroup', groupId, name }, focusIdentity)) return;
+      }
+      if (focusIdentity) {
+        this._tabFocusIdentity = focusIdentity;
+        this._tabRefocusAfterEdit = true;
       }
-      this._tabFocusIdentity = `group:${groupId}`;
-      this._tabRefocusAfterEdit = true;
       this._fullRenderSessionTabs();
     };
     this._activeRename = handle;
@@ -6870,7 +6898,7 @@ class CodemanApp {
         settle(false);
       }
     });
-    input.addEventListener('blur', () => settle(true));
+    input.addEventListener('blur', () => settle(true, { fromBlur: true }));
     input.focus();
     input.select();
     return true;
@@ -6896,6 +6924,11 @@ class CodemanApp {
   }
 
   _onTabLayoutPointerDown(e, container) {
+    // A press whose release never reached us (let go outside the rail, or
+    // outside the window) must not survive into this one: a stale pending
+    // press turned into a phantom drag on the next hover, and a replaced drag
+    // left its Escape listener behind for good.
+    if (this._tabLayoutDrag) this._cancelTabLayoutPointerDrag(container);
     if (e.button !== 0 || e.pointerType === 'touch' || !container.classList.contains('session-tabs--grouped')) return;
     if (this._inlineRenameActive || !this._tabLayoutEditable()) return;
     // Controls keep their own click; only the row body or the header drags.
@@ -6907,7 +6940,14 @@ class CodemanApp {
     else if (row?.dataset.webviewId) source = { type: 'ref', ref: { kind: 'webview', id: row.dataset.webviewId } };
     else if (row?.dataset.id) source = { type: 'ref', ref: { kind: 'session', id: row.dataset.id } };
     if (!source) return;
-    this._tabLayoutDrag = { pointerId: e.pointerId, x: e.clientX, y: e.clientY, source, origin: header || row, active: false, target: null };
+    const drag = { pointerId: e.pointerId, x: e.clientX, y: e.clientY, source, origin: header || row, active: false, target: null };
+    // Capture is only taken once the press becomes a drag, so until then the
+    // release can land outside the rail: hear it on window.
+    drag.windowUp = (upEvent) => this._finishTabLayoutPointerDrag(upEvent, container);
+    drag.windowCancel = () => this._cancelTabLayoutPointerDrag(container);
+    window.addEventListener('pointerup', drag.windowUp, true);
+    window.addEventListener('pointercancel', drag.windowCancel, true);
+    this._tabLayoutDrag = drag;
   }
 
   /** What a pointer at (x, y) would drop onto, from the rendered rail. */
@@ -6938,6 +6978,11 @@ class CodemanApp {
   _onTabLayoutPointerMove(e, container) {
     const drag = this._tabLayoutDrag;
     if (!drag || drag.pointerId !== e.pointerId) return;
+    // The primary button is up, so the release went somewhere we never heard.
+    if ((e.buttons & 1) === 0) {
+      this._cancelTabLayoutPointerDrag(container);
+      return;
+    }
     if (!drag.active) {
       if (Math.hypot(e.clientX - drag.x, e.clientY - drag.y) < 6) return;
       drag.active = true;
@@ -6948,6 +6993,7 @@ class CodemanApp {
       try {
         container.setPointerCapture(e.pointerId);
       } catch {}
+      if (this._tabLayoutDragKeydown) document.removeEventListener('keydown', this._tabLayoutDragKeydown, true);
       this._tabLayoutDragKeydown = (keyEvent) => {
         if (keyEvent.key !== 'Escape') return;
         keyEvent.preventDefault();
@@ -6969,6 +7015,8 @@ class CodemanApp {
     const drag = this._tabLayoutDrag;
     if (!drag) return;
     this._tabLayoutDrag = null;
+    if (drag.windowUp) window.removeEventListener('pointerup', drag.windowUp, true);
+    if (drag.windowCancel) window.removeEventListener('pointercancel', drag.windowCancel, true);
     drag.origin?.classList.remove('tab-layout-dragging');
     container?.classList.remove('tab-layout-drag-active');
     if (container) this._clearTabLayoutDropMarks(container);
@@ -7010,7 +7058,10 @@ class CodemanApp {
     const operations = editor?.pendingOperations?.() || [];
     if (!operations.length) return false;
     try {
-      sessionStorage.setItem('codeman:tab-layout-pending', JSON.stringify({ operations }));
+      sessionStorage.setItem(
+        'codeman:tab-layout-pending',
+        JSON.stringify({ owner: this._tabLayoutOwnerKey(), baseVersion: editor.baseVersion(), savedAt: Date.now(), operations })
+      );
     } catch {}
     try {
       const layout = editor.getLayout();
@@ -7024,17 +7075,53 @@ class CodemanApp {
     return true;
   }
 
