feat: complete hosted mod sync and launcher interface updates

Add pack sync markers, tagged mod updates, parallel progress, JWT downloads and retry recovery. Include pending onboarding, about scene, compatibility data pack and download fixes.

packages/app-lib/java/build.gradle.kts

@@ -63,6 +63,13 @@ val authlibInjector by tasks.registering {
     outputs.file(output)
 
     doLast {
+        val cached = output.get().asFile
+        if (cached.isFile) {
+            val checksum = MessageDigest.getInstance("SHA-256")
+                .digest(cached.readBytes())
+                .joinToString("") { "%02x".format(it) }
+            if (checksum == inputs.properties["sha256"]) return@doLast
+        }
         val bytes = uri(
             "https://authlib-injector.yushi.moe/artifact/56/authlib-injector-1.2.8.jar",
         ).toURL().readBytes()