Refactor asset handling and authentication logic (for node)

Updated asset path configuration and server-side logic to standardize asset serving. Introduced `shouldSkipAuth` to bypass authentication for asset requests. Added test coverage for the new asset path handling logic.

app/build.ts

@@ -58,7 +58,7 @@ const result = await esbuild.build({
    sourcemap,
    entryPoints: ["src/ui/main.tsx"],
    entryNames: "[dir]/[name]-[hash]",
-   outdir: "dist/static",
+   outdir: "dist/static/assets",
    platform: "browser",
    bundle: true,
    splitting: true,
@@ -224,4 +224,4 @@ await tsup.build({
 
 await tsup.build({
    ...baseConfig("astro")
-});
+});