+  /** Whose layout this page edits, as the server keys it (`@single` without multi-user). */
+  _tabLayoutOwnerKey() {
+    const me = window.__codemanUser;
+    if (!me) return null;
+    return me.multiUser ? me.username : '@single';
+  }
+
+  /**
+   * Replay the previous page's unsaved edits, but only that page's: the copy is
+   * ignored when it belongs to another owner (a different login in this tab),
+   * is older than a reload could explain, or names a layout newer than the one
+   * just read (a different server behind the same origin).
+   */
   _restorePendingTabLayoutEdits() {
-    let operations;
+    let saved;
     try {
       const raw = sessionStorage.getItem('codeman:tab-layout-pending');
       if (!raw) return false;
-      sessionStorage.removeItem('codeman:tab-layout-pending');
-      operations = JSON.parse(raw)?.operations;
+      saved = JSON.parse(raw);
     } catch {
       return false;
     }
+    const owner = this._tabLayoutOwnerKey();
+    if (owner === null) {
+      // Who we are is not known yet (/api/me still loading): decide once it is.
+      if (!this._tabLayoutRestoreWaiting) {
+        this._tabLayoutRestoreWaiting = true;
+        document.addEventListener(
+          'codeman:me',
+          () => {
+            this._tabLayoutRestoreWaiting = false;
+            this._restorePendingTabLayoutEdits();
+          },
+          { once: true }
+        );
+      }
+      return false;
+    }
+    try {
+      sessionStorage.removeItem('codeman:tab-layout-pending');
+    } catch {}
+    const operations = saved?.operations;
     if (!Array.isArray(operations) || !operations.length || !this.tabLayout || !window.CodemanTabLayout) return false;
+    if (saved.owner !== owner) return false;
+    const age = Date.now() - saved.savedAt;
+    if (!Number.isFinite(age) || age < 0 || age > TAB_LAYOUT_PENDING_MAX_AGE_MS) return false;
+    if (!Number.isSafeInteger(saved.baseVersion) || saved.baseVersion > this.tabLayout.version) return false;
     return this._ensureTabLayoutEditor().restore(operations);
   }
 
@@ -7049,9 +7136,9 @@ class CodemanApp {
     // affordance instead of lying about it — `tabRailSort: 'manual'` is the way
     // back to drag-reordering, and Alt+N / Ctrl+Shift+{ } still walk the strip
     // order this list is no longer showing.
-    // The grouped rail is read-only for now: a flat-order drag cannot express
-    // "move into that group", and the server would re-rank it within its old
-    // group anyway. Grouped editing comes with its own drag model.
+    // The grouped rail opts out too: a flat-order drag cannot express "move
+    // into that group", and the server would re-rank it within its old group
+    // anyway. It has its own pointer drag (_bindTabLayoutPointerDrag).
     if (this.isTabRailSorted() || container.classList.contains('session-tabs--grouped')) {
       tabs.forEach((tab) => tab.setAttribute('draggable', 'false'));
       return;

src/web/public/i18n.js

@@ -85,6 +85,7 @@
     'Tab groups changed elsewhere; part of your edit no longer applies.':
       '标签分组已在别处更改；你的部分编辑已不再适用。',
     'Tab groups kept changing elsewhere; your edit was not saved.': '标签分组在别处持续更改；你的编辑未保存。',
+    'Your tab group edit was not saved.': '你的标签分组编辑未保存。',
     'Open session manager': '打开会话管理器',
     Attachments: '附件',
     'Open attachment history': '打开附件历史',
@@ -952,7 +953,7 @@
       [/^Selected: (.+)$/, (_m, value) => `已选择：${value}`],
       [/^Failed to (.+)$/, (_m, action) => `操作失败：${action}`],
       // Group names are user text: they pass through untranslated.
-      [/^Move to (.+)$/, (_m, group) => `移到 ${group}`],
+      [/^Move to "(.+)"$/, (_m, group) => `移到“${group}”`],
       [
         /^Delete group "(.+)"\? Its tabs move to Ungrouped\.$/,
         (_m, group) => `删除分组“${group}”？其中的标签将移到未分组。`,

src/web/public/styles.css

@@ -752,6 +752,14 @@ html[data-tab-orientation='vertical'] .tab-rail .tab-layout-group-header:focus-v
   opacity: 1;
 }
 
