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>

services/internet_service.py

@@ -48,11 +48,15 @@ class InternetService:
             self.http_runner = web.AppRunner(self.http_app)
             await self.http_runner.setup()
             
+            # SO_REUSEPORT: Linux/macOS only, Windows 不支持
+            import sys as _sys
+            _reuse_port = _sys.platform != "win32"
+
             # 1. 启动 HTTP 站点
             try:
                 self.site = web.TCPSite(
-                    self.http_runner, self.http_host, self.http_port, 
-                    reuse_address=True, reuse_port=True
+                    self.http_runner, self.http_host, self.http_port,
+                    reuse_address=True, reuse_port=_reuse_port,
                 )
                 await self.site.start()
                 logger.info(f"✅ HTTP 服务已绑定: {self.http_host}:{self.http_port}")
@@ -60,12 +64,12 @@ class InternetService:
                 logger.error(f"❌ HTTP 端口 {self.http_port} 绑定失败: {e}")
                 await self.http_runner.cleanup()
                 return False
-            
+
             # 2. 启动 WebSocket 站点 (独立端口)
             try:
                 self.ws_site = web.TCPSite(
-                    self.http_runner, self.ws_host, self.ws_port, 
-                    reuse_address=True, reuse_port=True
+                    self.http_runner, self.ws_host, self.ws_port,
+                    reuse_address=True, reuse_port=_reuse_port,
                 )
                 await self.ws_site.start()
                 logger.info(f"✅ WebSocket 服务已绑定: {self.ws_host}:{self.ws_port}")