fix: resolve Web UI display issues (#365)

## Fixes
### 1. Typewriter Component - Missing First Character
- Fix character loss issue where first character of each line was missing
- Add proper state reset logic before starting typing animation
- Extract character before setState to avoid closure issues
- Add setTimeout(0) to ensure state is updated before typing starts
- Change dependency from `lines` to `sanitizedLines` for correct updates
- Use `??` instead of `||` for safer null handling
### 2. Chinese Translation - Leading Spaces
- Remove leading spaces from startupMessages1/2/3 in Chinese translations
- Ensures proper display of startup messages in terminal simulation
### 3. Dynamic GitHub Stats with Animation
- Add useGitHubStats hook to fetch real-time GitHub repository data
- Add useCounterAnimation hook with easeOutExpo easing for smooth number animation
- Display dynamic star count with smooth counter animation (2s duration)
- Display dynamic days count (static, no animation)
- Support bilingual display (EN/ZH) with proper formatting
## Changes
- web/src/components/Typewriter.tsx: Fix first character loss bug
- web/src/i18n/translations.ts: Remove leading spaces in Chinese messages
- web/src/components/landing/HeroSection.tsx: Add dynamic GitHub stats
- web/src/hooks/useGitHubStats.ts: New hook for GitHub API integration
- web/src/hooks/useCounterAnimation.ts: New hook for number animations
Fixes #365
Co-Authored-By: tinkle-community <tinklefund@gmail.com>

web/src/components/Typewriter.tsx

@@ -24,13 +24,19 @@ export default function Typewriter({
   const sanitizedLines = useMemo(() => lines.map((l) => String(l ?? '')), [lines])
 
   useEffect(() => {
+    // 重置状态
+    lineIndexRef.current = 0
+    charIndexRef.current = 0
+    setTypedLines([''])
+
     function typeNext() {
       const currentLine = sanitizedLines[lineIndexRef.current] ?? ''
       if (charIndexRef.current < currentLine.length) {
+        const ch = currentLine.charAt(charIndexRef.current)
         setTypedLines((prev) => {
           const next = [...prev]
-          const ch = currentLine.charAt(charIndexRef.current)
-          next[next.length - 1] = (next[next.length - 1] || '') + ch
+          const lastIndex = next.length - 1
+          next[lastIndex] = (next[lastIndex] ?? '') + ch
           return next
         })
         charIndexRef.current += 1
@@ -49,7 +55,8 @@ export default function Typewriter({
       }
     }
 
-    typeNext()
+    // 延迟一帧开始打字,确保状态已重置
+    timerRef.current = window.setTimeout(typeNext, 0)
 
     // 光标闪烁
     blinkRef.current = window.setInterval(() => {
@@ -60,7 +67,7 @@ export default function Typewriter({
       if (timerRef.current) window.clearTimeout(timerRef.current)
       if (blinkRef.current) window.clearInterval(blinkRef.current)
     }
-  }, [lines, typingSpeed, lineDelay])
+  }, [sanitizedLines, typingSpeed, lineDelay])
 
   const displayText = useMemo(() => typedLines.join('\n').replace(/undefined/g, ''), [typedLines])
 

web/src/components/landing/HeroSection.tsx

@@ -1,6 +1,8 @@
 import { motion, useScroll, useTransform, useAnimation } from 'framer-motion'
 import { Sparkles } from 'lucide-react'
 import { t, Language } from '../../i18n/translations'
+import { useGitHubStats } from '../../hooks/useGitHubStats'
+import { useCounterAnimation } from '../../hooks/useCounterAnimation'
 
 interface HeroSectionProps {
   language: Language
@@ -11,6 +13,14 @@ export default function HeroSection({ language }: HeroSectionProps) {
   const opacity = useTransform(scrollYProgress, [0, 0.2], [1, 0])
   const scale = useTransform(scrollYProgress, [0, 0.2], [1, 0.8])
   const handControls = useAnimation()
+  const { stars, daysOld, isLoading } = useGitHubStats('NoFxAiOS', 'nofx')
+
+  // 动画数字 - 仅对 stars 添加动画
+  const animatedStars = useCounterAnimation({
+    start: 0,
+    end: stars,
+    duration: 2000,
+  })
 
   const fadeInUp = {
     initial: { opacity: 0, y: 60 },
@@ -33,7 +43,20 @@ export default function HeroSection({ language }: HeroSectionProps) {
               >
                 <Sparkles className='w-4 h-4' style={{ color: 'var(--brand-yellow)' }} />
                 <span className='text-sm font-semibold' style={{ color: 'var(--brand-yellow)' }}>
-{t('githubStarsInDays', language)}
+                  {isLoading ? (
+                    t('githubStarsInDays', language)
+                  ) : language === 'zh' ? (
+                    <>
+                      {daysOld} 天内{' '}
+                      <span className='inline-block tabular-nums'>{(animatedStars / 1000).toFixed(1)}</span>
+                      K+ GitHub Stars
+                    </>
+                  ) : (
+                    <>
+                      <span className='inline-block tabular-nums'>{(animatedStars / 1000).toFixed(1)}</span>
+                      K+ GitHub Stars in {daysOld} days
+                    </>
+                  )}
                 </span>
               </motion.div>
             </motion.div>