發佈 0.1.7：新增會話模式開關（獨立／共用）

摘要：
bot 設定新增「會話模式」：預設各聊天室獨立會話；可切為所有聊天室
共用一條記憶（單一專案助理情境）。共用模式下 /new 清除全部記憶，
/status 會顯示目前模式，bot 列表小字標示「共用會話」。

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/registry.js

@@ -78,6 +78,7 @@ async function listBots() {
       sandbox: cfg?.sandbox || null,
       model: cfg?.model || '',
       reasoningEffort: cfg?.reasoningEffort || '',
+      sharedSession: !!cfg?.sharedSession,
       serviceTier: cfg?.serviceTier || '',
       timeoutMinutes: cfg?.timeoutMinutes || null,
       tokenMasked: maskToken(cfg?.telegramToken),
@@ -112,7 +113,7 @@ function validateBotInput({ name, token, workDir, sandbox }, { isCreate }) {
   }
 }
 
-async function createBot({ name, token, workDir, sandbox, model, reasoningEffort, timeoutMinutes }) {
+async function createBot({ name, token, workDir, sandbox, model, reasoningEffort, sharedSession, timeoutMinutes }) {
   validateBotInput({ name, token, workDir, sandbox }, { isCreate: true });
   const reg = loadRegistry();
   if (reg.bots[name]) throw new Error(`已有同名 bot：${name}`);
@@ -128,6 +129,7 @@ async function createBot({ name, token, workDir, sandbox, model, reasoningEffort
     sandbox: sandbox || 'workspace-write',
     model: model || '',
     reasoningEffort: reasoningEffort || '',
+    sharedSession: !!sharedSession,
     serviceTier: 'priority', // 速度固定 Fast 1.5x
     timeoutMinutes: Number(timeoutMinutes) || 30,
     pm2Name: name,
@@ -158,6 +160,7 @@ async function updateBot(name, patch) {
   }
   if (patch.model !== undefined) raw.model = patch.model;
   if (patch.reasoningEffort !== undefined) raw.reasoningEffort = patch.reasoningEffort;
+  if (patch.sharedSession !== undefined) raw.sharedSession = !!patch.sharedSession;
   if (patch.timeoutMinutes !== undefined && Number(patch.timeoutMinutes) > 0) {
     raw.timeoutMinutes = Number(patch.timeoutMinutes);
   }