+/* No hover on a touch tablet, and a long press there is not a contextmenu
+   event: the glyph is the only way into the group menu, so keep it shown. */
+@media (hover: none) {
+  html[data-tab-orientation='vertical'] .tab-rail .tab-layout-group-menu {
+    opacity: 1;
+  }
+}
+
 html[data-tab-orientation='vertical'] .tab-rail .tab-layout-group-menu:hover {
   color: var(--text);
   background: var(--bg-tertiary, var(--bg-hover));

src/web/public/tab-layout-browser.js

@@ -427,9 +427,11 @@
     const layout = normalizeLayout(layoutInput);
     const block = lineageBlock(layout, ref, parents);
     const remaining = containerRefs(layout, groupId).filter((candidate) => !block.has(refKey(candidate)));
-    if (!anchor) return { groupId, index: remaining.length };
+    // No anchor means "at the end", and an operation with no index keeps
+    // meaning that when it is replayed onto a layout that has changed since.
+    if (!anchor) return { groupId };
     const at = remaining.findIndex((candidate) => refKey(candidate) === refKey(anchor));
-    if (at < 0) return { groupId, index: remaining.length };
+    if (at < 0) return { groupId };
     return { groupId, index: placement === 'after' ? at + 1 : at };
   }
 
@@ -482,7 +484,7 @@
       type: 'moveRef',
       ref: { kind: source.ref.kind, id: source.ref.id },
       groupId: destination.groupId,
-      index: destination.index,
+      ...(destination.index === undefined ? {} : { index: destination.index }),
       parents: parents || {},
     };
     return contentKey(applyOperation(layout, operation)) === contentKey(layout) ? null : operation;
@@ -613,6 +615,7 @@
       pending = [];
       let failed = false;
       let reportedDrop = false;
+      let rereadFor400 = false;
       try {
         for (let attempt = 0; attempt < maxAttempts && inFlight.length; attempt++) {
           const desired = replayOperations(authoritative, inFlight);
@@ -633,7 +636,10 @@
             inFlight = [];
           } else if (response?.status === 409 && response.layout) {
             authoritative = normalizeLayout(response.layout);
-          } else if (response?.status === 400 && options.fetchLayout) {
+          } else if (response?.status === 400 && options.fetchLayout && !rereadFor400) {
+            // Maybe our base was stale in a way the server reports as invalid:
+            // re-read once. A 400 that survives that is a refusal, not a race.
+            rereadFor400 = true;
             authoritative = normalizeLayout(await options.fetchLayout());
             if (disposed) return;
           } else {

src/web/public/tab-rail-resize.js

@@ -298,7 +298,9 @@ Object.assign(CodemanApp.prototype, {
   },
 
   closeTabRailActionMenu(options = {}) {
-    const menu = document.querySelector('.tab-rail-action-menu');
+    // The group menu borrows this class for its look but has its own owner
+    // (closeTabGroupMenu); removing its DOM here would strand its listeners.
+    const menu = document.querySelector('.tab-rail-action-menu:not(.tab-layout-group-action-menu)');
     const trigger = this._tabRailActionMenuTrigger;
     menu?.remove();
     if (this._tabRailActionMenuOutside) {

test/i18n-branding.test.ts

@@ -91,6 +91,18 @@ describe('custom display name and browser localization', () => {
     dom.window.close();
   });
 
+  it('keeps a quoted group name apart from the fixed "Move to" entries in zh-CN', () => {
+    const dom = makeDom('');
+    const api = dom.window.CodemanI18n;
+    api.configure({ language: 'zh-CN' });
+    const labels = ['Move to "New group"', 'Move to new group', 'Move to "ungrouped"', 'Move to Ungrouped'].map((label) =>
+      api.t(label)
+    );
+    expect(labels).toEqual(['移到“New group”', '移到新分组', '移到“ungrouped”', '移到未分组']);
+    expect(new Set(labels).size).toBe(4);
+    dom.window.close();
+  });
+
   it('renders hostile-looking names as text rather than HTML', () => {
     const dom = makeDom('<span class="logo">Codeman</span>');
     const api = dom.window.CodemanI18n;

