fix: keep typing indicator alive during entire response (not just until first token)

The old logic stopped typing on first stream token, leaving tool
execution gaps (30s+) with zero visual feedback. Now typing persists
until the full response + streaming edits are complete.

src/bot/index.js

@@ -1087,13 +1087,10 @@ export async function initBot(config, api, tools, skills, agents) {
     logger.info(`${prefix} ${user}: ${text.substring(0, 80)}…`);
 
     await queueRequest(key, text, async () => {
-      // ── Typing indicator: keep pinging until first stream token arrives ──
-      let firstTokenArrived = false;
+      // ── Typing indicator: keep pinging until response is fully complete ──
       const typingInterval = setInterval(async () => {
-        if (firstTokenArrived) return;
         try {
           await ctx.api.sendChatAction(ctx.chat.id, 'typing');
-          logger.debug('⌨️ typing ping');
         } catch (e) { logger.warn(`⌨️ typing error: ${e.message}`); }
       }, 4000); // Telegram typing expires after 5s, refresh every 4s
       try {
@@ -1121,7 +1118,6 @@ export async function initBot(config, api, tools, skills, agents) {
       // Wrap chatWithAI with self-correction + streaming
       const chatWithCorrection = withSelfCorrection(async (msgs) => {
         return await chatWithAI(msgs, { onDelta: (token) => {
-          if (!firstTokenArrived) firstTokenArrived = true;
           consumer.onDelta(token);
         }});
       });
@@ -1133,7 +1129,6 @@ export async function initBot(config, api, tools, skills, agents) {
       if (result) await conversation.add(chatKey, 'assistant', result);
 
       // Stop typing indicator
-      firstTokenArrived = true;
       clearInterval(typingInterval);
       logger.info('⌨️ typing stopped (response complete)');