feat: 导航收藏网站 v1.0

功能:
- 网站收藏管理（添加/编辑/删除/收藏）
- 分类管理（支持自定义图标和颜色）
- 搜索功能
- 点击统计
- 现代暗色主题 UI

技术栈:
- 后端: Python Flask + MySQL
- 前端: React + Vite + Tailwind CSS
- 数据库: MySQL (192.168.8.160)
- 端口: 后端 5003, 前端 5173

frontend/node_modules/tailwindcss/lib/util/removeAlphaVariables.js

@@ -0,0 +1,33 @@
+/**
+ * This function removes any uses of CSS variables used as an alpha channel
+ *
+ * This is required for selectors like `:visited` which do not allow
+ * changes in opacity or external control using CSS variables.
+ *
+ * @param {import('postcss').Container} container
+ * @param {string[]} toRemove
+ */ "use strict";
+Object.defineProperty(exports, "__esModule", {
+    value: true
+});
+Object.defineProperty(exports, "removeAlphaVariables", {
+    enumerable: true,
+    get: function() {
+        return removeAlphaVariables;
+    }
+});
+function removeAlphaVariables(container, toRemove) {
+    container.walkDecls((decl)=>{
+        if (toRemove.includes(decl.prop)) {
+            decl.remove();
+            return;
+        }
+        for (let varName of toRemove){
+            if (decl.value.includes(`/ var(${varName})`)) {
+                decl.value = decl.value.replace(`/ var(${varName})`, "");
+            } else if (decl.value.includes(`/ var(${varName}, 1)`)) {
+                decl.value = decl.value.replace(`/ var(${varName}, 1)`, "");
+            }
+        }
+    });
+}