fix readme

app/src/main/java/com/gacy/android/data/UpdateRepository.kt

@@ -43,16 +43,41 @@ class UpdateRepository(private val context: Context) {
 
     fun isServerInstalled(): Boolean {
         val ppsrFile = File(context.filesDir, "server/build/build/ppsr.pyc")
-        return ppsrFile.exists() && ppsrFile.length() > 0
+        if (!ppsrFile.exists() || ppsrFile.length() < 16) return false
+
+        // Check if build code matches current APK
+        val installedBuildCode = prefs.getInt("installed_build_code", -1)
+        if (installedBuildCode != com.gacy.android.BuildConfig.VERSION_CODE) {
+            return false
+        }
+
+        // Validate that python bytecode magic is genuine Python 3.14: [43, 14, 13, 10]
+        try {
+            ppsrFile.inputStream().use { stream ->
+                val magic = ByteArray(4)
+                if (stream.read(magic) == 4) {
+                    if (magic[0] != 43.toByte() || magic[1] != 14.toByte() || magic[2] != 13.toByte() || magic[3] != 10.toByte()) {
+                        return false // Incompatible bytecode from old install, force refresh!
+                    }
+                } else {
+                    return false
+                }
+            }
+        } catch (_: Exception) {
+            return false
+        }
+
+        return true
     }
 
-    suspend fun ensureServerInstalled(): Boolean = withContext(Dispatchers.IO) {
+    suspend fun ensureServerInstalled(force: Boolean = false): Boolean = withContext(Dispatchers.IO) {
         val ppsrFile = File(context.filesDir, "server/build/build/ppsr.pyc")
-        if (ppsrFile.exists() && ppsrFile.length() > 0) {
+        if (!force && isServerInstalled()) {
             return@withContext true
         }
 
         try {
+            com.gacy.android.CrashTracker.breadcrumb(context, "UpdateRepository: ensureServerInstalled start (force=$force)")
             val stagingDir = File(context.filesDir, "server/staging")
             val targetServerDir = File(context.filesDir, "server/build/build")
 
@@ -60,6 +85,7 @@ class UpdateRepository(private val context: Context) {
             stagingDir.mkdirs()
 
             // 1. Extract build.zip from bundled assets
+            com.gacy.android.CrashTracker.breadcrumb(context, "UpdateRepository: extracting build.zip")
             extractAssetZip("build.zip", stagingDir)
 
             val stagedBuildDir = File(stagingDir, "build")
@@ -67,12 +93,25 @@ class UpdateRepository(private val context: Context) {
 
             // 2. Extract runtime packages into effective directory
             try {
+                com.gacy.android.CrashTracker.breadcrumb(context, "UpdateRepository: extracting packages.zip")
                 extractAssetZip("packages.zip", effectiveStagedDir)
             } catch (e: Exception) {
+                com.gacy.android.CrashTracker.breadcrumb(context, "UpdateRepository: packages.zip notice: ${e.message}")
                 e.printStackTrace()
             }
 
+            // Keep the player's settings when refreshing the bundled server.
+            for (name in listOf("persistent.json", "config.json")) {
+                val existing = File(targetServerDir, "misc/$name")
+                if (existing.isFile) {
+                    val destination = File(effectiveStagedDir, "misc/$name")
+                    destination.parentFile?.mkdirs()
+                    existing.copyTo(destination, overwrite = true)
+                }
+            }
+
             // 3. Move/Rename into place
+            com.gacy.android.CrashTracker.breadcrumb(context, "UpdateRepository: moving to target directory")
             if (targetServerDir.exists()) {
                 targetServerDir.deleteRecursively()
             }
@@ -85,9 +124,16 @@ class UpdateRepository(private val context: Context) {
             }
             if (stagingDir.exists()) stagingDir.deleteRecursively()
 
-            setInstalledVersion("4.6.53-embedded")
+            prefs.edit()
+                .putInt("installed_build_code", com.gacy.android.BuildConfig.VERSION_CODE)
+                .putString(PREF_INSTALLED_VERSION, "4.6.53-embedded-py314")
+                .apply()
+
+            setInstalledVersion("4.6.53-embedded-py314")
+            com.gacy.android.CrashTracker.breadcrumb(context, "UpdateRepository: ensureServerInstalled finished success=${ppsrFile.exists()}")
             return@withContext ppsrFile.exists()
         } catch (e: Exception) {
+            com.gacy.android.CrashTracker.breadcrumb(context, "UpdateRepository: ensureServerInstalled error: ${e.message}")
             e.printStackTrace()
             return@withContext false
         }