feat(layout): 添加 SVG 图标系统并更新侧边栏导航

- 引入 Sprite 组件统一管理 SVG 图标
- 创建 Icon 组件支持动态加载图标- 定义 icon-ids 类型确保图标引用安全- 更新 Sidebar 使用新图标组件替换 emoji
- 添加 HomeIcon 和 network 图标资源- 调整侧边栏样式和宽度
- 修复 Header 按钮 title 属性替代 aria-label
- 新增 IP 工具页面路由
- 添加全局阴影变量 --main-border-shadow

src/lib/assets/icon/sprite.svg

@@ -1,3 +1,21 @@
 <svg xmlns="http://www.w3.org/2000/svg" style="display:none" >
+    <symbol id="home" viewBox="0 0 20 20">
+        <g fill="none">
+            <path fill="url(#home-SVGDx0DLj5H)" d="M13.18 2H10.5C8.768 7.023 6.823 12.62 6.823 18h6.483a1.75 1.75 0 0 0 1.485-.825l3.998-6.42a1.43 1.43 0 0 0 0-1.51L14.98 3.13A2 2 0 0 0 13.18 2"/>
 
+            <path fill="url(#home-SVGpR69Vbpe)" fill-opacity="0.5" d="M13.18 2H10.5C8.768 7.023 6.823 12.62 6.823 18h6.483a1.75 1.75 0 0 0 1.485-.825l3.998-6.42a1.43 1.43 0 0 0 0-1.51L14.98 3.13A2 2 0 0 0 13.18 2"/>
+
+            <path fill="url(#home-SVGFEeptdiY)" d="M13.25 2.001H6.69c-.601 0-1.16.308-1.48.816l-3.942 6.25a1.75 1.75 0 0 0 0 1.867L5.13 17.06c.354.56.96.91 1.619.938l.067.002h.006a2 2 0 0 0 1.969-1.662l.003-.002L11.18 3.953a2 2 0 0 1 2.069-1.952"/>
+
+            <path fill="url(#home-SVGIBIxBcZq)" fill-opacity="0.4" d="M13.25 2.001H6.69c-.601 0-1.16.308-1.48.816l-3.942 6.25a1.75 1.75 0 0 0 0 1.867L5.13 17.06c.354.56.96.91 1.619.938l.067.002h.006a2 2 0 0 0 1.969-1.662l.003-.002L11.18 3.953a2 2 0 0 1 2.069-1.952"/>
+
+            <defs>
+                <radialGradient id="home-SVGDx0DLj5H" cx="0" cy="0" r="1" gradientTransform="rotate(-87.881 17.698 4.836)scale(23.3302 18.6978)" gradientUnits="userSpaceOnUse"><stop stop-color="#ffc470"/><stop offset=".251" stop-color="#ff835c"/><stop offset=".584" stop-color="#f24a9d"/><stop offset=".871" stop-color="#b339f0"/><stop offset="1" stop-color="#c354ff"/></radialGradient>
+                <radialGradient id="home-SVGpR69Vbpe" cx="0" cy="0" r="1" gradientTransform="matrix(-9.9932 -9.83058 9.94854 -10.1131 11.777 16.154)" gradientUnits="userSpaceOnUse"><stop offset=".709" stop-color="#ffb357" stop-opacity="0"/><stop offset=".942" stop-color="#ffb357"/></radialGradient>
+                <radialGradient id="home-SVGFEeptdiY" cx="0" cy="0" r="1" gradientTransform="rotate(-160.247 10.243 6.665)scale(22.9945 19.4416)" gradientUnits="userSpaceOnUse"><stop offset=".222" stop-color="#4e46e2"/><stop offset=".578" stop-color="#625df6"/><stop offset=".955" stop-color="#e37dff"/></radialGradient>
+                <linearGradient id="home-SVGIBIxBcZq" x1="4.823" x2="10.254" y1="8.629" y2="9.914" gradientUnits="userSpaceOnUse"><stop stop-color="#7563f7" stop-opacity="0"/><stop offset=".986" stop-color="#4916ae"/></linearGradient>
+            </defs>
+        </g>
+    </symbol>
+    <symbol id="network" viewBox="0 0 24 24"><path fill="currentColor" d="M7 7H5V6H4V4h1V3h2v1h1v2H7zm-2 4h1v3H5v1H2v-1H1v-3h1v-1h3zm4-3h1v1H9zm6 7h1v1h-1zm2-7h1v1h-1zM8 7h1v1H8zm-1 5h1v1H7z"/><path fill="currentColor" d="M16 14v-3h-1v-1h-1V9h-3v1h-1v1H9v3h1v1h1v1h3v-1h1v-1zm-5 0v-3h3v3zm5-5h1v1h-1zm0 7h1v1h-1zm5 2h1v3h-1v1h-3v-1h-1v-3h1v-1h3zm1-13v2h-1v1h-2V7h-1V5h1V4h2v1z"/></symbol>
 </svg>