修复旧版设计 Brief 媒介兼容

electron/image-workspace/works-square-workspace.ts

@@ -36,7 +36,7 @@ import {
 type ServerBrief = {
   version: number;
   status: DesignBrief['status'];
-  medium: DesignBrief['medium'];
+  medium?: DesignBrief['medium'];
   summary: string;
   ready: boolean;
   missing_decision: string | null;
@@ -219,10 +219,18 @@ const AGENT_RUN_TIMEOUT_MS = 10 * 60_000;
 const DESIGN_EVENT_DELIVERY_BARRIER_TIMEOUT_MS = 1_000;
 
 function mapBrief(brief: ServerBrief): DesignBrief {
+  const medium = brief.medium ?? null;
+  if (medium !== null && medium !== 'image' && medium !== 'video') {
+    throw new DesignWorkspaceModuleError(
+      502,
+      'DESIGN_WORKSPACE_RESPONSE_INVALID',
+      'AI 设计服务返回了无效的媒介类型',
+    );
+  }
   return {
     version: brief.version,
     status: brief.status,
-    medium: brief.medium,
+    medium,
     summary: brief.summary,
     ready: brief.ready,
     missingDecision: brief.missing_decision,
@@ -357,7 +365,10 @@ function isServerConversation(value: unknown): value is ServerConversation {
     && Boolean(brief)
     && Number.isInteger(brief?.version)
     && ['draft', 'ready', 'confirmed'].includes(String(brief?.status))
-    && (brief?.medium === null || brief?.medium === 'image' || brief?.medium === 'video')
+    && (brief?.medium === undefined
+      || brief.medium === null
+      || brief.medium === 'image'
+      || brief.medium === 'video')
     && typeof brief?.summary === 'string'
     && typeof brief?.ready === 'boolean'
     && (brief?.missing_decision === null || typeof brief?.missing_decision === 'string')