fix(design): show submitted messages immediately

.project-docs/30-worklog/tasks/20260904-design-summary-separation-9c4e7a21.md

@@ -18,6 +18,10 @@
   canonical turn arrives.
 - Close the supported duplicate-stream path caused by overlapping event-source opens
   and repeated/out-of-order `chunkIndex` delivery.
+- Project a newly submitted chat command into the conversation immediately, before the
+  server returns the canonical turn. Keep the provisional message visually honest,
+  replace it with the canonical turn without duplication, and restore the draft after
+  a definitive failure.
 - Add focused Renderer and Store regression tests. Do not change Works Square server,
   Electron Main DTO/API, Current Specification authority, Quote/generation, Plugin
   navigation, packaging, publication, or the three foreign root task records.
@@ -37,6 +41,8 @@
   right-side “AI 听懂的想法” remains its secondary projection.
 - Keep Chinese-only copy, reduced-motion behavior, at least 40 px interactive targets,
   and the current responsive single-mount behavior.
+- Do not create a second chat state machine: the existing pending operation is the
+  provisional message identity, while only the returned Workspace turn is canonical.
 
 ## Project Context Loaded
 
@@ -60,6 +66,17 @@
 
 ## Outcome
 
+- A chat command now appears in the conversation immediately from its existing
+  `PendingDesignOperation`, before the server returns the canonical Workspace turn.
+  The provisional user bubble carries a small `发送中` state, changes to `正在确认`
+  for an unknown accepted outcome, and is filtered to the active Workspace.
+- While that exact draft is projected as a provisional bubble, the composer looks
+  cleared without deleting the stored draft. Canonical success atomically replaces
+  the provisional bubble with the persisted turn; definitive failure removes the
+  pending projection and naturally restores the original draft for correction/retry.
+- First-use guidance is hidden as soon as the first provisional user message exists.
+  Other in-flight Design input commands retain the existing composer lock, so the UX
+  change does not introduce concurrent reducer writes.
 - `DesignConversationPane` no longer renders raw `assistantStreams` prose as an
   assistant chat bubble. It renders one compact `role=status` surface that explicitly
   says the AI is organizing the idea and that the content is not a new reply. A
@@ -79,6 +96,20 @@
 
 ## Verification
 
+- New optimistic-message red baseline: Store publication passed, while the Renderer
+  regression failed because no `发送中` message existed, the first-use prompt remained,
+  and the composer still showed the submitted draft. After the fix, the two focused
+  files pass `27/27`, including submitting → unknown → canonical replacement.
+- Adjacent ImageCanvas, Store, Fine Tune, youth summary/projection/copy tests now pass
+  `6 files / 51 tests`.
+- Follow-up TypeScript `tsc --noEmit`, changed-file ESLint, and production
+  Renderer/Main/Preload/utility Vite build pass. Build output contains only the
+  existing browserslist, dynamic-import, and large-chunk warnings.
+- Electron/Playwright AI Design checks both pass individually: Prompt Museum media
+  isolation passed in the two-test run; the conversation/adjustment/Quote/Task flow
+  initially timed out at the pre-Design auth-fixture readiness gate, then passed `1/1`
+  in isolation in 1.8 seconds. The timeout occurred before this feature path and is
+  not recorded as product success evidence for the new provisional state.
 - Red baseline: three new regressions failed against the original implementation—raw
   unfinished prose had no progress role, an obsolete concurrent EventSource was not
   closed, and replaying chunk index `0` produced duplicated text. A fourth targeted red
@@ -108,8 +139,11 @@
 - Proposal: record that `design.assistant.delta` is unfinished progress, never a
   committed conversation turn. Renderer may show an explicit progress/uncertainty
   status but must not render its raw prose as a chat reply; only canonical persisted
-  turns enter the timeline. Concurrent/replayed stream delivery must converge by
+  turns enter the timeline. A locally submitted chat command may appear immediately as
-  connection generation and `chunkIndex`.
+  a clearly provisional user bubble by projecting its existing pending operation; it
+  must disappear when the canonical turn arrives and must not become a second semantic
+  message store. Concurrent/replayed stream delivery must converge by connection
+  generation and `chunkIndex`.
 - Evidence: the user screenshot, four red-before/green-after regressions, 49 adjacent
   tests, typecheck, scoped lint, production build, and 2/2 Electron E2E.
 - Future impact: later streaming polish must preserve the distinction between transient

