add json formatter

index.html

@@ -382,6 +382,15 @@
           <div class="tooltip">颜色选择器</div>
         </div>
 
+        <div class="tool-item" data-tool="json">
+          <div class="tool-icon">📋</div>
+          <div class="tool-info">
+            <h3>JSON 格式化</h3>
+            <p>JSON 代码格式化、压缩和验证工具</p>
+          </div>
+          <div class="tooltip">JSON 格式化</div>
+        </div>
+
         <div class="tool-item" data-tool="other">
           <div class="tool-icon">⚙️</div>
           <div class="tool-info">
@@ -464,6 +473,10 @@
           title: "颜色选择器",
           url: "color_pick.html",
         },
+        json: {
+          title: "JSON 格式化",
+          url: "json_formatter.html",
+        },
         other: {
           title: "其他功能",
           url: "other_function.html",
@@ -536,12 +549,13 @@
         // Ctrl/Cmd + 数字键快速切换工具
         if (e.ctrlKey || e.metaKey) {
           const key = parseInt(e.key);
-          if (key >= 1 && key <= 5) {
+          if (key >= 1 && key <= 6) {
             const toolNames = [
               "welcome",
               "calculator",
               "number",
               "color",
+              "json",
               "other",
             ];
             const toolName = toolNames[key - 1];