chore: 版本号 0.14.6 → 0.14.7

fix: onNewIteration 只在 THINKING 状态调用，消除每状态切换的冗余触发
fix: renderMessages 全量清空重建，去掉增量 diff 的边界 bug
fix: 空消息跳过增加 think 判断，纯思考卡片不再被吞掉
fix: updateMessageToolRecord 改为空函数，工具卡片统一由 onDone 挂载

src/renderer/index.html

@@ -28,7 +28,7 @@
         <div class="header-left">
             <span class="logo">🦙</span>
             <span class="app-title">Metona Ollama</span>
-            <span class="app-version">v0.14.6</span>
+            <span class="app-version">v0.14.7</span>
             <button class="icon-btn help-btn" id="btnHelp" title="使用帮助">
                 <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
                     <circle cx="12" cy="12" r="10"/><path d="M9.09 9a3 3 0 0 1 5.83 1c0 2-3 3-3 3"/>