src/pages/ImageCanvas/DesignConversationPane.tsx

@@ -1,5 +1,5 @@
 import { useEffect, useRef } from 'react';
-import { Loader2, MessageSquareText, Send, Sparkles } from 'lucide-react';
+import { Clock3, Loader2, MessageSquareText, Send, Sparkles } from 'lucide-react';
 import { toast } from 'sonner';
 import { Button } from '@/components/ui/button';
 import { Textarea } from '@/components/ui/textarea';
@@ -47,6 +47,19 @@ export function DesignConversationPane({ workspace }: { workspace: DesignWorkspa
   const assistantStreams = useImageWorkspaceStore((state) => state.assistantStreams);
   const pendingOperations = useImageWorkspaceStore((state) => state.pendingOperations);
   const scrollAnchorRef = useRef<HTMLDivElement>(null);
+  const pendingChatMessages = Object.values(pendingOperations).flatMap((operation) => {
+    const command = operation.command;
+    if (command.kind !== 'apply_input'
+      || command.workspaceId !== workspace.workspace.workspaceId
+      || command.input.kind !== 'chat') {
+      return [];
+    }
+    return [{
+      operationId: operation.id,
+      message: command.input.message,
+      status: operation.status,
+    }];
+  });
   const streamingOperationIds = Object.entries(assistantStreams)
     .filter(([, text]) => text.trim())
     .map(([operationId]) => operationId);
@@ -54,18 +67,24 @@ export function DesignConversationPane({ workspace }: { workspace: DesignWorkspa
   const hasUnknownAssistantProgress = streamingOperationIds.some(
     (operationId) => pendingOperations[operationId]?.status === 'unknown',
   );
-  const submittingChat = Object.values(pendingOperations).some(
+  const submittingDesignInput = Object.values(pendingOperations).some(
     (operation) => operation.status === 'submitting' && operation.command.kind === 'apply_input',
   );
+  const projectedDraft = chatDraft.trim() !== ''
+    && pendingChatMessages.some((message) => message.message === chatDraft.trim());
+  const composerDraft = projectedDraft ? '' : chatDraft;
+  const pendingChatKey = pendingChatMessages
+    .map((message) => `${message.operationId}:${message.status}`)
+    .join('|');
   useEffect(() => {
     const scrollAnchor = scrollAnchorRef.current;
     if (typeof scrollAnchor?.scrollIntoView === 'function') {
       scrollAnchor.scrollIntoView({ block: 'end' });
     }
-  }, [hasAssistantProgress, workspace.turns.length]);
+  }, [hasAssistantProgress, pendingChatKey, workspace.turns.length]);
 
   const submit = () => {
-    if (!chatDraft.trim() || submittingChat) return;
+    if (!composerDraft.trim() || submittingDesignInput) return;
     void sendChat().catch((error) => {
       toast.error(chatFailureMessage(error));
     });
@@ -87,7 +106,9 @@ export function DesignConversationPane({ workspace }: { workspace: DesignWorkspa
       </header>
 
       <div className="min-h-0 flex-1 overflow-y-auto px-4 py-5">
-        {workspace.turns.length === 0 && !hasAssistantProgress && (
+        {workspace.turns.length === 0
+          && pendingChatMessages.length === 0
+          && !hasAssistantProgress && (
           <div className="mx-auto flex h-full max-w-sm flex-col justify-center py-8">
             <div className="mb-5 flex h-11 w-11 items-center justify-center rounded-2xl bg-brand/[0.09] text-brand">
               <MessageSquareText className="h-5 w-5" />
@@ -128,6 +149,26 @@ export function DesignConversationPane({ workspace }: { workspace: DesignWorkspa
             </div>
           ))}
 
