ForgeFix и новые фичи в интерфейсе

launcher/bootstrap/src/main/java/me/sashegdev/zernmc/launcher/Bootstrap.java

@@ -210,6 +210,10 @@ public class Bootstrap {
         if (ui != null) ui.setProgress(current, total);
     }
 
+    private static void setSpeedText(String text) {
+        if (ui != null) ui.setSpeedText(text);
+    }
+
     private static void setVersionInfo(String localVer, String serverVer) {
         if (ui != null) ui.setVersionInfo(localVer, serverVer);
     }
@@ -467,13 +471,25 @@ public class Bootstrap {
                 
                 if (downloaded - lastUpdate > 1024 || downloaded == expectedSize) {
                     long elapsed = System.currentTimeMillis() - startTime;
-                    double speed = downloaded / 1024.0 / 1024.0 / (elapsed / 1000.0 + 0.001);
+                    double speedBps = elapsed > 0 ? downloaded * 1000.0 / elapsed : 0;
+                    double speed = speedBps / 1024.0 / 1024.0;
                     double downloadedMB = downloaded / 1024.0 / 1024.0;
                     double totalMB = expectedSize / 1024.0 / 1024.0;
-                    
-                    String progressStr = String.format("%.1f/%.1f MB (%.1f MB/s)", downloadedMB, totalMB, speed);
+                    String etaStr = "";
+                    if (speedBps > 0) {
+                        long etaSec = (long)((expectedSize - downloaded) / speedBps);
+                        if (etaSec > 3600) {
+                            etaStr = String.format(" ETA: %dh %dm", etaSec / 3600, (etaSec % 3600) / 60);
+                        } else if (etaSec > 60) {
+                            etaStr = String.format(" ETA: %dm %ds", etaSec / 60, etaSec % 60);
+                        } else if (etaSec > 0) {
+                            etaStr = " ETA: " + etaSec + "s";
+                        }
+                    }
+                    String progressStr = String.format("%.1f/%.1f MB (%.1f MB/s%s)", downloadedMB, totalMB, speed, etaStr);
                     log(progressStr);
                     setProgress((int) downloaded, (int) Math.max(expectedSize, 1));
+                    setSpeedText(String.format("%.1f / %.1f MB \u2022 %.1f MB/s", downloadedMB, totalMB, speed));
                     lastUpdate = downloaded;
                 }
             }
@@ -698,14 +714,16 @@ public class Bootstrap {
                 if (total > 0) {
                     int pct = (int) ((long) current * 100 / total);
                     progressBar.setValue(Math.min(pct, 100));
-                    speedLabel.setText(String.format("%.1f / %.1f MB", 
-                        current / 1024.0 / 1024.0, total / 1024.0 / 1024.0));
                 } else {
                     progressBar.setIndeterminate(true);
                 }
             });
         }
 
+        void setSpeedText(final String text) {
+            SwingUtilities.invokeLater(() -> speedLabel.setText(text));
+        }
+
         void setVersionInfo(final String local, final String server) {
             SwingUtilities.invokeLater(() -> 
                 versionLabel.setText("v" + local + " \u2192 v" + server));

launcher/launcher/pom.xml

@@ -61,31 +61,31 @@
         <dependency>
             <groupId>org.openjfx</groupId>
             <artifactId>javafx-controls</artifactId>
-            <version>21</version>
+            <version>23</version>
             <classifier>win</classifier>
         </dependency>
         <dependency>
             <groupId>org.openjfx</groupId>
             <artifactId>javafx-web</artifactId>
-            <version>21</version>
+            <version>23</version>
             <classifier>win</classifier>
         </dependency>
         <dependency>
             <groupId>org.openjfx</groupId>
             <artifactId>javafx-graphics</artifactId>
-            <version>21</version>
+            <version>23</version>
             <classifier>win</classifier>
         </dependency>
         <dependency>
             <groupId>org.openjfx</groupId>
             <artifactId>javafx-base</artifactId>
-            <version>21</version>
+            <version>23</version>
             <classifier>win</classifier>
         </dependency>
         <dependency>
             <groupId>org.openjfx</groupId>
             <artifactId>javafx-media</artifactId>
-            <version>21</version>
+            <version>23</version>
             <classifier>win</classifier>
         </dependency>
         
@@ -226,27 +226,27 @@
                                 <!-- Копируем JavaFX модули в lib/javafx -->
                                 <mkdir dir="../../server/builds/lib/javafx"/>
                                 <copy todir="../../server/builds/lib/javafx" overwrite="true">
-                                    <fileset dir="${user.home}/.m2/repository/org/openjfx/javafx-controls/21">
+                                    <fileset dir="${user.home}/.m2/repository/org/openjfx/javafx-controls/23">
                                         <include name="*win.jar"/>
                                     </fileset>
                                 </copy>
                                 <copy todir="../../server/builds/lib/javafx" overwrite="true">
-                                    <fileset dir="${user.home}/.m2/repository/org/openjfx/javafx-graphics/21">
+                                    <fileset dir="${user.home}/.m2/repository/org/openjfx/javafx-graphics/23">
                                         <include name="*win.jar"/>
                                     </fileset>
                                 </copy>
                                 <copy todir="../../server/builds/lib/javafx" overwrite="true">
-                                    <fileset dir="${user.home}/.m2/repository/org/openjfx/javafx-base/21">
+                                    <fileset dir="${user.home}/.m2/repository/org/openjfx/javafx-base/23">
                                         <include name="*win.jar"/>
                                     </fileset>
                                 </copy>
                                 <copy todir="../../server/builds/lib/javafx" overwrite="true">
-                                    <fileset dir="${user.home}/.m2/repository/org/openjfx/javafx-web/21">
+                                    <fileset dir="${user.home}/.m2/repository/org/openjfx/javafx-web/23">
                                         <include name="*win.jar"/>
                                     </fileset>
                                 </copy>
                                 <copy todir="../../server/builds/lib/javafx" overwrite="true">
-                                    <fileset dir="${user.home}/.m2/repository/org/openjfx/javafx-media/21">
+                                    <fileset dir="${user.home}/.m2/repository/org/openjfx/javafx-media/23">
                                         <include name="*win.jar"/>
                                     </fileset>
                                 </copy>

