make the appType allow-list a prop instead of fourteen copies

Every locked screen shipped the same recursive normaliser: an ALLOWED_APP_TYPES set, a
normalizeLayout, a useMemo to apply it before the wrong panel could render, and a useEffect to
persist the fix. Fourteen copies, character-for-character identical except the two names — so a
fifteenth screen was a copy-paste, and a bug in the shape was a bug in fourteen places.

It is now `<WorkspaceView appTypes={{ allowed, fallback }} />`. WorkspaceView normalises before it
renders and persists the diff itself, which is the same two effects the screens were writing by hand.

One deliberate behaviour change: the framework normaliser drops `config` when it replaces an app.
The fourteen copies did `{ ...node, appType: fallback }`, keeping the old app's config on the panel
the new app now owns. That is the opposite of what `setApp` does, and a config belongs to whoever
wrote it.

Headscale keeps a local useMemo. Its check is not "is this appType allowed" but "is the server
picker present at all" — a layout saved before that panel existed is discarded for the default
wholesale. That is about a panel being missing, which the allow-list cannot see.

QrTransfer gains a persist-back it never had: it normalised on read and threw the result away every
time.

Tests: normalizeLayout is pinned on reference-identity for a no-op, null always allowed, config
dropped on replacement, rebuilding only changed branches, and idempotence — because a normaliser
that does not normalise to itself makes the persist-back an infinite write loop.

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

src/apps/officer-web/Screens/Dashboard/ChatHistory/index.tsx

@@ -1,4 +1,4 @@
-import { useEffect, useMemo, useRef } from 'react';
+import { useEffect, useRef } from 'react';
 import { useParams, useNavigate } from 'react-router';
 import type { LayoutNode, SelectedSession } from 'officerdev';
 import { WorkspaceView, chatListPath, cwdFromSplat } from 'officerdev';
@@ -11,28 +11,9 @@ import type { ClaudeSessionDetail } from 'state/useClaudeSessions';
 import { usePanelChannel } from 'hooks/usePanelChannel';
 import { defaultLayout } from './defaultLayout';
 
-// Allowed panel app types for the /chat screen
-const ALLOWED_APP_TYPES = new Set<string | null>(['chat-session-list', 'chat-detail', null]);
-
 // How many messages to render on first open (anchored to the bottom); scroll-up pages older ones in.
 const CHAT_TAIL = 20;
 
-/** Recursively fix any panel that uses a wrong app type (e.g. officerdev/chat) */
-function normalizeLayout(node: LayoutNode): LayoutNode {
-  if (node.type === 'panel') {
-    if (!ALLOWED_APP_TYPES.has(node.appType)) {
-      return { ...node, appType: 'chat-detail' };
-    }
-    return node;
-  }
-  const children = node.children.map((c) => {
-    const fixed = normalizeLayout(c.node);
-    return fixed === c.node ? c : { ...c, node: fixed };
-  });
-  const changed = children.some((c, i) => c !== node.children[i]);
-  return changed ? { ...node, children } : node;
-}
-
 type SessionListPageProps = {
   isNew?: boolean;
 };
@@ -45,25 +26,13 @@ export const SessionListPage = ({ isNew }: SessionListPageProps) => {
   const client = useClient();
   const selectedRef = useRef(selected);
   selectedRef.current = selected;
-  const rawWorkspace = useDashboardState<LayoutNode>('screens/chat', defaultLayout);
+  // A layout persisted before the chat panels were renamed still names `officerdev/chat`, which no
+  // longer resolves; `appTypes` lands anything unknown on the detail panel.
+  const workspace = useDashboardState<LayoutNode>('screens/chat', defaultLayout);
   const isMobile = useIsMobile();
   const navigate = useNavigate();
   const mobilePanelId = isMobile && (sessionId || isNew) ? 'chat-detail' : undefined;
 
-  // Normalize synchronously so the wrong panel never renders
-  const workspace = useMemo(() => {
-    const fixed = normalizeLayout(rawWorkspace.value);
-    if (fixed === rawWorkspace.value) return rawWorkspace;
-    return { ...rawWorkspace, value: fixed };
-  }, [rawWorkspace]);
-
-  // Persist the fix to the backend
-  useEffect(() => {
-    if (rawWorkspace.isLoaded && workspace.value !== rawWorkspace.value) {
-      rawWorkspace.setValue(workspace.value);
-    }
-  }, [rawWorkspace.isLoaded, workspace.value, rawWorkspace.value]);
-
   // Retire a legacy `?cwd=`. Nothing reads it any more and nothing writes it, but a refresh re-requests
   // the address bar verbatim — so one left over from before the path-based groups sits there forever,
   // looking like it means something. On a bare /chat it still says which group you wanted, so upgrade
@@ -133,6 +102,7 @@ export const SessionListPage = ({ isNew }: SessionListPageProps) => {
       <WorkspaceView
         workspace={workspace}
         locked
+        appTypes={{ allowed: ['chat-session-list', 'chat-detail'], fallback: 'chat-detail' }}
         mobilePanelId={mobilePanelId}
         onMobilePanelChange={(id) => {
           // Back goes to the group's list, not the default one. On /chat/g/* that group is in the URL;