fix: improve mobile responsive layout for header and comparison chart

This is a partial fix for issue #311 mobile display problems.
Changes in this commit:
- Add responsive header layout with separate mobile/desktop views in App.tsx
- Fix language selector visibility on mobile (no longer hidden by menu)
- Add responsive breakpoints to ComparisonChart stats grid (2 cols on mobile, 4 on desktop)
- Adjust padding and text sizes for mobile screens
- Preserve all i18n (internationalization) functionality from upstream
Note: Additional components (CompetitionPage, AITradersPage) will need similar mobile
responsive improvements in follow-up commits.
Related to #311
Co-Authored-By: tinkle-community <tinklefund@gmail.com>

web/src/App.tsx

@@ -194,8 +194,9 @@ function App() {
     <div className="min-h-screen" style={{ background: '#0B0E11', color: '#EAECEF' }}>
       {/* Header - Binance Style */}
       <header className="glass sticky top-0 z-50 backdrop-blur-xl">
-        <div className="max-w-[1920px] mx-auto px-6 py-4">
-          <div className="relative flex items-center">
+        <div className="max-w-[1920px] mx-auto px-3 md:px-6 py-4">
+          {/* Desktop Layout */}
+          <div className="hidden md:flex relative items-center">
             {/* Left - Logo and Title */}
             <div className="flex items-center gap-3">
               <div className="w-8 h-8 flex items-center justify-center">
@@ -210,7 +211,7 @@ function App() {
                 </p>
               </div>
             </div>
-            
+
             {/* Center - Page Toggle (absolutely positioned) */}
             <div className="absolute left-1/2 transform -translate-x-1/2 flex gap-1 rounded p-1" style={{ background: '#1E2329' }}>
               <button
@@ -244,7 +245,7 @@ function App() {
                 {t('tradingPanel', language)}
               </button>
             </div>
-            
+
             {/* Right - Actions */}
             <div className="ml-auto flex items-center gap-3">
 
@@ -257,7 +258,7 @@ function App() {
                   <span className="text-sm" style={{ color: '#EAECEF' }}>{user.email}</span>
                 </div>
               )}
-              
+
               {/* Admin Mode Indicator */}
               {systemConfig?.admin_mode && (
                 <div className="flex items-center gap-2 px-3 py-2 rounded" style={{ background: '#1E2329', border: '1px solid #2B3139' }}>
@@ -302,11 +303,118 @@ function App() {
               )}
             </div>
           </div>
+
+          {/* Mobile Layout */}
+          <div className="flex md:hidden flex-col gap-3">
+            {/* Top Row - Logo, Title and Language */}
+            <div className="flex items-center justify-between">
+              <div className="flex items-center gap-2">
+                <img src="/icons/nofx.svg?v=2" alt="NOFX" className="w-7 h-7" />
+                <div>
+                  <h1 className="text-base font-bold" style={{ color: '#EAECEF' }}>
+                    {t('appTitle', language)}
+                  </h1>
+                  <p className="text-xs mono" style={{ color: '#848E9C' }}>
+                    {t('subtitle', language)}
+                  </p>
+                </div>
+              </div>
+
+              {/* Language Toggle - Right side on mobile */}
+              <div className="flex gap-1 rounded p-0.5" style={{ background: '#1E2329' }}>
+                <button
+                  onClick={() => setLanguage('zh')}
+                  className="px-2 py-1 rounded text-xs font-semibold transition-all"
+                  style={language === 'zh'
+                    ? { background: '#F0B90B', color: '#000' }
+                    : { background: 'transparent', color: '#848E9C' }
+                  }
+                >
+                  中文
+                </button>
+                <button
+                  onClick={() => setLanguage('en')}
+                  className="px-2 py-1 rounded text-xs font-semibold transition-all"
+                  style={language === 'en'
+                    ? { background: '#F0B90B', color: '#000' }
+                    : { background: 'transparent', color: '#848E9C' }
+                  }
+                >
+                  EN
+                </button>
+              </div>
+            </div>
+
+            {/* Second Row - Page Toggle */}
+            <div className="flex gap-1 rounded p-1" style={{ background: '#1E2329' }}>
+              <button
+                onClick={() => setCurrentPage('competition')}
+                className={`flex-1 px-2 py-1.5 rounded text-xs font-semibold transition-all`}
+                style={currentPage === 'competition'
+                  ? { background: '#F0B90B', color: '#000' }
+                  : { background: 'transparent', color: '#848E9C' }
+                }
+              >
+                {t('aiCompetition', language)}
+              </button>
+              <button
+                onClick={() => setCurrentPage('traders')}
+                className={`flex-1 px-2 py-1.5 rounded text-xs font-semibold transition-all`}
+                style={currentPage === 'traders'
+                  ? { background: '#F0B90B', color: '#000' }
+                  : { background: 'transparent', color: '#848E9C' }
+                }
+              >
+                {t('aiTraders', language)}
+              </button>
+              <button
+                onClick={() => setCurrentPage('trader')}
+                className={`flex-1 px-2 py-1.5 rounded text-xs font-semibold transition-all`}
+                style={currentPage === 'trader'
+                  ? { background: '#F0B90B', color: '#000' }
+                  : { background: 'transparent', color: '#848E9C' }
+                }
+              >
+                {t('tradingPanel', language)}
+              </button>
+            </div>
+
+            {/* Third Row - User Info and Logout */}
+            <div className="flex items-center gap-2">
+              {/* User Info or Admin Mode */}
+              {!systemConfig?.admin_mode && user && (
+                <div className="flex-1 flex items-center gap-2 px-2 py-1.5 rounded" style={{ background: '#1E2329', border: '1px solid #2B3139' }}>
+                  <div className="w-5 h-5 rounded-full flex items-center justify-center text-xs font-bold" style={{ background: '#F0B90B', color: '#000' }}>
+                    {user.email[0].toUpperCase()}
+                  </div>
+                  <span className="text-xs truncate" style={{ color: '#EAECEF' }}>{user.email}</span>
+                </div>
+              )}
+
+              {systemConfig?.admin_mode && (
+                <div className="flex-1 flex items-center gap-2 px-2 py-1.5 rounded" style={{ background: '#1E2329', border: '1px solid #2B3139' }}>
+                  <Zap className="w-4 h-4" style={{ color: '#F0B90B' }} />
+                  <span className="text-xs font-semibold" style={{ color: '#F0B90B' }}>{t('adminMode', language)}</span>
+                </div>
+              )}
+
+              {/* Logout Button */}
+              {!systemConfig?.admin_mode && (
+                <button
+                  onClick={logout}
+                  className="px-3 py-1.5 rounded text-xs font-semibold transition-all"
+                  style={{ background: 'rgba(246, 70, 93, 0.1)', color: '#F6465D', border: '1px solid rgba(246, 70, 93, 0.2)' }}
+                >
+                  {t('logout', language)}
+                </button>
+              )}
+            </div>
+          </div>
         </div>
       </header>
 