+          {pendingChatMessages.map((message) => (
+            <div
+              key={message.operationId}
+              data-testid={`pending-design-chat-${message.operationId}`}
+              aria-live="polite"
+              aria-atomic="true"
+              className="ml-auto max-w-[88%]"
+            >
+              <div className="rounded-2xl rounded-br-md bg-brand/90 px-3.5 py-2.5 text-sm leading-6 text-primary-foreground">
+                {message.message}
+              </div>
+              <div className="mt-1 flex items-center justify-end gap-1.5 pr-1 text-[11px] text-muted-foreground">
+                {message.status === 'submitting'
+                  ? <Loader2 className="h-3 w-3 animate-spin" aria-hidden="true" />
+                  : <Clock3 className="h-3 w-3" aria-hidden="true" />}
+                <span>{message.status === 'submitting' ? '发送中' : '正在确认'}</span>
+              </div>
+            </div>
+          ))}
+
           {hasAssistantProgress && (
             <div
               role="status"
@@ -158,14 +199,14 @@ export function DesignConversationPane({ workspace }: { workspace: DesignWorkspa
       <footer className="border-t border-border/70 bg-background p-4">
         <div className={cn(
           'rounded-2xl border border-border/80 bg-surface-input p-2 transition-colors focus-within:border-brand/35 focus-within:ring-2 focus-within:ring-brand/10',
-          submittingChat && 'opacity-80',
+          submittingDesignInput && 'opacity-80',
         )}>
           <Textarea
             id="design-chat-composer"
             aria-label="告诉 AI 你想创作什么"
-            value={chatDraft}
+            value={composerDraft}
             rows={3}
-            disabled={submittingChat}
+            disabled={submittingDesignInput}
             placeholder="比如：我想做一张社团招新海报，要热闹、有活力……"
             className="min-h-[72px] resize-none border-0 bg-transparent px-2 py-1.5 shadow-none focus-visible:ring-0 focus-visible:ring-offset-0"
             onChange={(event) => setChatDraft(event.currentTarget.value)}
@@ -182,11 +223,11 @@ export function DesignConversationPane({ workspace }: { workspace: DesignWorkspa
               type="button"
               size="icon"
               className="h-11 w-11 rounded-xl"
-              disabled={!chatDraft.trim() || submittingChat}
+              disabled={!composerDraft.trim() || submittingDesignInput}
               aria-label="发送消息"
               onClick={submit}
             >
-              {submittingChat
+              {submittingDesignInput
                 ? <Loader2 className="h-4 w-4 animate-spin" />
                 : <Send className="h-4 w-4" />}
             </Button>

tests/unit/image-canvas-page.test.tsx

@@ -1,4 +1,4 @@
-import { fireEvent, render, screen, waitFor, within } from '@testing-library/react';
+import { act, fireEvent, render, screen, waitFor, within } from '@testing-library/react';
 import { beforeEach, describe, expect, it, vi } from 'vitest';
 import { ImageWorkspaceApiError } from '@/lib/image-workspace';
 import { ImageCanvas } from '@/pages/ImageCanvas';
@@ -126,6 +126,82 @@ describe('youth AI Design Canvas page', () => {
     expect(within(conversation).queryByText(unfinishedDraft)).not.toBeInTheDocument();
   });
 