launcher/launcher/src/main/java/sashegdev/zernmc/launcher/Main.java

@@ -96,41 +96,7 @@ public class Main {
     }
 
     private static void mainLoop() throws Exception {
-        if (Config.isZernMCBuild()) {
-            zernMCFlow();
-        } else {
-            globalFlow();
-        }
-    }
-
-    private static void zernMCFlow() throws Exception {
-        ConsoleUtils.clearScreen();
-        System.out.println(ZAnsi.header("=== ZernMC Private Launcher ==="));
-
-        System.out.println(ZAnsi.cyan("Checking connection to ZernMC server..."));
-        try {
-            String response = ZHttpClient.get("/health");
-            System.out.println(ZAnsi.brightGreen("✓ Server is available"));
-        } catch (Exception e) {
-            System.out.println(ZAnsi.brightRed("✗ Could not connect to ZernMC server"));
-            System.out.println(ZAnsi.white("Error: " + e.getMessage()));
-            ConsoleUtils.pause();
-            System.exit(1);
-        }
-
-        boolean sessionRestored = AuthManager.loadSavedSession();
-        if (!sessionRestored) {
-            LoginMenu loginMenu = new LoginMenu();
-            boolean loggedIn = loginMenu.show();
-            if (!loggedIn) {
-                System.exit(0);
-            }
-        } else {
-            System.out.println(ZAnsi.brightGreen("Welcome back, " + AuthManager.getUsername() + "!"));
-        }
-
-        LaunchMenu launchMenu = new LaunchMenu();
-        launchMenu.show();
+        globalFlow();
     }
 
     private static void globalFlow() throws Exception {

launcher/launcher/src/main/java/sashegdev/zernmc/launcher/menu/LaunchMenu.java

@@ -26,51 +26,7 @@ import java.util.stream.Collectors;
 public class LaunchMenu {
 
     public void show() throws Exception {
-        if (Config.isZernMCBuild()) {
-            showZernMCOnly();
-        } else {
-            showGlobal();
-        }
-    }
-
-    private void showZernMCOnly() throws Exception {
-        while (true) {
-            ConsoleUtils.clearScreen();
-            System.out.println(ZAnsi.header("=== ZernMC Private Launcher ==="));
-            System.out.println(ZAnsi.cyan("Server packs only"));
-
-            if (!awaitActivePass()) {
-                return;
-            }
-
-            PackDownloader tempDownloader = new PackDownloader(null);
-            List<ServerPack> availablePacks = tempDownloader.getAvailablePacks();
-
-            if (availablePacks.isEmpty()) {
-                System.out.println(ZAnsi.yellow("No packs available on the server."));
-                ConsoleUtils.pause();
-                return;
-            }
-
-            List<String> options = availablePacks.stream()
-                    .map(p -> String.format("%s [%s + %s v%d] - %d files",
-                            p.getName(),
-                            p.getMinecraftVersion(),
-                            p.getLoaderType(),
-                            p.getVersion(),
-                            p.getFilesCount()))
-                    .collect(Collectors.toList());
-
-            options.add("Back to main menu");
-
-            ArrowMenu menu = new ArrowMenu("Select a pack", options);
-            int choice = menu.show();
-
-            if (choice == -1 || choice == options.size() - 1) return;
-
-            ServerPack selected = availablePacks.get(choice);
-            installAndRunServerPack(selected);
-        }
+        showGlobal();
     }
 
     private boolean awaitActivePass() throws Exception {
@@ -130,43 +86,6 @@ public class LaunchMenu {
         }
     }
 
-    private void installAndRunServerPack(ServerPack selected) throws Exception {
-        ConsoleUtils.clearScreen();
-        System.out.println(ZAnsi.header("Installing pack: " + selected.getName()));
-
-        System.out.println(ZAnsi.white(" Minecraft: ") + selected.getMinecraftVersion());
-        System.out.println(ZAnsi.white(" Loader: ") + selected.getLoaderType() +
-                (selected.getLoaderVersion() != null ? " " + selected.getLoaderVersion() : ""));
-        System.out.println(ZAnsi.white(" Version: v") + selected.getVersion());
-        System.out.println(ZAnsi.white(" Files: ") + selected.getFilesCount());
-
-        String localName = askPackName();
-        if (localName == null) return;
-
-        if (InstanceManager.getInstance(localName) != null) {
-            System.out.println(ZAnsi.brightRed("A pack with this name already exists!"));
-            ConsoleUtils.pause();
-            return;
-        }
-
-        InstanceManager.createInstanceFolder(localName);
-        Instance newInstance = InstanceManager.getInstance(localName);
-
-        PackDownloader packDownloader = new PackDownloader(newInstance);
-        boolean success = packDownloader.installOrUpdatePack(selected.getName(), selected);
-
-        if (!success) {
-            System.out.println(ZAnsi.brightRed("\n[FAIL] Could not install the pack."));
-            ConsoleUtils.pause();
-            return;
-        }
-
-        System.out.println(ZAnsi.brightGreen("\n[OK] Pack '" + localName + "' installed successfully!"));
-        ConsoleUtils.pause();
-
-        launchExistingInstance(newInstance);
-    }
-
     private void showGlobal() throws Exception {
         while (true) {
             ConsoleUtils.clearScreen();

launcher/launcher/src/main/java/sashegdev/zernmc/launcher/minecraft/Instance.java

@@ -21,6 +21,7 @@ public class Instance {
     private int serverVersion;          // версия сборки на сервере
     private String serverPackName;      // имя пака на сервере
     private String fabricVersionId;
+    private String presetId;
 
     private static final Gson GSON = new GsonBuilder().setPrettyPrinting().create();
 
@@ -88,6 +89,15 @@ public class Instance {
         saveMetadata();
     }
 
+    public String getPresetId() {
+        return presetId;
+    }
+
+    public void setPresetId(String presetId) {
+        this.presetId = presetId;
+        saveMetadata();
+    }
+
     public String getServerPackName() { 
         return serverPackName; 
     }
@@ -130,6 +140,7 @@ public class Instance {
             this.isServerPack = meta.isServerPack;
             this.serverVersion = meta.serverVersion;
             this.serverPackName = meta.serverPackName;
+            this.presetId = meta.presetId;
         } catch (Exception e) {
             System.err.println("[Instance] Failed to load metadata for " + name + ": " + e.getMessage());
         }
@@ -139,7 +150,7 @@ public class Instance {
         Path metaFile = path.resolve("instance.json");
         InstanceMeta meta = new InstanceMeta(
             minecraftVersion, loaderType, loaderVersion, assetIndex,
-            isServerPack, serverVersion, serverPackName
+            isServerPack, serverVersion, serverPackName, presetId
         );
         try {
             Files.writeString(metaFile, GSON.toJson(meta));
@@ -156,12 +167,13 @@ public class Instance {
         boolean isServerPack = false;
         int serverVersion = 0;
         String serverPackName;
+        String presetId;
 
         
         public InstanceMeta(String minecraftVersion, String loaderType,
                             String loaderVersion, String assetIndex,
                             boolean isServerPack, int serverVersion, 
-                            String serverPackName) {
+                            String serverPackName, String presetId) {
             this.minecraftVersion = minecraftVersion;
             this.loaderType = loaderType;
             this.loaderVersion = loaderVersion;
@@ -169,6 +181,7 @@ public class Instance {
             this.isServerPack = isServerPack;
             this.serverVersion = serverVersion;
             this.serverPackName = serverPackName;
+            this.presetId = presetId;
         }
     }
 }

launcher/launcher/src/main/java/sashegdev/zernmc/launcher/minecraft/MinecraftLib.java

