fix: dropdowns close on click-outside instead of hover-away

components/Header.tsx

@@ -3,7 +3,7 @@
 import Link from 'next/link'
 import Image from 'next/image'
 import { Menu, X } from 'lucide-react'
-import { useState } from 'react'
+import { useState, useEffect, useRef } from 'react'
 import { useTerminal } from '@/lib/TerminalContext'
 import { useLanguage } from '@/lib/LanguageContext'
 import { CIStatusIndicator } from './CIStatusIndicator'
@@ -28,7 +28,19 @@ export default function Header() {
     setLang(lang === 'en' ? 'zh' : 'en')
   }
 
+  const skillsRef = useRef<HTMLDivElement>(null)
+  const contactRef = useRef<HTMLDivElement>(null)
+  const educationRef = useRef<HTMLDivElement>(null)
 
+  useEffect(() => {
+    const handleClickOutside = (e: MouseEvent) => {
+      if (skillsRef.current && !skillsRef.current.contains(e.target as Node)) setSkillsOpen(false)
+      if (contactRef.current && !contactRef.current.contains(e.target as Node)) setContactOpen(false)
+      if (educationRef.current && !educationRef.current.contains(e.target as Node)) setEducationOpen(false)
+    }
+    document.addEventListener('mousedown', handleClickOutside)
+    return () => document.removeEventListener('mousedown', handleClickOutside)
+  }, [])
 
   return (
     <header className="sticky top-0 z-50 border-b border-gray-200 dark:border-gray-800 bg-white/95 dark:bg-gray-950/95 backdrop-blur">
@@ -55,7 +67,7 @@ export default function Header() {
           >
             {t.header.nav.askPoimen}
           </button>
-          <div className="relative" onMouseLeave={() => setSkillsOpen(false)}>
+          <div className="relative" ref={skillsRef}>
             <button 
               onClick={() => setSkillsOpen(!skillsOpen)}
               className="text-sm hover:text-blue-600 dark:hover:text-blue-400"
@@ -83,7 +95,7 @@ export default function Header() {
                 </div>
             )}
           </div>
-          <div className="relative" onMouseLeave={() => setContactOpen(false)}>
+          <div className="relative" ref={contactRef}>
             <button 
               onClick={() => setContactOpen(!contactOpen)}
               className="text-sm hover:text-blue-600 dark:hover:text-blue-400"
@@ -173,7 +185,7 @@ export default function Header() {
               <div className="text-gray-600 dark:text-gray-400">{t.header.experience}</div>
               <div className="font-semibold text-gray-900 dark:text-white">{t.header.experienceValue}</div>
             </div>
-            <div className="relative" onMouseLeave={() => setEducationOpen(false)}>
+            <div className="relative" ref={educationRef}>
               <button 
                 onClick={() => setEducationOpen(!educationOpen)}
                 className="text-xs cursor-pointer hover:text-blue-600 dark:hover:text-blue-400"