feat: 按机器人选择 Agent Preset

在九个渠道的设置页卡片上选择 Host 已有预设；未选则跟随默认，只影响之后新建的会话。

Co-authored-by: Cursor <cursoragent@cursor.com>

plugin-src/client/channels/weixin/api.js

@@ -1,3 +1,5 @@
+import { normalizeAgentPresetCatalog, normalizeAgentPresetId, SET_AGENT_PRESET_ENDPOINT } from '../../agent-preset.js';
+
 export const WEIXIN_RPC_CHANNEL = '/weixin';
 export const WEIXIN_ENDPOINTS = Object.freeze({
   status: 'connection.status',
@@ -8,6 +10,7 @@ export const WEIXIN_ENDPOINTS = Object.freeze({
   reconnectBot: 'bot.reconnect',
   deleteBot: 'bot.delete',
   setWorkspace: 'bot.workspace.set',
+  setAgentPreset: SET_AGENT_PRESET_ENDPOINT,
 });
 
 const ACCOUNT_STATES = new Set(['connected', 'connecting', 'offline', 'error']);
@@ -115,6 +118,7 @@ function normalizeBot(value) {
     connected,
     configured: value.configured === true,
     workspace: string(value.workspace).slice(0, 4_096),
+    agentPreset: normalizeAgentPresetId(value.agentPreset),
     bot: {
       name: string(value.bot.name, '微信机器人'),
       accountIdMasked: string(value.bot.accountIdMasked, '已安全保存'),
@@ -153,6 +157,7 @@ export function normalizeSnapshot(value) {
     },
     provisioning: value.provisioning ? normalizeProvisioning(value.provisioning) : null,
     testMessage: normalizeTestMessage(value.testMessage),
+    agentPresetCatalog: normalizeAgentPresetCatalog(value.agentPresetCatalog),
   };
 }