test/tab-layout-editing.browser.test.ts

@@ -65,6 +65,7 @@ describe('grouped rail editing in Chromium', () => {
           <main class="main" style="width:100%;height:760px">
             <aside class="tab-rail" id="tabRail" aria-label="Session navigation" style="width:280px"></aside>
             <button id="elsewhere">elsewhere</button>
+            <textarea id="term" aria-label="stand-in for the terminal" style="position:absolute;left:700px;top:300px"></textarea>
           </main>
         </body>
       </html>`);
@@ -124,6 +125,11 @@ describe('grouped rail editing in Chromium', () => {
       };
       w.__setApp(app);
       w.__app = app;
+      // Escapes that reach the stand-in terminal (xterm listens on its textarea).
+      w.__termEscapes = 0;
+      document.getElementById('term')!.addEventListener('keydown', (e) => {
+        if (e.key === 'Escape') w.__termEscapes++;
+      });
     });
   });
 
@@ -151,6 +157,7 @@ describe('grouped rail editing in Chromium', () => {
       w.__app._applyTabLayout(layout);
       w.__activation = null;
       w.__panelsClosed = false;
+      w.__termEscapes = 0;
     }, LAYOUT);
     await page.mouse.move(1, 1);
   });
@@ -218,6 +225,104 @@ describe('grouped rail editing in Chromium', () => {
     expect(await page.evaluate(() => (window as any).__activation)).toBe('session:two');
   });
 
+  it('a press released outside the rail leaves nothing behind, and Escape still reaches the terminal', async () => {
+    const a = await box('.session-tab[data-id="one"]');
+    // Press on a row and flick out of the rail in ONE move, releasing out there:
+    // the rail never sees the move or the release.
+    await page.mouse.move(a.x + 20, a.y + a.height / 2);
+    await page.mouse.down();
+    await page.mouse.move(760, 600);
+    await page.mouse.up();
+    // The release was heard on window: the press is gone before any hover.
+    expect(await page.evaluate(() => (window as any).__app._tabLayoutDrag)).toBeNull();
+    // Hovering back with no button down must not turn into a phantom drag.
+    const b = await box('[data-tab-group-header="gy"]');
+    await page.mouse.move(b.x + 30, b.y + b.height / 2, { steps: 6 });
+    expect(await page.locator('.tab-layout-dragging, .tab-layout-drop-into, .tab-layout-drag-active').count()).toBe(0);
+    expect(await page.evaluate(() => (window as any).__app._tabLayoutDrag)).toBeNull();
+
+    // A real drag after that, cancelled with Escape, then one more completed.
+    await page.mouse.move(a.x + 20, a.y + a.height / 2);
+    await page.mouse.down();
+    await page.mouse.move(b.x + 30, b.y + b.height / 2, { steps: 6 });
+    await page.keyboard.press('Escape');
+    await page.mouse.up();
+    await drag('.session-tab[data-id="one"]', '[data-tab-group-header="gy"]');
+    await settled();
+    expect(puts).toHaveLength(1);
+
+    // No drag listener is left in document capture swallowing Escape.
+    await page.locator('#term').focus();
+    await page.keyboard.press('Escape');
+    await page.keyboard.press('Escape');
+    expect(await page.evaluate(() => (window as any).__termEscapes)).toBe(2);
+    expect(await page.evaluate(() => (window as any).__app._tabLayoutDragKeydown)).toBeNull();
+  });
+
+  it('each guard holds on its own: buttons-up move, a second press, no stacked Escape listener', async () => {
+    // Synthetic pointer events reach the cases a real mouse cannot isolate (a
+    // release outside the WINDOW never reaches any listener of ours).
+    const result = await page.evaluate(() => {
+      const w = window as any;
+      const rail = document.getElementById('sessionTabs')!;
+      const at = (el: Element) => {
+        const r = el.getBoundingClientRect();
+        return { clientX: r.left + 20, clientY: r.top + r.height / 2 };
+      };
+      const fire = (target: Element, type: string, init: PointerEventInit) =>
+        target.dispatchEvent(
+          new PointerEvent(type, { bubbles: true, cancelable: true, pointerId: 7, pointerType: 'mouse', ...init })
+        );
+      const one = rail.querySelector('.session-tab[data-id="one"] .tab-name')!;
+      const three = rail.querySelector('.session-tab[data-id="three"] .tab-name')!;
+      const out: Record<string, unknown> = {};
+
+      // 1. A pending press, then a move with no button down: cancelled, no drag.
+      fire(one, 'pointerdown', { button: 0, buttons: 1, ...at(one) });
+      fire(three, 'pointermove', { buttons: 0, ...at(three) });
+      out.afterButtonsUp = w.__app._tabLayoutDrag;
+      out.dragClass = rail.querySelectorAll('.tab-layout-dragging').length;
+
+      // 2. An active drag whose release never arrived, then a new press.
+      fire(one, 'pointerdown', { button: 0, buttons: 1, ...at(one) });
+      fire(three, 'pointermove', { buttons: 1, ...at(three) });
+      out.firstActive = w.__app._tabLayoutDrag?.active === true;
+      const firstListener = w.__app._tabLayoutDragKeydown;
+      fire(three, 'pointerdown', { button: 0, buttons: 1, ...at(three) });
+      out.staleOrigin = rail.querySelectorAll('.tab-layout-dragging').length;
+      out.firstListenerKept = w.__app._tabLayoutDragKeydown === firstListener;
+      fire(one, 'pointermove', { buttons: 1, ...at(one) });
+      fire(one, 'pointerup', { button: 0, buttons: 0, ...at(one) });
+      out.leftover = w.__app._tabLayoutDragKeydown;
+      return out;
+    });
+    expect(result.afterButtonsUp).toBeNull();
+    expect(result.dragClass).toBe(0);
+    expect(result.firstActive).toBe(true);
+    expect(result.staleOrigin).toBe(0);
+    expect(result.firstListenerKept).toBe(false);
+    expect(result.leftover).toBeNull();
+    await page.locator('#term').focus();
+    await page.keyboard.press('Escape');
+    expect(await page.evaluate(() => (window as any).__termEscapes)).toBe(1);
+    await settled();
+  });
+
+  it('committing a group rename by clicking elsewhere leaves focus where the click put it', async () => {
+    await page.evaluate(() => (window as any).__app.startTabGroupRename('gy'));
+    const input = page.locator('.tab-layout-group-rename-input');
+    await expect.poll(() => input.evaluate((el) => el === document.activeElement)).toBe(true);
+    await page.keyboard.press('Control+A');
+    await page.keyboard.type('Elsewhere');
+    await page.locator('#term').click();
+    await settled();
+    expect(puts.at(-1).layout.groups[1].name).toBe('Elsewhere');
+    expect(await page.evaluate(() => document.activeElement?.id)).toBe('term');
+    // So Enter goes to the terminal, not to the header (which would collapse it).
+    await page.keyboard.press('Enter');
+    expect(await page.evaluate(() => (window as any).__app.collapsedTabGroupIds.size)).toBe(0);
+  });
+
   it('paints the inline group editor as you type, then saves the trimmed name', async () => {
     await page.evaluate(() => (window as any).__app.startTabGroupRename('gx'));
     const input = page.locator('.tab-layout-group-rename-input');

