feat(desktop): composer queue — queue many, edit/delete/cancel-edit, Cursor-style

Press Enter while busy with a draft to queue it; with no draft to interrupt
and send the next queued turn. Auto-drains one queued turn each time the
session settles, same as Cursor. Queue persists across reloads so an
interrupted-and-queued turn isn't lost on refresh.

Each queued row supports edit-in-composer (with explicit Save/Cancel),
send-now (↑), and delete. Drain skips only the entry currently being
edited so the rest of the queue keeps flowing.

Queue dequeue is transactional — an entry only leaves the queue after
`prompt.submit` is accepted, so a rejected submit doesn't drop the turn.

Also shrinks the `[interrupted]` marker to a muted one-liner and drops
its assistant footer so it stops looking like a real reply.

apps/desktop/src/app/session/hooks/use-session-actions.ts

@@ -7,6 +7,7 @@ import { type ChatMessage, chatMessageText, toChatMessages } from '@/lib/chat-me
 import { normalizePersonalityValue } from '@/lib/chat-runtime'
 import { embeddedImageUrls, textWithoutEmbeddedImages } from '@/lib/embedded-images'
 import { clearComposerAttachments, clearComposerDraft } from '@/store/composer'
+import { clearQueuedPrompts } from '@/store/composer-queue'
 import { $pinnedSessionIds } from '@/store/layout'
 import { clearNotifications, notify, notifyError } from '@/store/notifications'
 import { requestDesktopOnboarding } from '@/store/onboarding'
@@ -649,6 +650,11 @@ export function useSessionActions({
         }
 
         await deleteSession(storedSessionId)
+        clearQueuedPrompts(storedSessionId)
+
+        if (closingRuntimeId) {
+          clearQueuedPrompts(closingRuntimeId)
+        }
       } catch (err) {
         if (removed) {
           setSessions(prev => [removed, ...prev])