fix: Windows兼容 + Textual 8.x + MD3 SVG图标替代emoji

1. Windows: reuse_port 仅非win32平台启用
2. Textual 8.2.7: refresh() 加 **kwargs 兼容 repaint 参数
3. WebUI: 设置页/插件页 emoji → SVG (fill:currentColor 日夜间适配)

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

static/web_panel/pages/plugins.html

@@ -1,5 +1,5 @@
 <div class="plugin-page-root" style="padding:16px">
-  <h2 style="margin:0 0 12px 0">🔌 插件管理</h2>
+  <h2 style="margin:0 0 12px 0"><svg width="22" height="22" viewBox="0 0 24 24" style="vertical-align:-4px;margin-right:6px"><path fill="currentColor" d="M20.5 11H19V7c0-1.1-.9-2-2-2h-4V3.5C13 2.12 11.88 1 10.5 1S8 2.12 8 3.5V5H4c-1.1 0-1.99.9-1.99 2v3.8H3.5c1.49 0 2.7 1.21 2.7 2.7s-1.21 2.7-2.7 2.7H2V20c0 1.1.9 2 2 2h3.8v-1.5c0-1.49 1.21-2.7 2.7-2.7 1.49 0 2.7 1.21 2.7 2.7V22H17c1.1 0 2-.9 2-2v-4h1.5c1.38 0 2.5-1.12 2.5-2.5S21.88 11 20.5 11z"/></svg>插件管理</h2>
 
   <!-- ── 统计卡片 ── -->
   <div id="stats-card" style="display:flex;gap:12px;margin-bottom:16px;flex-wrap:wrap">
@@ -12,7 +12,7 @@
   <!-- ── 导入区域 ── -->
   <div style="display:flex;gap:16px;margin-bottom:16px;flex-wrap:wrap;align-items:stretch">
     <div class="import-card">
-      <div class="card-title">📦 导入 ZIP 包</div>
+      <div class="card-title"><svg width="18" height="18" viewBox="0 0 24 24" style="vertical-align:-3px;margin-right:4px"><path fill="currentColor" d="M20 6h-8l-2-2H4c-1.1 0-2 .9-2 2v12c0 1.1.9 2 2 2h16c1.1 0 2-.9 2-2V8c0-1.1-.9-2-2-2zm0 12H4V6h5.17l2 2H20v10z"/></svg>导入 ZIP 包</div>
       <label class="file-label" for="zip-file">选择 .zip 文件</label>
       <input type="file" id="zip-file" accept=".zip" class="file-input">
       <div class="card-actions">
@@ -21,7 +21,7 @@
       </div>
     </div>
     <div class="import-card">
-      <div class="card-title">📥 Git Clone 安装</div>
+      <div class="card-title"><svg width="18" height="18" viewBox="0 0 24 24" style="vertical-align:-3px;margin-right:4px"><path fill="currentColor" d="M9.4 16.6L4.8 12l4.6-4.6L8 6l-6 6 6 6 1.4-1.4zm5.2 0l4.6-4.6-4.6-4.6L16 6l6 6-6 6-1.4-1.4z"/></svg>Git Clone 安装</div>
       <input id="git-url" class="text-input" placeholder="https://github.com/user/repo.git">
       <div class="card-actions">
         <button class="btn btn-sm btn-filled" onclick="importGit()">Clone 安装</button>