test/tab-layout-editing.test.ts

@@ -136,17 +136,17 @@ describe('drop -> operation', () => {
       groupId: 'g1',
       index: 1,
     });
-    expect(h.dropOperation(base(), { type: 'ref', ref: w('web') }, { type: 'group', groupId: 'g1' }, {})).toMatchObject(
-      {
-        ref: w('web'),
-        groupId: 'g1',
-        index: 2,
-      }
-    );
-    expect(h.dropOperation(base(), { type: 'ref', ref: s('a') }, { type: 'ungrouped' }, {})).toMatchObject({
-      groupId: null,
-      index: 2,
-    });
+    // Onto a header or Ungrouped means "at the end": no index, so a replay onto
+    // a layout that gained rows meanwhile still lands it last.
+    const onHeader = h.dropOperation(base(), { type: 'ref', ref: w('web') }, { type: 'group', groupId: 'g1' }, {});
+    expect(onHeader).toMatchObject({ ref: w('web'), groupId: 'g1' });
+    expect(onHeader).not.toHaveProperty('index');
+    const onUngrouped = h.dropOperation(base(), { type: 'ref', ref: s('a') }, { type: 'ungrouped' }, {});
+    expect(onUngrouped).toMatchObject({ groupId: null });
+    expect(onUngrouped).not.toHaveProperty('index');
+    const crowded = { ...base(), groups: [{ ...base().groups[0], refs: [...base().groups[0].refs, s('late')] }, base().groups[1]] };
+    const replayed = h.applyOperation(crowded, onHeader);
+    expect(replayed.groups[0].refs.at(-1)).toEqual(w('web'));
   });
 
   it('maps a group dropped on another group (or a row in it) to a reorder', () => {
@@ -364,6 +364,26 @@ describe('edit coordinator', () => {
     expect(onFailure).toHaveBeenCalledTimes(1);
   });
 
