fix(design): preserve command outcome certainty

src/stores/image-workspace.ts

@@ -137,9 +137,11 @@ function isUnavailableError(error: unknown): boolean {
 
 function isDirectionConflict(error: unknown): boolean {
   return error instanceof ImageWorkspaceApiError
-    && (error.status === 409
-      || error.code === 'DESIGN_DIRECTION_REVISION_CONFLICT'
-      || error.code === 'DIRECTION_REVISION_CONFLICT');
+    && [
+      'design_revision_conflict',
+      'design_direction_revision_conflict',
+      'direction_revision_conflict',
+    ].includes(error.code.toLowerCase());
 }
 
 function isQuoteBlocked(error: unknown): boolean {
@@ -147,6 +149,15 @@ function isQuoteBlocked(error: unknown): boolean {
     && error.code.toLowerCase() === 'design_quote_blocked';
 }
 
+function isDefinitiveCommandFailure(error: unknown): error is ImageWorkspaceApiError {
+  return error instanceof ImageWorkspaceApiError
+    && error.commandOutcome === 'definitive_failure';
+}
+
+function isUnknownCommandOutcome(error: unknown): boolean {
+  return error instanceof ImageWorkspaceApiError && error.commandOutcome === 'unknown';
+}
+
 function parseWorkspaceEvent(event: Event): DesignWorkspaceEvent | null {
   const data = (event as MessageEvent<unknown>).data;
   if (typeof data !== 'string') return null;
@@ -299,7 +310,16 @@ export const useImageWorkspaceStore = create<ImageWorkspaceState>((set, get) =>
       return result.workspace;
     } catch (error) {
       const message = messageForError(error);
-      if (isDirectionConflict(error)) {
+      if (isUnknownCommandOutcome(error)) {
+        set((state) => ({
+          pendingOperations: {
+            ...state.pendingOperations,
+            [operation.id]: { ...operation, status: 'unknown', error: message },
+          },
+          ...(isAuthError(error) ? { status: 'auth-required' as const } : {}),
+          error: '操作结果尚未确认，可使用同一操作标识安全重试',
+        }));
+      } else if (isDirectionConflict(error)) {
         set((state) => {
           const pendingOperations = { ...state.pendingOperations };
           delete pendingOperations[operation.id];
@@ -318,6 +338,15 @@ export const useImageWorkspaceStore = create<ImageWorkspaceState>((set, get) =>
           delete pendingOperations[operation.id];
           return { pendingOperations, error: null };
         });
+      } else if (isDefinitiveCommandFailure(error)) {
+        set((state) => {
+          const pendingOperations = { ...state.pendingOperations };
+          delete pendingOperations[operation.id];
+          const assistantStreams = { ...state.assistantStreams };
+          delete assistantStreams[operation.id];
+          return { pendingOperations, assistantStreams, error: message };
+        });
+        if (error.status === 409) await get().refreshWorkspace().catch(() => null);
       } else {
         set((state) => ({
           pendingOperations: {