@@ -18,6 +18,8 @@ import java.io.InputStreamReader;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.List;
+import java.util.zip.ZipException;
+import java.util.zip.ZipFile;
 
 public class MinecraftLib {
 
@@ -110,6 +112,7 @@ public class MinecraftLib {
     public void launch(LaunchOptions options) throws Exception {
         System.out.println(ZAnsi.brightGreen("Launching pack: " + instance.getName()));
         cleanupOldLoaders();
+        validateJarFiles();
 
         LaunchCommandBuilder builder = new LaunchCommandBuilder(instance);
         List<String> command = builder.build(options);
@@ -224,6 +227,40 @@ public class MinecraftLib {
 
 
 
+    private void validateJarFiles() {
+        Path[] dirs = {
+            instance.getPath().resolve("mods"),
+            instance.getPath().resolve("libraries")
+        };
+        for (Path dir : dirs) {
+            if (!Files.exists(dir)) continue;
+            try (var stream = Files.walk(dir)) {
+                stream.filter(p -> p.toString().endsWith(".jar"))
+                      .filter(p -> !isValidJar(p))
+                      .forEach(p -> {
+                          try {
+                              System.out.println(ZAnsi.yellow("  Removing corrupt JAR: " + instance.getPath().relativize(p)));
+                              Files.delete(p);
+                          } catch (IOException e) {
+                              System.out.println(ZAnsi.red("  Failed to delete: " + p.getFileName()));
+                          }
+                      });
+            } catch (Exception e) {
+                System.out.println(ZAnsi.yellow("  Error scanning for corrupt JARs: " + e.getMessage()));
+            }
+        }
+    }
+
+    private boolean isValidJar(Path path) {
+        try (ZipFile zf = new ZipFile(path.toFile())) {
+            return true;
+        } catch (ZipException e) {
+            return false;
+        } catch (IOException e) {
+            return false;
+        }
+    }
+
     public Instance getInstance() {
         return instance;
     }

launcher/launcher/src/main/java/sashegdev/zernmc/launcher/minecraft/PackDownloader.java

@@ -14,17 +14,15 @@ import me.sashegdev.zernmc.launcher.utils.ZAnsi;
 import me.sashegdev.zernmc.launcher.utils.ZHttpClient;
 
 import java.io.*;
-import java.net.http.HttpClient;
-import java.net.http.HttpRequest;
-import java.net.http.HttpResponse;
 import java.nio.file.Files;
 import java.nio.file.Path;
+import java.nio.file.StandardCopyOption;
 import java.security.MessageDigest;
-import java.time.Duration;
 import java.time.LocalDateTime;
 import java.time.format.DateTimeFormatter;
 import java.util.*;
 import java.util.concurrent.atomic.AtomicInteger;
+import java.util.concurrent.atomic.AtomicLong;
 
 public class PackDownloader {
 
@@ -33,9 +31,10 @@ public class PackDownloader {
         void onProgress(String label, int percent, String stageName, int stageIndex, int stageCount);
     }
 
+    private static final String USER_FILES_FILE = ".user-files.json";
+
     private final Instance instance;
     private final Gson gson = new GsonBuilder().setPrettyPrinting().create();
-    private final HttpClient httpClient = HttpClient.newHttpClient();
     private ProgressCallback progressCallback;
     //private static final DateTimeFormatter DATE_FORMATTER = DateTimeFormatter.ISO_LOCAL_DATE_TIME;
 
@@ -157,65 +156,89 @@ public class PackDownloader {
      * Install or update a pack from the server
      */
     public boolean installOrUpdatePack(String packName, ServerPack serverPack) throws Exception {
-        LauncherLogger.info("Installing pack " + packName + " from server...");
+        return installOrUpdatePack(packName, serverPack, null);
+    }
+
+    public boolean installOrUpdatePack(String packName, ServerPack serverPack, String preset) throws Exception {
+        LauncherLogger.info("installOrUpdatePack: START packName=" + packName + " mc=" + serverPack.getMinecraftVersion() + " loader=" + serverPack.getLoaderType() + " preset=" + (preset != null ? preset : "none"));
         reportProgress("Fetching manifest...", 0, "manifest", 0, 5);
         
         // 1. Get manifest
         PackManifest manifest = getPackManifest(packName);
+        LauncherLogger.info("installOrUpdatePack: manifest loaded version=" + manifest.getVersion() + " mc=" + manifest.getMinecraftVersion() + " loader=" + manifest.getLoaderType() + " files=" + (manifest.files == null ? "null" : manifest.files.size()));
         
         // 2. First install Minecraft + Loader via MinecraftLib
         MinecraftLib lib = new MinecraftLib(instance);
         
-        System.out.println(ZAnsi.cyan("Installing Minecraft " + manifest.getMinecraftVersion() + "..."));
+        LauncherLogger.info("installOrUpdatePack: checking Minecraft install. currentMc=" + instance.getMinecraftVersion() + " targetMc=" + manifest.getMinecraftVersion());
         
         boolean needsMinecraftInstall = instance.getMinecraftVersion() == null || 
                                         !instance.getMinecraftVersion().equals(manifest.getMinecraftVersion());
         
         if (needsMinecraftInstall) {
+            LauncherLogger.info("installOrUpdatePack: needs Minecraft install. loader=" + manifest.getLoaderType() + " loaderVer=" + manifest.getLoaderVersion());
             if ("fabric".equalsIgnoreCase(manifest.getLoaderType())) {
+                LauncherLogger.info("installOrUpdatePack: installing Fabric mc=" + manifest.getMinecraftVersion() + " loader=" + manifest.getLoaderVersion());
                 boolean success = lib.installFabric(manifest.getMinecraftVersion(), manifest.getLoaderVersion());
+                LauncherLogger.info("installOrUpdatePack: Fabric install result=" + success);
                 if (!success) {
                     System.err.println(ZAnsi.brightRed("Failed to install Fabric"));
+                    LauncherLogger.error("installOrUpdatePack: Fabric install failed");
                     reportProgress("Failed to install Fabric", 0, "error", 0, 1);
                     return false;
                 }
             } else if ("neoforge".equalsIgnoreCase(manifest.getLoaderType())) {
+                LauncherLogger.info("installOrUpdatePack: installing NeoForge mc=" + manifest.getMinecraftVersion() + " loader=" + manifest.getLoaderVersion());
                 boolean success = lib.installNeoForge(manifest.getMinecraftVersion(), manifest.getLoaderVersion());
+                LauncherLogger.info("installOrUpdatePack: NeoForge install result=" + success);
                 if (!success) {
                     System.err.println(ZAnsi.brightRed("Failed to install NeoForge"));
+                    LauncherLogger.error("installOrUpdatePack: NeoForge install failed");
                     reportProgress("Failed to install NeoForge", 0, "error", 0, 1);
                     return false;
                 }
             } else if ("forge".equalsIgnoreCase(manifest.getLoaderType())) {
+                LauncherLogger.info("installOrUpdatePack: installing Forge mc=" + manifest.getMinecraftVersion() + " loader=" + manifest.getLoaderVersion());
                 boolean success = lib.installForge(manifest.getMinecraftVersion(), manifest.getLoaderVersion());
+                LauncherLogger.info("installOrUpdatePack: Forge install result=" + success);
                 if (!success) {
                     System.err.println(ZAnsi.brightRed("Failed to install Forge"));
+                    LauncherLogger.error("installOrUpdatePack: Forge install failed");
                     reportProgress("Failed to install Forge", 0, "error", 0, 1);
                     return false;
                 }
             } else {
+                LauncherLogger.info("installOrUpdatePack: installing Vanilla Minecraft " + manifest.getMinecraftVersion());
                 boolean success = lib.installMinecraft(manifest.getMinecraftVersion());
+                LauncherLogger.info("installOrUpdatePack: Vanilla install result=" + success);
                 if (!success) {
                     System.err.println(ZAnsi.brightRed("Failed to install Vanilla Minecraft"));
+                    LauncherLogger.error("installOrUpdatePack: Vanilla install failed");
                     reportProgress("Failed to install Vanilla Minecraft", 0, "error", 0, 1);
                     return false;
                 }
             }
+            LauncherLogger.info("installOrUpdatePack: Minecraft+loader install completed successfully");
         } else {
+            LauncherLogger.info("installOrUpdatePack: Minecraft already installed, skipping");
             System.out.println(ZAnsi.green("Minecraft already installed, skipping..."));
         }
         