+  it('reports a 400 that survives the re-read as a failed save, not as a race', async () => {
+    const { put, calls } = controlledPut();
+    const fetchLayout = vi.fn(async () => base(11));
+    const reportError = vi.fn();
+    const onFailure = vi.fn();
+    const { editor } = makeEditor(put, { fetchLayout, onFailure, reportError, maxAttempts: 3 });
+    editor.enqueue({ type: 'renameGroup', groupId: 'g1', name: 'Mine' });
+    await settle();
+    calls[0].resolve({ ok: false, status: 400, layout: null });
+    await settle();
+    await settle();
+    calls[1].resolve({ ok: false, status: 400, layout: null });
+    await settle();
+    expect(calls).toHaveLength(2);
+    expect(fetchLayout).toHaveBeenCalledTimes(1);
+    expect(reportError).toHaveBeenCalledWith('Could not save tab groups.');
+    expect(reportError).not.toHaveBeenCalledWith('Tab groups kept changing elsewhere; your edit was not saved.');
+    expect(onFailure).toHaveBeenCalledTimes(1);
+  });
+
   it('refuses an external layout while writing, rebases pending edits onto one otherwise', async () => {
     const { put, calls } = controlledPut();
     const { editor, applied } = makeEditor(put);
@@ -523,6 +543,7 @@ beforeEach(() => {
   win.localStorage.clear();
   win.sessionStorage.clear();
   document.body.innerHTML = '';
+  win.__codemanUser = { username: 'admin', role: 'admin', multiUser: false };
 });
 
 afterEach(() => {
@@ -542,7 +563,7 @@ describe('row actions in the vertical rail', () => {
     expect(menuLabels()).toEqual([
       'Session options',
       'Move down',
-      'Move to Later',
+      'Move to "Later"',
       'Move to Ungrouped',
       'Move to new group',
       'Close session',
@@ -555,11 +576,34 @@ describe('row actions in the vertical rail', () => {
     expect(menuLabels()).toEqual(['Session options', 'Close session']);
   });
 
+  it('quotes group names, so a group called "New group" or "ungrouped" reads apart from the fixed entries', () => {
+    installFetch();
+    const app = makeApp({
+      ...serverLayout(),
+      groups: [
+        { id: 'gn', name: 'New group', refs: [s('s2')] },
+        { id: 'gu', name: 'ungrouped', refs: [] },
+      ],
+    });
+    app.openTabRailActionMenu({ preventDefault() {}, stopPropagation() {}, currentTarget: row('s2') }, 's2');
+    expect(menuLabels()).toEqual([
+      'Session options',
+      'Move to "ungrouped"',
+      'Move to Ungrouped',
+      'Move to new group',
+      'Close session',
+    ]);
+    app.closeTabRailActionMenu();
+    app.openTabRailActionMenu({ preventDefault() {}, stopPropagation() {}, currentTarget: row('s1') }, 's1');
+    expect(menuLabels()).toContain('Move to "New group"');
+    expect(menuLabels()).toContain('Move to new group');
+  });
+
   it('moves a row into another group with one PUT carrying the held version', async () => {
     const puts = installFetch();
     const app = makeApp();
     app.openTabRailActionMenu({ preventDefault() {}, stopPropagation() {}, currentTarget: row('s1') }, 's1');
-    clickMenu('Move to Later');
+    clickMenu('Move to "Later"');
     // Optimistic: the rail already shows it there.
     expect(row('s1').closest('.tab-layout-group')!.getAttribute('data-tab-group-id')).toBe('gy');
     await flush();
@@ -621,7 +665,7 @@ describe('web tab rows', () => {
     expect(menuLabels()).toEqual([
       'Web tab settings',
       'Move up',
-      'Move to Later',
+      'Move to "Later"',
       'Move to Ungrouped',
       'Move to new group',
     ]);
@@ -671,6 +715,35 @@ describe('group menu', () => {
     expect(keys(last.ungrouped)).toEqual(['session:s1', 'session:s3', 'session:s2', 'webview:w1']);
   });
 
