feat: add CI status indicator and favicon

- Add CI status badge in header (auto-syncs from Forgejo)
- Add rock-svg-icon.svg as favicon for Chrome
- Add SOPS encrypted secrets for Forgejo token
- Add decrypt script for local dev

components/Header.tsx

@@ -6,6 +6,7 @@ import { Menu, X, Moon, Sun } from 'lucide-react'
 import { useState, useEffect } from 'react'
 import { useTerminal } from '@/lib/TerminalContext'
 import { useLanguage } from '@/lib/LanguageContext'
+import { CIStatusIndicator } from './CIStatusIndicator'
 
 export default function Header() {
   const [open, setOpen] = useState(false)
@@ -226,6 +227,8 @@ export default function Header() {
             >
               {lang === 'en' ? '中文' : 'EN'}
             </button>
+            {/* CI Status */}
+            <CIStatusIndicator />
           </div>
         </nav>