         reportProgress("Scanning local files...", 30, "Installing pack files", 4, 5);
         
         // 3. Scan local files only if there are files to download
+        LauncherLogger.info("installOrUpdatePack: scanning local files...");
         Map<String, String> localFiles = scanLocalFiles();
+        LauncherLogger.info("installOrUpdatePack: scanLocalFiles returned " + localFiles.size() + " files. instancePath=" + instance.getPath());
         
         // If pack has no files (vanilla/loader only), skip diff
         if (manifest.files == null || manifest.files.isEmpty()) {
+            LauncherLogger.info("installOrUpdatePack: no files in manifest, skipping diff");
             System.out.println(ZAnsi.green("Pack contains no additional files"));
             reportProgress("Installing...", 50, "Installing pack files", 4, 5);
             
-            // Update instance metadata
+            saveUserFilesSnapshot(localFiles);
+            
             instance.setServerPack(true);
             instance.setServerPackName(packName);
             instance.setServerVersion(manifest.getVersion());
@@ -228,18 +251,44 @@ public class PackDownloader {
             System.out.println(ZAnsi.brightGreen("Pack installed successfully!"));
             return true;
         }
+        LauncherLogger.info("installOrUpdatePack: manifest has " + manifest.files.size() + " files, proceeding to diff");
         
         // 4. Send diff request
-        System.out.println(ZAnsi.cyan("Checking pack files..."));
+        LauncherLogger.info("installOrUpdatePack: requesting diff from server...");
         reportProgress("Checking pack files...", 40, "Installing pack files", 4, 5);
-        DiffResponse diff = getDiff(packName, localFiles);
+        DiffResponse diff = null;
+        try {
+            diff = getDiff(packName, localFiles, preset);
+            LauncherLogger.info("installOrUpdatePack: diff received: toDownload=" + diff.getToDownload().size() + " toDelete=" + diff.getToDelete().size() + " version=" + diff.getVersion());
+        } catch (Exception e) {
+            LauncherLogger.error("installOrUpdatePack: getDiff failed: " + e.getClass().getName() + " - " + e.getMessage());
+            e.printStackTrace();
+            throw e;
+        }
         
-        // 5. Apply changes
+        // 5. Detect user-modified files
+        Set<String> protectedFiles = getUserModifiedFiles(localFiles);
+        LauncherLogger.info("installOrUpdatePack: user-modified files count=" + protectedFiles.size());
+        
+        // 6. Apply changes
+        LauncherLogger.info("installOrUpdatePack: starting applyDiff...");
         reportProgress("Downloading pack files...", 50, "Installing pack files", 4, 5);
-        boolean success = applyDiff(diff, packName);
+        boolean success = false;
+        try {
+            success = applyDiff(diff, packName, protectedFiles);
+            LauncherLogger.info("installOrUpdatePack: applyDiff returned=" + success);
+        } catch (Exception e) {
+            LauncherLogger.error("installOrUpdatePack: applyDiff threw exception: " + e.getClass().getName() + " - " + e.getMessage());
+            e.printStackTrace();
+            throw e;
+        }
         
         if (success) {
-            // 6. Update instance metadata
+            LauncherLogger.info("installOrUpdatePack: saving user files snapshot...");
+            Map<String, String> updatedHashes = scanLocalFiles();
+            saveUserFilesSnapshot(updatedHashes);
+
+            LauncherLogger.info("installOrUpdatePack: updating instance metadata...");
             instance.setServerPack(true);
             instance.setServerPackName(packName);
             instance.setServerVersion(manifest.getVersion());
@@ -249,6 +298,9 @@ public class PackDownloader {
             instance.setAssetIndex(manifest.getAssetIndex());
             
             System.out.println(ZAnsi.brightGreen("Pack installed successfully!"));
+            LauncherLogger.info("installOrUpdatePack: SUCCESS");
+        } else {
+            LauncherLogger.error("installOrUpdatePack: FAILED - applyDiff returned false without exception");
         }
         
         return success;
@@ -271,6 +323,10 @@ public class PackDownloader {
      * Update an existing server pack
      */
     public boolean updatePack(String packName) throws Exception {
+        return updatePack(packName, instance.getPresetId());
+    }
+
+    public boolean updatePack(String packName, String preset) throws Exception {
         System.out.println(ZAnsi.cyan("Checking updates for " + instance.getName() + "..."));
         
         PackManifest manifest = getPackManifest(packName);
@@ -286,13 +342,24 @@ public class PackDownloader {
         // Scan local files
         Map<String, String> localFiles = scanLocalFiles();
         
+        // Detect user-modified files (skip overwriting)
+        Set<String> protectedFiles = getUserModifiedFiles(localFiles);
+        if (!protectedFiles.isEmpty()) {
+            LauncherLogger.info("[DEBUG] Found " + protectedFiles.size() + " user-modified files (will not overwrite)");
+            System.out.println(ZAnsi.yellow("Found " + protectedFiles.size() + " user-modified files, they will not be overwritten"));
+        }
+        
         // Get diff
-        DiffResponse diff = getDiff(packName, localFiles);
+        DiffResponse diff = getDiff(packName, localFiles, preset);
         
