feat: /last and bind button for previous Q/A context (v0.3.4)

After attaching a session, show a button and /last command that load the latest human/assistant turn via session.history so phone users can continue with context.

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

lib/bridge.js

@@ -3,8 +3,9 @@ import { SessionId } from '@deepseek-ai/dsh-session/types';
 import { isAuthorized } from './auth.js';
 import { catalogFromLiveAgents, loadCatalog, truncateButton, visibleSessionsForWorkspace, workspacesWithVisibleSessions, } from './catalog.js';
 import { TelegramClient, } from './client.js';
-import { MSG, parseCommand } from './commands.js';
+import { MSG, LAST_CB, parseCommand } from './commands.js';
 import { markdownToHtml, splitMessage } from './format.js';
+import { formatLastTurn, loadLastTurn } from './history.js';
 import { describeAgent, displayLabel } from './label.js';
 import { formatModel, loadSessionModels, selectSessionModel, } from './models.js';
 const WS_CB = 'ws:';
@@ -14,6 +15,11 @@ const MODEL_CB = 'mdl:';
 const EFFORT_CB = 'me:';
 const BACK_MODEL_CB = 'mb';
 const MAX_BUTTONS = 40;
+function lastContextKeyboard() {
+    return {
+        inline_keyboard: [[{ text: '查看上次对话', callback_data: LAST_CB }]],
+    };
+}
 const defaultSleep = (ms) => new Promise((resolve) => setTimeout(resolve, ms));
 function contentToText(content) {
     return content
@@ -57,6 +63,7 @@ export class TelegramBridge {
         void this.client.setMyCommands([
             { command: 'start', description: '欢迎与用法' },
             { command: 'sessions', description: '按工作区列出并附着会话' },
+            { command: 'last', description: '查看上次问答（续接上下文）' },
             { command: 'model', description: '切换当前绑定会话的模型' },
             { command: 'status', description: '查看当前绑定' },
             { command: 'unbind', description: '断开手机绑定（不关闭本机会话）' },
@@ -112,6 +119,9 @@ export class TelegramBridge {
             case 'sessions':
                 await this.sendWorkspacePicker(chatId);
                 return;
+            case 'last':
+                await this.sendLastTurn(chatId);
+                return;
             case 'model':
                 await this.sendModelPicker(chatId);
                 return;
@@ -146,6 +156,11 @@ export class TelegramBridge {
         }
         const data = cq.data ?? '';
         const picker = this.pickers.get(String(chatId));
+        if (data === LAST_CB) {
+            await this.client.answerCallbackQuery(cq.id);
+            await this.sendLastTurn(chatId);
+            return;
+        }
         if (data === BACK_WS_CB) {
             await this.client.answerCallbackQuery(cq.id);
             await this.sendWorkspacePicker(chatId, picker?.catalog);
@@ -317,7 +332,24 @@ export class TelegramBridge {
             : displayLabel(parts);
         this.bindings.set(String(chatId), { chatId, sessionId: String(agent.id), label });
         await this.client.answerCallbackQuery(callbackId, '已附着');
-        await this.client.sendMessage(chatId, MSG.BOUND(label));
+        await this.client.sendMessage(chatId, MSG.BOUND(label), undefined, lastContextKeyboard());
+    }
+    async sendLastTurn(chatId) {
+        const binding = this.bindings.get(String(chatId));
+        if (!binding) {
+            await this.client.sendMessage(chatId, MSG.NEED_BIND);
+            return;
+        }
+        const agent = await this.ensureLiveAgent(binding.sessionId);
+        try {
+            const turn = await loadLastTurn(this.ctx, binding.sessionId, agent);
+            const text = formatLastTurn(turn);
+            await this.deliver(chatId, text);
+        }
+        catch (err) {
+            this.ctx.logger.warn(`dsh-telegram-channel: /last failed: ${this.redact(err)}`);
+            await this.client.sendMessage(chatId, MSG.LAST_FAILED);
+        }
     }
     async sendModelPicker(chatId) {
         const binding = this.bindings.get(String(chatId));