feat: Shell 类运行时显示 source 命令（继承环境变量）

- CommandCard 支持 primary/secondary 两种样式
- bash/zsh 使用 source <(curl URL)，sh 使用 . <(curl URL)，fish 使用 curl URL | source
- 非 Shell 类运行时（python3/node/ruby/php）不显示 source 命令

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

frontend/src/components/ResultCard.tsx

@@ -1,4 +1,4 @@
-import { CreateScriptResponse } from '../types'
+import { CreateScriptResponse, isShellRuntime, getSourceCommand } from '../types'
 import CommandCard from './CommandCard'
 
 interface Props {
@@ -8,6 +8,8 @@ interface Props {
 
 export default function ResultCard({ result, onReset }: Props) {
   const detailUrl = `${window.location.origin}/s/${result.id}`
+  const showSource = isShellRuntime(result.runtime)
+  const sourceCommand = showSource ? getSourceCommand(result.url, result.runtime) : null
 
   return (
     <div className="space-y-6">
@@ -18,6 +20,19 @@ export default function ResultCard({ result, onReset }: Props) {
 
       <CommandCard command={result.command} />
 
+      {showSource && sourceCommand && (
+        <div>
+          <p className="text-xs text-gray-500 mb-2">
+            如果脚本设置了环境变量（如代理），请使用以下命令在当前 shell 中执行：
+          </p>
+          <CommandCard
+            command={sourceCommand}
+            label="继承环境变量"
+            variant="secondary"
+          />
+        </div>
+      )}
+
       <div className="bg-gray-800/50 border border-gray-700 rounded-lg p-4 space-y-3">
         <div className="flex justify-between text-sm">
           <span className="text-gray-400">脚本 ID</span>