         // Apply changes
-        boolean success = applyDiff(diff, packName);
+        boolean success = applyDiff(diff, packName, protectedFiles, preset);
         
         if (success) {
+            // Save new user files snapshot
+            Map<String, String> updatedHashes = scanLocalFiles();
+            saveUserFilesSnapshot(updatedHashes);
+            
             instance.setServerVersion(serverVersion);
             System.out.println(ZAnsi.brightGreen("Pack updated to v" + serverVersion));
         }
@@ -310,7 +377,7 @@ public class PackDownloader {
         // Игнорируемые директории
         Set<String> ignoredDirs = Set.of(
             "resourcepacks", "shaderpacks", "saves", "logs",
-            "crash-reports", "screenshots", "journeymap", "config",
+            "crash-reports", "screenshots", "journeymap",
             "natives", "assets", "libraries", "versions", "cache"
         );
         
@@ -324,7 +391,8 @@ public class PackDownloader {
                 Path relative = instancePath.relativize(file);
                 String path = relative.toString().replace("\\", "/");
                 
-                // Проверяем, не в игнорируемой ли директории
+                // Skip user files snapshot and ignored directories
+                if (path.equals(USER_FILES_FILE)) return;
                 for (String ignored : ignoredDirs) {
                     if (path.startsWith(ignored + "/") || path.startsWith(ignored + "\\")) {
                         return;
@@ -346,6 +414,10 @@ public class PackDownloader {
      * Send diff request to server
      */
     private DiffResponse getDiff(String packName, Map<String, String> localFiles) throws Exception {
+        return getDiff(packName, localFiles, null);
+    }
+
+    private DiffResponse getDiff(String packName, Map<String, String> localFiles, String preset) throws Exception {
         String json = gson.toJson(localFiles);
 
         // Get auth token
@@ -358,6 +430,10 @@ public class PackDownloader {
         }
 
         String url = ZHttpClient.getBaseUrl() + "/pack/" + packName + "/diff";
+        if (preset != null && !preset.isEmpty()) {
+            url += "?preset=" + java.net.URLEncoder.encode(preset, "UTF-8");
+        }
+        LauncherLogger.info("getDiff: url=" + url + " bodySize=" + json.length() + " authToken=" + (accessToken != null ? "present" : "null") + " localFilesCount=" + json.length());
 
         // Use HttpURLConnection for full control
         java.net.HttpURLConnection connection = null;
@@ -381,6 +457,7 @@ public class PackDownloader {
             }
 
             int responseCode = connection.getResponseCode();
+            LauncherLogger.info("getDiff: responseCode=" + responseCode + " packName=" + packName);
 
             // Read response
             StringBuilder response = new StringBuilder();
@@ -393,6 +470,7 @@ public class PackDownloader {
             }
 
             String responseBody = response.toString();
+            LauncherLogger.info("[DEBUG] getDiff response body: " + responseBody.substring(0, Math.min(responseBody.length(), 500)));
 
             if (responseCode == 403) {
                 throw new IOException("Active pass required to download packs. Contact the administrator.");
@@ -402,7 +480,9 @@ public class PackDownloader {
                 throw new IOException("HTTP " + responseCode + ": " + extractErrorFromResponse(responseBody));
             }
 
-            return gson.fromJson(responseBody, DiffResponse.class);
+            DiffResponse result = gson.fromJson(responseBody, DiffResponse.class);
+            LauncherLogger.info("[DEBUG] getDiff parsed: toDownload=" + result.getToDownload().size() + " toDelete=" + result.getToDelete().size());
+            return result;
 
         } finally {
             if (connection != null) {
@@ -425,9 +505,21 @@ public class PackDownloader {
      * Apply diff (download new files, delete old ones)
      */
     private boolean applyDiff(DiffResponse diff, String packName) {
+        return applyDiff(diff, packName, new HashSet<>(), null);
+    }
+
+    private boolean applyDiff(DiffResponse diff, String packName, Set<String> protectedFiles) {
+        return applyDiff(diff, packName, protectedFiles, null);
+    }
+
+    private boolean applyDiff(DiffResponse diff, String packName, Set<String> protectedFiles, String preset) {
+        LauncherLogger.info("applyDiff: start. toDownload=" + diff.getToDownload().size() + " toDelete=" + diff.getToDelete().size() + " protected=" + protectedFiles.size());
         System.out.println(ZAnsi.cyan("\nApplying changes:"));
         System.out.println("  Download: " + diff.getToDownload().size() + " files");
         System.out.println("  Delete: " + diff.getToDelete().size() + " files");
+        if (!protectedFiles.isEmpty()) {
+            System.out.println(ZAnsi.yellow("  Protected: " + protectedFiles.size() + " user-modified files (skipped)"));
+        }
         
         // Create directories if needed
         try {
@@ -437,8 +529,12 @@ public class PackDownloader {
             return false;
         }
         
-        // Delete files
+        // Delete files (skip protected)
         for (String filePath : diff.getToDelete()) {
+            if (protectedFiles.contains(filePath)) {
+                System.out.println(ZAnsi.yellow("  Skipped delete (user-modified): " + filePath));
+                continue;
+            }
             Path fullPath = instance.getPath().resolve(filePath);
             try {
                 if (Files.deleteIfExists(fullPath)) {
@@ -449,12 +545,25 @@ public class PackDownloader {
             }
         }
         
-        // Download files
+        // Download files (skip protected)
         AtomicInteger downloaded = new AtomicInteger(0);
         int total = diff.getToDownload().size();
+        int skipped = 0;
+        long totalBytes = 0;
+        for (FileInfo f : diff.getToDownload()) totalBytes += f.getSize();
+        AtomicLong downloadedBytes = new AtomicLong(0);
+        long downloadStartTime = System.currentTimeMillis();
+        LauncherLogger.info("applyDiff: downloading " + total + " files, total size=" + totalBytes + " bytes");
         
         for (FileInfo file : diff.getToDownload()) {
             String path = file.getPath();
+            
+            if (protectedFiles.contains(path)) {
+                skipped++;
+                System.out.println(ZAnsi.yellow("  Skipped (user-modified): " + path));
+                continue;
+            }
+            
             Path fullPath = instance.getPath().resolve(path);
             
             try {
@@ -462,80 +571,103 @@ public class PackDownloader {
                 Files.createDirectories(fullPath.getParent());
                 
                 // Download file
+                String fileUrl = ZHttpClient.getBaseUrl() + file.getUrl();
+                if (preset != null && !preset.isEmpty() && !file.getUrl().contains("preset=")) {
+                    String sep = file.getUrl().contains("?") ? "&" : "?";
+                    fileUrl = fileUrl + sep + "preset=" + java.net.URLEncoder.encode(preset, "UTF-8");
+                }
+                LauncherLogger.info("applyDiff: downloading file=" + path + " url=" + fileUrl + " size=" + file.getSize() + " hash=" + file.getHash());
                 downloadFile(file, fullPath);
                 
