fix: a clearer chat mark in the empty chat (two bubbles), a bigger send plane

internal/server/web/static/ai.js

@@ -6,7 +6,7 @@
 // On by default; the user can turn it off in the profile.
 (function () {
   'use strict';
-  const PLANE = '<svg class="ai-plane" width="20" height="20" viewBox="0 0 24 24" fill="currentColor"><path d="M3.4 20.4 20.85 12.9a1 1 0 0 0 0-1.8L3.4 3.6a1 1 0 0 0-1.39 1.17L4 11l9 1-9 1-1.99 6.23a1 1 0 0 0 1.39 1.17z"/></svg>';
+  const PLANE = '<svg class="ai-plane" width="24" height="24" viewBox="0 0 24 24" fill="currentColor"><path d="M3.4 20.4 20.85 12.9a1 1 0 0 0 0-1.8L3.4 3.6a1 1 0 0 0-1.39 1.17L4 11l9 1-9 1-1.99 6.23a1 1 0 0 0 1.39 1.17z"/></svg>';
   const STOP = '<svg width="14" height="14" viewBox="0 0 24 24" fill="currentColor"><rect x="5" y="5" width="14" height="14" rx="2"/></svg>';
   const esc = v => String(v).replace(/[&<>"]/g, c => ({'&': '&amp;', '<': '&lt;', '>': '&gt;', '"': '&quot;'}[c]));
   const fab = document.createElement('button');
@@ -24,7 +24,7 @@
     '<span class="muted ai-where"></span><span class="spacer"></span>' +
     '<button type="button" class="btn ghost small icon close x ai-close" aria-label="Закрыть"><svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.6" stroke-linecap="round"><path d="M18 6 6 18M6 6l12 12"/></svg></button></div>' +
     '<div class="ai-chats" inert><div class="ai-chats-in"><button type="button" class="ai-chatnew">+ Новый чат</button><div class="ai-chatlist"></div></div></div>' +
-    '<div class="ai-chat-body"><div class="ai-list"><div class="ai-hello"><span class="ai-hello-icon"><svg width="30" height="30" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.6" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="M20 12.5a7.5 7.5 0 0 1-11.06 6.6L4 20.5l1.4-4.6A7.5 7.5 0 1 1 20 12.5z"/><path d="M8.6 12.5h.01M12.5 12.5h.01M16.4 12.5h.01" stroke-width="2.4"/></svg></span><span class="ai-hello-text">Спросите AI помощника</span></div></div>' +
+    '<div class="ai-chat-body"><div class="ai-list"><div class="ai-hello"><span class="ai-hello-icon"><svg width="28" height="28" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.6" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="M14 9a2 2 0 0 1-2 2H6l-4 4V4a2 2 0 0 1 2-2h8a2 2 0 0 1 2 2z"/><path d="M18 9h2a2 2 0 0 1 2 2v11l-4-4h-6a2 2 0 0 1-2-2v-1"/></svg></span><span class="ai-hello-text">Спросите AI помощника</span></div></div>' +
     '<button type="button" class="ai-jump" hidden title="К последним сообщениям" aria-label="К последним сообщениям"><svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.4" stroke-linecap="round" stroke-linejoin="round"><path d="M12 5v14M5 12l7 7 7-7"/></svg></button></div>' +
     '<div class="ai-pills">' +
     '<button type="button" class="ai-pill" data-mode="agent" aria-pressed="false" title="Сам выполняет шаги один за другим, спрашивая перед каждой командой и записью файла">' +