fix(webui): derive temporary chats from session policy

webui/src/components/thread/ThreadComposer.tsx

@@ -85,7 +85,6 @@ import { useMediaQuery } from "@/hooks/useMediaQuery";
 import type { SendAttachment, SendOptions } from "@/hooks/useNanobotStream";
 import { usePageVisibility } from "@/hooks/usePageVisibility";
 import { useVoiceRecorder, type VoiceRecorderErrorKey } from "@/hooks/useVoiceRecorder";
-import { isTemporaryChatId } from "@/lib/temporary-chat";
 import type {
   CliAppInfo,
   ChatSummary,
@@ -444,9 +443,7 @@ function storeSlashRecents(commands: string[]): void {
 
 function queuedPromptsStorageKey(key?: string | null): string | null {
   const clean = key?.trim();
-  return clean && !isTemporaryChatId(clean)
-    ? `${QUEUED_PROMPTS_STORAGE_PREFIX}${clean}`
-    : null;
+  return clean ? `${QUEUED_PROMPTS_STORAGE_PREFIX}${clean}` : null;
 }
 
 function normalizeQueuedSessionMentions(value: unknown): SessionMention[] {

webui/src/components/thread/ThreadShell.tsx

@@ -33,7 +33,6 @@ import {
 } from "@/lib/mcp-preset-events";
 import type { CanonicalRunSnapshot, StreamError } from "@/lib/nanobot-client";
 import { inferProviderFromModelName, providerDisplayLabel } from "@/lib/provider-brand";
-import { isTemporaryChatId } from "@/lib/temporary-chat";
 import type {
   ChatSummary,
   SettingsPayload,
@@ -677,6 +676,7 @@ export function ThreadShell({
   const viewportRef = useRef<ThreadViewportHandle | null>(null);
   const activeViewportTurnByChatIdRef = useRef<Map<string, string>>(new Map());
   const messageCacheRef = useRef<Map<string, UIMessage[]>>(new Map());
+  const knownTemporaryChatIdsRef = useRef(new Set<string>());
   /** Last chatId we associated with the in-memory thread (for cache-on-switch). */
   const prevChatIdForCacheRef = useRef<string | null>(null);
   /** Skip one message-cache write right after chatId changes (messages may not match yet). */
@@ -753,10 +753,12 @@ export function ThreadShell({
 
   useEffect(() => {
     const retained = new Set(temporaryChatIds);
-    for (const cachedChatId of messageCacheRef.current.keys()) {
-      if (isTemporaryChatId(cachedChatId) && !retained.has(cachedChatId)) {
+    for (const chatId of retained) knownTemporaryChatIdsRef.current.add(chatId);
+    for (const cachedChatId of knownTemporaryChatIdsRef.current) {
+      if (!retained.has(cachedChatId)) {
         messageCacheRef.current.delete(cachedChatId);
         activeViewportTurnByChatIdRef.current.delete(cachedChatId);
+        knownTemporaryChatIdsRef.current.delete(cachedChatId);
       }
     }
   }, [temporaryChatIds]);
@@ -1435,7 +1437,7 @@ export function ThreadShell({
           workspaceScopeDisabled={workspaceScopeDisabled}
           workspaceError={workspaceError}
           onWorkspaceScopeChange={onWorkspaceScopeChange}
-          pendingQueueKey={chatId}
+          pendingQueueKey={temporary ? null : chatId}
           transcriptionProvider={settingsSnapshot?.transcription?.provider}
           ingressLimits={ingressLimits}
           quotedContext={quotedContext}