feat(coding): add conversation archive and first-message titles

electron/api/coding-composition.ts

@@ -555,6 +555,7 @@ export function createCodingComposition(
       await agentServer.stop();
     },
     async shutdown() {
+      conversations.dispose();
       gameResourceDelivery.dispose();
       previewDataSession?.dispose();
       if (typeof options.browser.configurePreviewDataSession === 'function') {

electron/api/routes/coding-conversations.ts

@@ -89,7 +89,8 @@ export async function handleCodingConversationRoutes(
             res,
             event.type,
             event,
-            `${event.conversationId}:${event.workerGeneration}:${event.toSeq}`,
+            event.type === 'conversation.metadata-changed' ? undefined
+              : `${event.conversationId}:${event.workerGeneration}:${event.type === 'snapshot' ? event.seq : event.toSeq}`,
           )) break;
         }
       } finally {

electron/api/routes/coding-route-errors.ts

@@ -10,6 +10,7 @@ const FIXED_CODING_ERROR_MESSAGES: Readonly<Record<string, string>> = {
   CODING_AGENT_NOT_FOUND: '当前伙伴不可用，请重新选择。',
   CODING_AGENT_ID_IMMUTABLE: '已有伙伴标识不能修改。',
   CODING_CONVERSATION_NOT_FOUND: '指定的对话不存在。',
+  CODING_CONVERSATION_ARCHIVED: '请先恢复已归档的对话，再继续操作。',
   CODING_CONVERSATION_REQUEST_INVALID: '对话请求无效，请检查输入。',
   CODING_FILE_NOT_FOUND: '指定的项目文件不存在。',
   CODING_FILE_REQUEST_INVALID: '文件请求无效，请检查输入。',