+  it('shows a submitted message immediately and replaces it with the canonical turn', async () => {
+    const message = '画一只在月球踢球的熊猫';
+    const { workspace } = prepareWorkspace({ turns: [] });
+    useImageWorkspaceStore.setState({
+      chatDraft: message,
+      pendingOperations: {
+        'operation-chat-1': {
+          id: 'operation-chat-1',
+          label: '发送消息',
+          command: {
+            kind: 'apply_input',
+            workspaceId: 'workspace-1',
+            sessionId: 'session-1',
+            expectedDirectionRevision: 4,
+            clientOperationId: 'operation-chat-1',
+            input: { kind: 'chat', message },
+          },
+          status: 'submitting',
+          error: null,
+          clearDraftPaths: [],
+          clearChatDraft: true,
+        },
+      },
+    });
+
+    render(<ImageCanvas />);
+
+    const conversation = screen.getByTestId('image-workspace-conversation');
+    const pendingMessage = within(conversation).getByTestId('pending-design-chat-operation-chat-1');
+    expect(within(pendingMessage).getByText(message)).toBeInTheDocument();
+    expect(within(pendingMessage).getByText('发送中')).toBeInTheDocument();
+    expect(within(conversation).queryByRole('heading', { name: '先把脑中的画面说出来' }))
+      .not.toBeInTheDocument();
+    expect(within(conversation).getByRole('textbox', { name: '告诉 AI 你想创作什么' }))
+      .toHaveValue('');
+
+    act(() => {
+      useImageWorkspaceStore.setState((state) => ({
+        pendingOperations: {
+          ...state.pendingOperations,
+          'operation-chat-1': {
+            ...state.pendingOperations['operation-chat-1']!,
+            status: 'unknown',
+          },
+        },
+      }));
+    });
+    expect(within(pendingMessage).getByText('正在确认')).toBeInTheDocument();
+    expect(within(conversation).getByRole('textbox', { name: '告诉 AI 你想创作什么' }))
+      .toHaveValue('');
+
+    act(() => {
+      useImageWorkspaceStore.setState({
+        workspace: {
+          ...workspace,
+          turns: [{
+            turnId: 'turn-2',
+            rawTurnSequence: 2,
+            userMessage: message,
+            assistantMessage: '听起来很有趣！你希望画面更像漫画，还是更像电影？',
+          }],
+        },
+        chatDraft: '',
+        pendingOperations: {},
+      });
+    });
+
+    await waitFor(() => {
+      expect(within(conversation).getAllByText(message)).toHaveLength(1);
+    });
+    expect(within(conversation).queryByTestId('pending-design-chat-operation-chat-1'))
+      .not.toBeInTheDocument();
+    expect(within(conversation).queryByText('发送中')).not.toBeInTheDocument();
+    expect(within(conversation).getByText(/更像漫画，还是更像电影/)).toBeInTheDocument();
+  });
+
   it('invites a free description and does not turn a legacy decision prompt into a form', () => {
     const workspace = designWorkspaceFixture({
       form: designFormFixture({

tests/unit/image-workspace-store.test.ts

@@ -223,6 +223,50 @@ describe('V2 Living Form store', () => {
     expect(useImageWorkspaceStore.getState().pendingOperations).toEqual({});
   });
 
+  it('publishes a pending chat operation before the server result settles', async () => {
+    await loadedStore();
+    const message = '画一只在月球踢球的熊猫';
+    const submission = deferred<Awaited<ReturnType<typeof submitImageWorkspaceCommand>>>();
+    submitCommandMock.mockReturnValueOnce(submission.promise);
+    useImageWorkspaceStore.getState().setChatDraft(message);
+
+    const sendPromise = useImageWorkspaceStore.getState().sendChat();
+
+    expect(useImageWorkspaceStore.getState()).toMatchObject({
+      chatDraft: message,
+      pendingOperations: {
+        'operation-1': {
+          id: 'operation-1',
+          status: 'submitting',
+          clearChatDraft: true,
+          command: {
+            kind: 'apply_input',
+            workspaceId: 'workspace-1',
+            clientOperationId: 'operation-1',
+            input: { kind: 'chat', message },
+          },
+        },
+      },
+    });
+
+    const workspace = designWorkspaceFixture({
+      turns: [{
+        turnId: 'turn-2',
+        rawTurnSequence: 2,
+        userMessage: message,
+        assistantMessage: '你希望画面更像漫画，还是更像电影？',
+      }],
+    });
+    submission.resolve({ clientOperationId: 'operation-1', runId: 'run-2', workspace });
+    await sendPromise;
+
+    expect(useImageWorkspaceStore.getState()).toMatchObject({
+      workspace,
+      chatDraft: '',
+      pendingOperations: {},
+    });
+  });
+
   it('settles a definitive reasoner failure without losing the chat draft', async () => {
     const source = await loadedStore();
     useImageWorkspaceStore.getState().setChatDraft('画一只会做饭的机器人');