feat: md-table weighted random

src/components/md-table.tsx

@@ -3,6 +3,7 @@ import { createSignal, For, Show, createEffect, createMemo, createResource } fro
 import { marked } from '../markdown';
 import { loadCSV, CSV, processVariables, isCSV } from './utils/csv-loader';
 import { resolvePath } from './utils/path';
+import { areAllLabelsNumeric, weightedRandomIndex } from './utils/weighted-random';
 
 export interface TableProps {
   roll?: boolean;
@@ -108,8 +109,23 @@ customElement('md-table', { roll: false, remix: false }, (props, { element }) =>
 
   // 随机切换 tab
   const handleRoll = () => {
-    const randomIndex = Math.floor(Math.random() * filteredRows().length);
-    setActiveTab(randomIndex);
+    const filtered = filteredRows();
+    if (filtered.length === 0) return;
+    
+    // 检查所有 label 是否都是整数/整数范围格式
+    const labels = filtered.map(row => row.label);
+    if (areAllLabelsNumeric(labels)) {
+      // 使用加权随机
+      const randomIndex = weightedRandomIndex(labels);
+      if (randomIndex !== -1) {
+        setActiveTab(randomIndex);
+      }
+    } else {
+      // 使用简单随机
+      const randomIndex = Math.floor(Math.random() * filtered.length);
+      setActiveTab(randomIndex);
+    }
+    
     // 滚动到可视区域
     setTimeout(() => {
       const activeButton = tabsContainer?.querySelector('.border-blue-600');