+  it('cancelling "Delete group" returns focus to the header, with no write', async () => {
+    const puts = installFetch();
+    const app = makeApp();
+    win.confirm = vi.fn(() => false);
+    header('gy').focus();
+    key(header('gy'), 'F10', { shiftKey: true });
+    clickMenu('Delete group');
+    expect(win.confirm).toHaveBeenCalledTimes(1);
+    await flush();
+    expect(puts).toHaveLength(0);
+    expect(document.activeElement).toBe(header('gy'));
+    expect(app.tabLayout.groups).toHaveLength(2);
+  });
+
+  it("closing the row menu (as session:deleted does) leaves an open group menu and its listeners alone", () => {
+    installFetch();
+    const app = makeApp();
+    header('gx').focus();
+    key(header('gx'), 'F10', { shiftKey: true });
+    const menu = document.querySelector('.tab-layout-group-action-menu');
+    expect(menu).not.toBeNull();
+    app.closeTabRailActionMenu();
+    expect(menu!.isConnected).toBe(true);
+    expect(app._tabGroupMenu).toBe(menu);
+    app.closeTabGroupMenu();
+    expect(menu!.isConnected).toBe(false);
+    expect(app._tabGroupMenuKeydown).toBeNull();
+  });
+
   it('renames from F2 and cancels on Escape without a write', async () => {
     const puts = installFetch();
     const app = makeApp();
@@ -809,6 +882,107 @@ describe('server echoes and reloads', () => {
     expect(gets).toHaveLength(1);
   });
 
