refactor: update branding assets and convert settings to accordion UI

- Replace SVG favicons with PNG icons from new smeshicon assets
- Add theme-aware Icon component using smeshiconlight/dark PNGs
- Refactor Settings page to use collapsible accordion sections
- Add Radix UI accordion component with animations
- Update QrCode component to use new PNG icon
- Remove old favicon.svg and nostr.json files
- Add new logo assets in resources/ and src/assets/

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/assets/Icon.tsx

@@ -1,24 +1,10 @@
+import { useTheme } from '@/providers/ThemeProvider'
+import iconLight from './smeshiconlight.png'
+import iconDark from './smeshicondark.png'
+
 export default function Icon({ className }: { className?: string }) {
-  return (
-    <svg
-      viewBox="0 0 1080 1228"
-      version="1.1"
-      xmlns="http://www.w3.org/2000/svg"
-      xmlnsXlink="http://www.w3.org/1999/xlink"
-      xmlSpace="preserve"
-      style={{
-        fill: 'currentcolor',
-        fillRule: 'evenodd',
-        clipRule: 'evenodd',
-        strokeLinejoin: 'round',
-        strokeMiterlimit: 2
-      }}
-      className={className}
-    >
-      <path
-        id="Icon-Curve-Cut"
-        d="M360.047,1225.75c-31.046,-3.901 -75.11,-14.46 -106.756,-25.58c-101.676,-35.727 -175.164,-93.066 -215.387,-168.055c-12.079,-22.521 -30.071,-71.422 -27.297,-74.195c0.736,-0.736 11.648,5.578 24.249,14.031c135.436,90.86 301.047,169.043 465.056,219.547l32.77,10.091l-20.27,7.416c-43.455,15.896 -105.159,22.678 -152.365,16.745Zm166.293,-59.234c-168.523,-50.004 -331.475,-126.514 -481.755,-226.196c-37.737,-25.031 -41.489,-28.372 -43.419,-38.663c-3.585,-19.109 1.498,-83.894 9.798,-124.886c7.343,-36.266 27.664,-106.034 32.278,-110.818c2.023,-2.099 217.924,48.207 221.274,51.557c0.975,0.975 -1.132,11.339 -4.682,23.032c-24.542,80.842 -27.217,127.586 -9.935,173.593c22.507,59.917 114.521,99.888 177.281,77.012c29.23,-10.654 56.593,-41.085 82.629,-91.894c29.288,-57.155 32.348,-64.988 196.483,-503.076c81.138,-216.562 148.499,-394.821 149.692,-396.131c2.1,-2.304 217.949,76.926 223.076,81.884c2.056,1.988 -262.476,712.505 -307.806,826.747c-18.422,46.426 -56.939,123.045 -77.918,154.993c-10.157,15.469 -30.753,40.901 -45.769,56.515c-27.821,28.93 -66.46,58.952 -75.447,58.621c-2.738,-0.106 -23.339,-5.631 -45.78,-12.29Z"
-      />
-    </svg>
-  )
+  const { theme } = useTheme()
+  const iconSrc = theme === 'light' ? iconLight : iconDark
+
+  return <img src={iconSrc} alt="Smesh" className={className} />
 }