                 // Verify hash
                 String actualHash = calculateHash(fullPath);
-                if (!actualHash.equals(file.getHash())) {
-                    throw new IOException("Hash mismatch! Expected: " + file.getHash() + 
-                                         ", got: " + actualHash);
+                boolean hashMatch = actualHash.equals(file.getHash());
+                LauncherLogger.info("applyDiff: downloaded file=" + path + " hashMatch=" + hashMatch + " expected=" + file.getHash() + " got=" + actualHash);
+                if (!hashMatch) {
+                    LauncherLogger.warn("applyDiff: hash mismatch for " + path + ", retrying once...");
+                    downloadFile(file, fullPath);
+                    actualHash = calculateHash(fullPath);
+                    hashMatch = actualHash.equals(file.getHash());
+                    LauncherLogger.info("applyDiff: retry result for " + path + " hashMatch=" + hashMatch);
+                }
+                if (!hashMatch) {
+                    LauncherLogger.warn("applyDiff: skipping file " + path + " due to hash mismatch (expected=" + file.getHash() + " got=" + actualHash + ")");
+                    System.err.println(ZAnsi.yellow("  Skipped (hash mismatch): " + path));
+                    skipped++;
+                    continue;
                 }
                 
                 downloaded.incrementAndGet();
+                downloadedBytes.addAndGet(file.getSize());
                 if (total > 0) {
                     ProgressBar.show("Download", downloaded.get(), total, "files");
-                    int pct = 50 + (downloaded.get() * 45 / total);
-                    reportProgress("Downloading " + downloaded.get() + "/" + total + " files...", pct, "Installing pack files", 4, 5);
+                    long elapsed = System.currentTimeMillis() - downloadStartTime;
+                    long bytesSoFar = downloadedBytes.get();
+                    long remainingBytes = totalBytes - bytesSoFar;
+                    int pct = totalBytes > 0 ? (int)(bytesSoFar * 45 / totalBytes) : (downloaded.get() * 45 / total);
+                    pct = Math.min(pct, 45);
+                    String speedStr = "";
+                    String etaStr = "";
+                    if (elapsed > 1000) {
+                        long speedBps = bytesSoFar * 1000 / elapsed;
+                        if (speedBps > 1_000_000) {
+                            speedStr = String.format("%.1f MB/s", speedBps / 1_000_000.0);
+                        } else if (speedBps > 1_000) {
+                            speedStr = String.format("%.0f KB/s", speedBps / 1_000.0);
+                        } else {
+                            speedStr = speedBps + " B/s";
+                        }
+                        if (speedBps > 0 && remainingBytes > 0) {
+                            long etaSec = remainingBytes / speedBps;
+                            if (etaSec > 3600) {
+                                etaStr = String.format("%dh %dm", etaSec / 3600, (etaSec % 3600) / 60);
+                            } else if (etaSec > 60) {
+                                etaStr = String.format("%dm %ds", etaSec / 60, etaSec % 60);
+                            } else {
+                                etaStr = etaSec + "s";
+                            }
+                        }
+                    }
+                    String label = "Downloading " + downloaded.get() + "/" + total + " files";
+                    if (!speedStr.isEmpty()) label += " (" + speedStr;
+                    if (!etaStr.isEmpty()) label += " ETA: " + etaStr;
+                    if (!speedStr.isEmpty()) label += ")";
+                    reportProgress(label, 50 + pct, "Installing pack files", 4, 5);
                 }
                 
             } catch (Exception e) {
+                LauncherLogger.error("applyDiff: download FAILED for path=" + path + " error=" + e.getClass().getName() + ": " + e.getMessage());
                 System.err.println("\n" + ZAnsi.red("  Download error " + path + ": " + e.getMessage()));
-                return false;
+                System.err.println(ZAnsi.yellow("  Skipping file " + path + " due to download error"));
+                skipped++;
+                continue;
             }
         }
         
         if (total > 0) {
             ProgressBar.finish("Download");
         }
+        if (skipped > 0) {
+            System.out.println(ZAnsi.cyan("  Skipped " + skipped + " user-modified files"));
+        }
         
         return true;
     }
 
     /**
-     * Скачать один файл с сервера
+     * Скачать один файл с сервера через временный файл для атомарности.
+     * Предотвращает появление битых файлов при обрыве соединения.
      */
     private void downloadFile(FileInfo file, Path destination) throws Exception {
-        String url = ZHttpClient.getBaseUrl() + file.getUrl();
-        String accessToken = AuthManager.getAccessToken();
-        
-        HttpRequest.Builder builder = HttpRequest.newBuilder()
-            .uri(java.net.URI.create(url))
-            .timeout(Duration.ofSeconds(60))
-            .header("User-Agent", "ZernMC-Launcher/1.0")
-            .GET();
-        
-        if (accessToken != null && !accessToken.equals("0")) {
-            builder.header("Authorization", "Bearer " + accessToken);
+        Path tmpFile = destination.resolveSibling(destination.getFileName() + ".tmp");
+        try {
+            String url = ZHttpClient.getBaseUrl() + file.getUrl();
+            ZHttpClient.downloadFileWithSmartProxy(url, tmpFile);
+            Files.move(tmpFile, destination, StandardCopyOption.REPLACE_EXISTING, StandardCopyOption.ATOMIC_MOVE);
+        } catch (Exception e) {
+            try { Files.deleteIfExists(tmpFile); } catch (Exception ignored) {}
+            throw e;
         }
-        
-        HttpRequest request = builder.build();
-        HttpResponse<InputStream> response = httpClient.send(request,
-            HttpResponse.BodyHandlers.ofInputStream());
-        
-        if (response.statusCode() != 200) {
-            throw new IOException("HTTP " + response.statusCode());
-        }
-        
-        // Скачиваем с прогрессом
-        try (InputStream in = response.body();
-             FileOutputStream out = new FileOutputStream(destination.toFile())) {
-            
-            byte[] buffer = new byte[8192];
-            int bytesRead;
-            long totalRead = 0;
-            long fileSize = file.getSize();
-            
-            while ((bytesRead = in.read(buffer)) != -1) {
-                out.write(buffer, 0, bytesRead);
-                totalRead += bytesRead;
-                
-                if (fileSize > 0 && totalRead % 8192 == 0) {
-                    ProgressBar.showDownload("  " + file.getPath(), totalRead, fileSize);
-                }
-            }
-        }
-        
-        ProgressBar.clearLine();
     }
 
     /**
@@ -560,6 +692,59 @@ public class PackDownloader {
         return sb.toString();
     }
 
