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/i18n/translations.ts

@@ -802,9 +802,9 @@ export const translations = {
     nofxDescription5: '贡献获积分奖励）。',
     youFullControl: '你 100% 掌控',
     fullControlDesc: '完全掌控 AI 提示词和资金',
-    startupMessages1: ' 启动自动交易系统...',
-    startupMessages2: ' API服务器启动在端口 8080',
-    startupMessages3: ' Web 控制台 http://localhost:3000',
+    startupMessages1: '启动自动交易系统...',
+    startupMessages2: 'API服务器启动在端口 8080',
+    startupMessages3: 'Web 控制台 http://localhost:3000',
     
     // How It Works Section
     howToStart: '如何开始使用 NOFX',