       {/* Main Content */}
-      <main className="max-w-[1920px] mx-auto px-6 py-6">
+      <main className="max-w-[1920px] mx-auto px-3 md:px-6 py-4 md:py-6">
         {currentPage === 'competition' ? (
           <CompetitionPage />
         ) : currentPage === 'traders' ? (

web/src/components/ComparisonChart.tsx

@@ -313,24 +313,24 @@ export function ComparisonChart({ traders }: ComparisonChartProps) {
       </div>
 
       {/* Stats */}
-      <div className="mt-6 grid grid-cols-4 gap-4 pt-5" style={{ borderTop: '1px solid #2B3139' }}>
-        <div className="p-3 rounded transition-all hover:bg-opacity-50" style={{ background: 'rgba(240, 185, 11, 0.05)' }}>
+      <div className="mt-6 grid grid-cols-2 md:grid-cols-4 gap-3 md:gap-4 pt-5" style={{ borderTop: '1px solid #2B3139' }}>
+        <div className="p-2 md:p-3 rounded transition-all hover:bg-opacity-50" style={{ background: 'rgba(240, 185, 11, 0.05)' }}>
           <div className="text-xs mb-1 uppercase tracking-wider" style={{ color: '#848E9C' }}>{t('comparisonMode', language)}</div>
-          <div className="text-base font-bold" style={{ color: '#EAECEF' }}>PnL %</div>
+          <div className="text-sm md:text-base font-bold" style={{ color: '#EAECEF' }}>PnL %</div>
         </div>
-        <div className="p-3 rounded transition-all hover:bg-opacity-50" style={{ background: 'rgba(240, 185, 11, 0.05)' }}>
+        <div className="p-2 md:p-3 rounded transition-all hover:bg-opacity-50" style={{ background: 'rgba(240, 185, 11, 0.05)' }}>
           <div className="text-xs mb-1 uppercase tracking-wider" style={{ color: '#848E9C' }}>{t('dataPoints', language)}</div>
-          <div className="text-base font-bold mono" style={{ color: '#EAECEF' }}>{t('count', language, {count: combinedData.length})}</div>
+          <div className="text-sm md:text-base font-bold mono" style={{ color: '#EAECEF' }}>{t('count', language, {count: combinedData.length})}</div>
         </div>
-        <div className="p-3 rounded transition-all hover:bg-opacity-50" style={{ background: 'rgba(240, 185, 11, 0.05)' }}>
+        <div className="p-2 md:p-3 rounded transition-all hover:bg-opacity-50" style={{ background: 'rgba(240, 185, 11, 0.05)' }}>
           <div className="text-xs mb-1 uppercase tracking-wider" style={{ color: '#848E9C' }}>{t('currentGap', language)}</div>
-          <div className="text-base font-bold mono" style={{ color: currentGap > 1 ? '#F0B90B' : '#EAECEF' }}>
+          <div className="text-sm md:text-base font-bold mono" style={{ color: currentGap > 1 ? '#F0B90B' : '#EAECEF' }}>
             {currentGap.toFixed(2)}%
           </div>
         </div>
-        <div className="p-3 rounded transition-all hover:bg-opacity-50" style={{ background: 'rgba(240, 185, 11, 0.05)' }}>
+        <div className="p-2 md:p-3 rounded transition-all hover:bg-opacity-50" style={{ background: 'rgba(240, 185, 11, 0.05)' }}>
           <div className="text-xs mb-1 uppercase tracking-wider" style={{ color: '#848E9C' }}>{t('displayRange', language)}</div>
-          <div className="text-base font-bold mono" style={{ color: '#EAECEF' }}>
+          <div className="text-sm md:text-base font-bold mono" style={{ color: '#EAECEF' }}>
             {combinedData.length > MAX_DISPLAY_POINTS
               ? `${t('recent', language)} ${MAX_DISPLAY_POINTS}`
               : t('allData', language)}