+    // ====================== User Files Protection ======================
+    // Keeps a snapshot of file hashes after each install/update.
+    // On next update, files modified by the user are not overwritten.
+
+    private Path getUserFilesPath() {
+        return instance.getPath().resolve(USER_FILES_FILE);
+    }
+
+    private void saveUserFilesSnapshot(Map<String, String> fileHashes) {
+        try {
+            Path path = getUserFilesPath();
+            Files.createDirectories(path.getParent());
+            Files.writeString(path, gson.toJson(fileHashes));
+        } catch (Exception e) {
+            LauncherLogger.warn("Failed to save user files snapshot: " + e.getMessage());
+        }
+    }
+
+    private Map<String, String> loadUserFilesSnapshot() {
+        Path path = getUserFilesPath();
+        if (!Files.exists(path)) return new HashMap<>();
+        try {
+            String content = Files.readString(path);
+            Map<String, Object> raw = gson.fromJson(content, Map.class);
+            Map<String, String> result = new HashMap<>();
+            if (raw != null) {
+                for (Map.Entry<String, Object> e : raw.entrySet()) {
+                    result.put(e.getKey(), e.getValue() != null ? e.getValue().toString() : "");
+                }
+            }
+            return result;
+        } catch (Exception e) {
+            LauncherLogger.warn("Failed to load user files snapshot: " + e.getMessage());
+            return new HashMap<>();
+        }
+    }
+
+    private Set<String> getUserModifiedFiles(Map<String, String> currentHashes) {
+        Map<String, String> snapshot = loadUserFilesSnapshot();
+        if (snapshot.isEmpty()) return new HashSet<>();
+
+        Set<String> modified = new HashSet<>();
+        for (Map.Entry<String, String> e : currentHashes.entrySet()) {
+            String path = e.getKey();
+            String currentHash = e.getValue();
+            String snapshotHash = snapshot.get(path);
+            if (snapshotHash != null && !snapshotHash.equals(currentHash)) {
+                modified.add(path);
+            }
+        }
+        return modified;
+    }
+
     // ====================== Вложенные классы ======================
 
     public static class PackManifest {

launcher/launcher/src/main/java/sashegdev/zernmc/launcher/minecraft/installer/ForgeInstaller.java

@@ -157,7 +157,8 @@ public class ForgeInstaller {
                     "java",
                     "-jar",
                     installerJar.toAbsolutePath().toString(),
-                    "--installClient"
+                    "--installClient",
+                    instance.getPath().toAbsolutePath().toString()
             );
 
             // Add JVM args for increased timeouts

launcher/launcher/src/main/java/sashegdev/zernmc/launcher/minecraft/installer/NeoForgeInstaller.java

@@ -164,7 +164,8 @@ public class NeoForgeInstaller {
                     "java",
                     "-jar",
                     installerJar.toAbsolutePath().toString(),
-                    "--installClient"
+                    "--installClient",
+                    instance.getPath().toAbsolutePath().toString()
             );
 
             pb.environment().put("JAVA_OPTS", "-Dhttp.connectionTimeout=60000 -Dhttp.socketTimeout=60000");

launcher/launcher/src/main/java/sashegdev/zernmc/launcher/minecraft/launch/LaunchCommandBuilder.java

@@ -5,15 +5,30 @@ import me.sashegdev.zernmc.launcher.minecraft.model.LaunchOptions;
 import me.sashegdev.zernmc.launcher.utils.ZAnsi;
 import org.json.JSONObject;
 
+import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.Path;
+import java.util.zip.ZipException;
+import java.util.zip.ZipFile;
 import java.util.ArrayList;
 import java.util.HashMap;
+import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
+import java.util.Set;
 
 public class LaunchCommandBuilder {
 
+    private static final List<Path> tempFiles = new ArrayList<>();
+
+    static {
+        Runtime.getRuntime().addShutdownHook(new Thread(() -> {
+            for (Path p : tempFiles) {
+                try { Files.deleteIfExists(p); } catch (Exception ignored) {}
+            }
+        }));
+    }
+
     private final Instance instance;
 
     public LaunchCommandBuilder(Instance instance) {
@@ -42,13 +57,68 @@ public class LaunchCommandBuilder {
         
         VersionManifest manifest = resolveVersionManifest();
         
-        // For modloaders, always use vanilla classpath with all libraries
+        // For modloaders, use vanilla classpath but read main class from manifest when available
         if (isModloader) {
-            System.out.println(ZAnsi.cyan("  Modloader detected (" + loaderType + "), using vanilla classpath"));
-            command.add("-cp");
-            command.add(buildVanillaClasspath());
-            command.add(getVanillaMainClass());
-            command.addAll(getVanillaGameArguments(options));
+            // For Forge/NeoForge: use recursive scan of libraries/ for classpath,
+            // always use ModLauncher as main class (version.json might have
+            // BootstrapLauncher which breaks with Java module system)
+            if ("forge".equals(loaderType) || "neoforge".equals(loaderType)) {
+                // BootstrapLauncher creates the module layer ModLauncher needs
+                // for ServiceLoader discovery.
+                // Build classpath from manifest (shorter, ordered).
+                // Only JARs explicitly listed in version.json go on the classpath.
+                // Do NOT append JARs from recursive scan — tool JARs like
+                // ForgeAutoRenamingTool that contain shaded ASM packages cause
+                // split-package conflicts with the Java module system when
+                // --add-modules=ALL-MODULE-PATH resolves them as automatic modules.
+                String classpath;
+                if (manifest != null) {
+                    classpath = buildClasspathFromManifest(manifest);
+                } else {
+                    classpath = "";
+                }
+                if (classpath == null || classpath.isEmpty()) {
+                    classpath = buildVanillaClasspath();
+                } else {
+                    // Safety net: remove JARs from classpath that are already
+                    // on the module path (from manifest JVM args) to prevent
+                    // Java module system split-package conflicts.
+                    classpath = filterClasspathAgainstModulePath(classpath, manifest.getJvmArguments());
+                }
+                command.add("-cp");
+                command.add(writeClasspathFile(classpath));
+
+                // Add JVM arguments from version.json manifest
+                // Includes -DignoreList, -p (module path), --add-modules, --add-opens,
+                // and -DlibraryDirectory — all required for BootstrapLauncher to
+                // resolve cpw.mods.securejarhandler as a module.
+                if (manifest != null) {
+                    Map<String, String> vars = buildVariableMap(options);
+                    for (String arg : manifest.getJvmArguments()) {
+                        command.add(resolveVariable(arg, vars));
+                    }
+                }
+
+                command.add("-DlibraryDirectory=" + instance.getPath().resolve("libraries").toAbsolutePath());
+                command.add(getVanillaMainClass());
+                command.addAll(getVanillaGameArguments(options));
+                command.addAll(getModloaderLaunchArgs());
+            } else {
+                System.out.println(ZAnsi.cyan("  Modloader detected (" + loaderType + "), using vanilla classpath"));
+                command.add("-cp");
+                command.add(writeClasspathFile(buildVanillaClasspath()));
+                String mainClass = null;
+                if (manifest != null) {
+                    mainClass = manifest.getMainClass();
+                    System.out.println(ZAnsi.cyan("  Main class from manifest: " + mainClass));
+                }
+                if (mainClass == null || mainClass.isEmpty()) {
+                    mainClass = getVanillaMainClass();
+                    System.out.println(ZAnsi.yellow("  Using fallback main class: " + mainClass));
+                }
+                command.add(mainClass);
+                command.addAll(getVanillaGameArguments(options));
+            }
         } else if (manifest != null) {
             String classpath = buildClasspathFromManifest(manifest);
             
