完善客户端模块与工作区能力

shared/agent-session.ts

@@ -0,0 +1,15 @@
+export type AgentSessionMessageRole = 'user' | 'assistant';
+
+export type AgentSessionMessage = {
+  id?: string;
+  role: AgentSessionMessageRole;
+  created_at?: string;
+  text: string;
+};
+
+export type AgentSessionData = {
+  project_id: string;
+  session_id: string;
+  updated_at: string;
+  messages: AgentSessionMessage[];
+};

shared/image-workspace.ts

@@ -61,6 +61,8 @@ export type DesignConversationSummary = {
   conversationId: string;
   workspaceId: string;
   title: string;
+  /** A compact preview for history navigation; full messages are loaded on selection. */
+  latestMessagePreview?: string | null;
   turnRevision: number;
   phase: DesignWorkspacePhase;
   brief: DesignBrief;

shared/project-config.ts

@@ -19,6 +19,7 @@ export type ProjectAgentResponsibility = {
 export type ProjectAgentConfig = {
   id: string;
   avatarId: string;
+  avatarDataUrl?: string;
   roleName: string;
   name: string;
   builtIn: boolean;
@@ -33,6 +34,16 @@ export type ProjectAgentConfig = {
   updatedAt?: string;
 };
 
+export const MAX_PROJECT_AGENT_AVATAR_DATA_URL_LENGTH = 800_000;
+
+const PROJECT_AGENT_AVATAR_DATA_URL_PATTERN = /^data:image\/(?:webp|png|jpeg);base64,[A-Za-z0-9+/]+={0,2}$/u;
+
+export function isProjectAgentAvatarDataUrl(value: unknown): value is string {
+  return typeof value === 'string'
+    && value.length <= MAX_PROJECT_AGENT_AVATAR_DATA_URL_LENGTH
+    && PROJECT_AGENT_AVATAR_DATA_URL_PATTERN.test(value);
+}
+
 export type ProjectConfig = {
   schemaVersion: 1;
   projectType: ProjectType;