fix(design): preserve command outcome certainty

src/lib/host-api.ts

@@ -112,14 +112,23 @@ async function parseResponse<T>(response: Response): Promise<T> {
   if (!response.ok) {
     let message = `${response.status} ${response.statusText}`;
     let backendCode: string | undefined;
+    let commandOutcome: string | undefined;
     try {
-      const payload = await response.json() as { error?: string; code?: unknown };
+      const payload = await response.json() as {
+        error?: string;
+        code?: unknown;
+        commandOutcome?: unknown;
+      };
       if (payload?.error) {
         message = payload.error;
       }
       if (typeof payload?.code === 'string' && /^[a-z][a-z0-9_]{0,63}$/u.test(payload.code)) {
         backendCode = payload.code;
       }
+      if (payload?.commandOutcome === 'definitive_failure'
+        || payload?.commandOutcome === 'unknown') {
+        commandOutcome = payload.commandOutcome;
+      }
     } catch {
       // ignore body parse failure
     }
@@ -127,6 +136,7 @@ async function parseResponse<T>(response: Response): Promise<T> {
       source: 'browser-fallback',
       status: response.status,
       ...(backendCode ? { backendCode } : {}),
+      ...(commandOutcome ? { commandOutcome } : {}),
     });
   }
 
@@ -155,6 +165,9 @@ function createProxyHttpError(data: HostApiProxyData): Error {
   return normalizeAppError(new Error(message), {
     status: data.status,
     ...(payload && typeof payload.code === 'string' ? { backendCode: payload.code } : {}),
+    ...(payload?.commandOutcome === 'definitive_failure' || payload?.commandOutcome === 'unknown'
+      ? { commandOutcome: payload.commandOutcome }
+      : {}),
   });
 }
 

src/lib/image-workspace.ts

@@ -12,6 +12,7 @@ import {
   designAssetDownloadPath,
   type DesignAsset,
   type DesignAssetSaveResult,
+  type DesignCommandFailureOutcome,
   type DesignCommandInput,
   type DesignCommandResult,
   type DesignDeleteWorkspaceResult,
@@ -24,6 +25,7 @@ type ImageWorkspaceEnvelope<T> = {
   status?: number;
   code?: string;
   error?: string;
+  commandOutcome?: DesignCommandFailureOutcome;
   data?: T;
 };
 
@@ -32,12 +34,19 @@ export const IMAGE_WORKSPACE_CREATE_PROJECT_EVENT = 'niancode:image-workspace:cr
 export class ImageWorkspaceApiError extends Error {
   readonly status: number;
   readonly code: string;
+  readonly commandOutcome?: DesignCommandFailureOutcome;
 
-  constructor(status: number, code: string, message: string) {
+  constructor(
+    status: number,
+    code: string,
+    message: string,
+    commandOutcome?: DesignCommandFailureOutcome,
+  ) {
     super(message);
     this.name = 'ImageWorkspaceApiError';
     this.status = status;
     this.code = code;
+    this.commandOutcome = commandOutcome;
   }
 }
 
@@ -66,6 +75,11 @@ function getErrorCode(error: unknown, status: number): string {
   return 'IMAGE_WORKSPACE_REQUEST_FAILED';
 }
 
+function getCommandOutcome(error: unknown): DesignCommandFailureOutcome | undefined {
+  const outcome = error instanceof AppError ? error.details?.commandOutcome : undefined;
+  return outcome === 'definitive_failure' || outcome === 'unknown' ? outcome : undefined;
+}
+
 async function requestData<T>(path: string, init: RequestInit = {}): Promise<T> {
   let response: ImageWorkspaceEnvelope<T>;
   try {
@@ -76,6 +90,7 @@ async function requestData<T>(path: string, init: RequestInit = {}): Promise<T>
       status,
       getErrorCode(error, status),
       error instanceof Error ? error.message : IMAGE_WORKSPACE_UNAVAILABLE_MESSAGE,
+      getCommandOutcome(error),
     );
   }
 
@@ -84,6 +99,7 @@ async function requestData<T>(path: string, init: RequestInit = {}): Promise<T>
       response.status ?? 502,
       response.code ?? 'IMAGE_WORKSPACE_REQUEST_FAILED',
       response.error ?? 'AI 设计请求失败',
+      response.commandOutcome,
     );
   }
   return response.data;