+  it('a failed read during a write keeps the edit and its editor, and the 409 still rebases', async () => {
+    const pending: Array<{ body: any; resolve: (r: any) => void }> = [];
+    const gets: number[] = [];
+    win.fetch = vi.fn((_url: string, init: any) => {
+      if (init?.method === 'PUT') {
+        const body = JSON.parse(init.body);
+        return new Promise((resolve) => pending.push({ body, resolve }));
+      }
+      gets.push(1);
+      return Promise.resolve({
+        ok: true,
+        status: 200,
+        json: async () => ({ success: true, data: { layout: app.tabLayout } }),
+      });
+    });
+    const app = makeApp();
+    app.editTabLayout({ type: 'renameGroup', groupId: 'gy', name: 'Mine' });
+    await flush();
+    expect(pending).toHaveLength(1);
+    const editor = app._tabLayoutEditor;
+    // The layout read failed (the load coordinator's fallback) while the PUT is out.
+    app._applyTabLayout(null);
+    expect(app._tabLayoutEditor).toBe(editor);
+    expect(app.tabLayout.groups[1].name).toBe('Mine');
+    expect(tabs().getAttribute('role')).toBe('tree');
+    // Someone else wrote first: the 409 is rebased and retried, not lost.
+    const theirs = { ...serverLayout(9), groups: [...serverLayout().groups, { id: 'gz', name: 'Z', refs: [] }] };
+    pending[0].resolve({ ok: false, status: 409, json: async () => ({ success: false, data: { layout: theirs } }) });
+    await flush();
+    expect(pending).toHaveLength(2);
+    expect(pending[1].body.baseVersion).toBe(9);
+    expect(pending[1].body.layout.groups.map((g: any) => g.name)).toEqual(['<Core & Ops>', 'Mine', 'Z']);
+    pending[1].resolve({
+      ok: true,
+      status: 200,
+      json: async () => ({ success: true, data: { layout: { ...pending[1].body.layout, version: 10 } } }),
+    });
+    await flush();
+    expect(app.tabLayout.version).toBe(10);
+    expect(app.showToast).not.toHaveBeenCalled();
+    // The read the failure deferred runs once the write settles.
+    expect(gets).toHaveLength(1);
+  });
+
+  it('replays only its own owner\'s recent copy of unsaved edits', async () => {
+    const copy = (extra: Record<string, unknown>) =>
+      win.sessionStorage.setItem(
+        'codeman:tab-layout-pending',
+        JSON.stringify({
+          owner: '@single',
+          baseVersion: 8,
+          savedAt: Date.now(),
+          operations: [{ type: 'renameGroup', groupId: 'gy', name: 'Replayed' }],
+          ...extra,
+        })
+      );
+    const replays = async (extra: Record<string, unknown>) => {
+      copy(extra);
+      const puts = installFetch();
+      makeApp();
+      await flush();
+      expect(win.sessionStorage.getItem('codeman:tab-layout-pending')).toBeNull();
+      return puts.length;
+    };
+    expect(await replays({})).toBe(1);
+    expect(await replays({ owner: 'alice' })).toBe(0);
+    expect(await replays({ savedAt: Date.now() - 5 * 60_000 })).toBe(0);
+    expect(await replays({ savedAt: undefined })).toBe(0);
+    expect(await replays({ baseVersion: 30 })).toBe(0);
+
+    // Multi-user: the copy is keyed by the user name.
+    win.__codemanUser = { username: 'alice', role: 'user', multiUser: true };
+    expect(await replays({ owner: 'alice' })).toBe(1);
+    expect(await replays({ owner: '@single' })).toBe(0);
+
+    // Identity not known yet: hold the copy until /api/me answers.
+    win.__codemanUser = undefined;
+    copy({});
+    const late = installFetch();
+    makeApp();
+    await flush();
+    expect(late).toHaveLength(0);
+    expect(win.sessionStorage.getItem('codeman:tab-layout-pending')).not.toBeNull();
+    win.__codemanUser = { username: 'admin', role: 'admin', multiUser: false };
+    document.dispatchEvent(new win.CustomEvent('codeman:me'));
+    await flush();
+    expect(late).toHaveLength(1);
+    expect(late[0].layout.groups[1].name).toBe('Replayed');
+  });
+
+  it('says so when a read has to drop edits it could not rebase', () => {
+    installFetch();
+    const app = makeApp();
+    app.editTabLayout({ type: 'renameGroup', groupId: 'gy', name: 'Unsent' });
+    // Not yet flushed (no write in flight), and the rebase refuses the read.
+    app._tabLayoutEditor.adoptExternal = () => false;
+    app._applyTabLayout(serverLayout(9));
+    expect(app.showToast).toHaveBeenCalledWith('Your tab group edit was not saved.', 'error');
+    expect(app._tabLayoutEditor).toBeNull();
+  });
+
   it('keeps unsaved edits across a reload: keepalive PUT now, rebased replay after', async () => {
     const puts = installFetch();
     const app = makeApp();
@@ -822,9 +996,11 @@ describe('server echoes and reloads', () => {
     );
     expect(puts.at(-1).baseVersion).toBe(8);
     expect(puts.at(-1).layout.groups[1].name).toBe('Unsaved');
-    expect(JSON.parse(win.sessionStorage.getItem('codeman:tab-layout-pending')).operations).toEqual([
-      { type: 'renameGroup', groupId: 'gy', name: 'Unsaved' },
-    ]);
+    const stored = JSON.parse(win.sessionStorage.getItem('codeman:tab-layout-pending'));
+    expect(stored.operations).toEqual([{ type: 'renameGroup', groupId: 'gy', name: 'Unsaved' }]);
+    expect(stored.owner).toBe('@single');
+    expect(stored.baseVersion).toBe(8);
+    expect(Math.abs(Date.now() - stored.savedAt)).toBeLessThan(5000);
 
     // Next page: the keepalive lost a race; the layout moved on to version 12.
     const next = installFetch();
@@ -842,7 +1018,12 @@ describe('server echoes and reloads', () => {
     // And when the keepalive DID land, nothing is re-sent.
     win.sessionStorage.setItem(
       'codeman:tab-layout-pending',
-      JSON.stringify({ operations: [{ type: 'renameGroup', groupId: 'gy', name: 'Later' }] })
+      JSON.stringify({
+        owner: '@single',
+        baseVersion: 8,
+        savedAt: Date.now(),
+        operations: [{ type: 'renameGroup', groupId: 'gy', name: 'Later' }],
+      })
     );
     const none = installFetch();
     makeApp();
@@ -850,6 +1031,12 @@ describe('server echoes and reloads', () => {
     expect(none).toHaveLength(0);
   });
 
+  it('keeps the group menu glyph visible where there is no hover (touch tablets)', () => {
+    const css = read('styles.css');
+    const block = css.match(/@media \(hover: none\) \{\s*html\[data-tab-orientation='vertical'\] \.tab-rail \.tab-layout-group-menu \{([^}]*)\}/);
+    expect(block?.[1]).toMatch(/opacity:\s*1/);
+  });
+
   it('leaves the flat rail byte-identical when the layout has no groups, and never edits off the rail', () => {
     installFetch();
     const noLayout = makeApp(null);