refactor: replace sveltekit-og with native Satori implementation

- Remove @ethercorps/sveltekit-og and bits-ui dependencies
- Implement direct Satori + Resvg rendering pipeline
- Add OgImage.svelte component for template generation
- Create /internal/ogp preview page for development
- Load fonts from node_modules via fs for production compatibility
- Add 2s startup delay before OG image regeneration

web/svelte.config.js

@@ -8,7 +8,11 @@ const config = {
   kit: {
     adapter: adapter({
       out: "build",
-      precompress: false,
+      precompress: {
+        brotli: true,
+        gzip: true,
+        files: ["html", "js", "json", "css", "svg", "xml", "wasm"],
+      },
       serveAssets: false,
     }),
     alias: {