3400e33207
The catch-all /* -> /index.html redirect was serving HTML for /og-image.png, so Signal's crawler got text/html instead of image/png. Added explicit rules for static files (og-image.png, logo.png, robots.txt, manifest.webmanifest) before the SPA fallback so they serve with correct content types. Co-authored-by: shakespeare.diy <assistant@shakespeare.diy>