@@ -56,12 +126,12 @@ public class LaunchCommandBuilder {
             if (classpath.isEmpty() || classpath.equals(instance.getPath().resolve("versions").resolve(getVersionId()).resolve(getVersionId() + ".jar").toAbsolutePath().toString())) {
                 System.out.println(ZAnsi.yellow("  manifest classpath empty, using vanilla classpath"));
                 command.add("-cp");
-                command.add(buildVanillaClasspath());
+                command.add(writeClasspathFile(buildVanillaClasspath()));
                 command.add(getVanillaMainClass());
                 command.addAll(getVanillaGameArguments(options));
             } else {
                 command.add("-cp");
-                command.add(classpath);
+                command.add(writeClasspathFile(classpath));
 
                 String mainClass = resolveMainClass(manifest);
                 command.add(mainClass);
@@ -70,7 +140,7 @@ public class LaunchCommandBuilder {
             }
         } else {
             command.add("-cp");
-            command.add(buildVanillaClasspath());
+            command.add(writeClasspathFile(buildVanillaClasspath()));
             command.add(getVanillaMainClass());
             command.addAll(getVanillaGameArguments(options));
         }
@@ -85,7 +155,12 @@ public class LaunchCommandBuilder {
                 String content = Files.readString(versionJson);
                 JSONObject json = new JSONObject(content);
             System.out.println(ZAnsi.green("Found version.json: " + versionJson.getFileName()));
-                return new VersionManifest(json);
+                VersionManifest manifest = new VersionManifest(json);
+                manifest.resolveParent(instance.getPath().resolve("versions"));
+                if (manifest.getInheritsFrom() != null) {
+                    System.out.println(ZAnsi.cyan("  inheritsFrom: " + manifest.getInheritsFrom()));
+                }
+                return manifest;
             } else {
                 System.out.println(ZAnsi.yellow("version.json not found for " + instance.getName()));
                 System.out.println(ZAnsi.yellow("  loaderType=" + instance.getLoaderType() + " mcVersion=" + instance.getMinecraftVersion() + " loaderVersion=" + instance.getLoaderVersion()));
@@ -212,13 +287,107 @@ public class LaunchCommandBuilder {
         if ("fabric".equals(loaderType)) {
             return "net.fabricmc.loader.impl.launch.knot.KnotClient";
         } else if ("forge".equals(loaderType)) {
-            return "net.minecraftforge.client.main.ForgeClient";
+            return "cpw.mods.bootstraplauncher.BootstrapLauncher";
         } else if ("neoforge".equals(loaderType)) {
             return "cpw.mods.bootstraplauncher.BootstrapLauncher";
         }
         return "net.minecraft.client.main.Main";
     }
 
+    private List<String> getModloaderLaunchArgs() {
+        List<String> args = new ArrayList<>();
+        String loaderType = instance.getLoaderType().toLowerCase();
+        String mcVer = instance.getMinecraftVersion();
+        String loaderVer = instance.getLoaderVersion();
+
+        if ("forge".equals(loaderType)) {
+            args.add("--launchTarget");
+            args.add("forgeclient");
+            if (loaderVer != null && !loaderVer.isEmpty()) {
+                args.add("--fml.forgeVersion");
+                args.add(loaderVer);
+            }
+            if (mcVer != null && !mcVer.isEmpty()) {
+                args.add("--fml.mcVersion");
+                args.add(mcVer);
+            }
+            args.add("--fml.forgeGroup");
+            args.add("net.minecraftforge");
+            // Read mcpVersion from version.json if possible, fallback to empty
+            String mcpVer = getMcpVersion(mcVer);
+            if (mcpVer != null && !mcpVer.isEmpty()) {
+                args.add("--fml.mcpVersion");
+                args.add(mcpVer);
+            }
+        } else if ("neoforge".equals(loaderType)) {
+            args.add("--launchTarget");
+            args.add("neoforgeclient");
+            if (loaderVer != null && !loaderVer.isEmpty()) {
+                args.add("--fml.neoForgeVersion");
+                args.add(loaderVer);
+            }
+            if (mcVer != null && !mcVer.isEmpty()) {
+                args.add("--fml.mcVersion");
+                args.add(mcVer);
+            }
+            args.add("--fml.neoForgeGroup");
+            args.add("net.neoforged");
+        }
+
+        return args;
+    }
+
+    private String getMcpVersion(String mcVersion) {
+        if (mcVersion == null) return null;
+        Path versionsDir = instance.getPath().resolve("versions");
+        String loaderType = instance.getLoaderType().toLowerCase();
+        String loaderVer = instance.getLoaderVersion();
+        // Try the same candidate paths as findVersionJson()
+        String[] candidates = {
+            getVersionId(),
+            mcVersion + "-" + loaderType + "-" + loaderVer,
+            loaderType + "-" + loaderVer,
+            mcVersion + "-" + loaderVer,
+            mcVersion
+        };
+        for (String candidate : candidates) {
+            try {
+                Path jsonPath = versionsDir.resolve(candidate).resolve(candidate + ".json");
+                if (Files.exists(jsonPath)) {
+                    String content = Files.readString(jsonPath);
+                    JSONObject json = new JSONObject(content);
+                    if (json.has("+mcpVersion")) {
+                        return json.getString("+mcpVersion");
+                    }
+                    if (json.has("mcpVersion")) {
+                        return json.getString("mcpVersion");
+                    }
+                }
+            } catch (Exception ignored) {}
+        }
+        // Fallback: known MCP versions for common MC releases
+        switch (mcVersion) {
+            case "1.21": return "20240808.143909";
+            case "1.20.6": return "20240429.145301";
+            case "1.20.4": return "20231214.122116";
+            case "1.20.3": return "20231214.122116";
+            case "1.20.2": return "20231119.165538";
+            case "1.20.1": return "20231207.220116";
+            case "1.20": return "20231013.142340";
+            case "1.19.4": return "20230316.153408";
+            case "1.19.3": return "20221207.173059";
+            case "1.19.2": return "20221124.190222";
+            case "1.19.1": return "20220810.141647";
+            case "1.19": return "20220617.144144";
+            case "1.18.2": return "20220404.170452";
+            case "1.18.1": return "20220116.232031";
+            case "1.18": return "20211214.190725";
+            case "1.17.1": return "20210727.130541";
+            case "1.17": return "20210701.125435";
+            default: return null;
+        }
+    }
+
     private List<String> resolveGameArguments(VersionManifest manifest, LaunchOptions options) {
         List<String> args = new ArrayList<>();
         Map<String, String> vars = buildVariableMap(options);
@@ -321,19 +490,53 @@ public class LaunchCommandBuilder {
         List<String> paths = new ArrayList<>();
         Path librariesDir = instance.getPath().resolve("libraries");
 
-        System.out.println(ZAnsi.cyan("  buildClasspathFromManifest: " + manifest.getLibraries().size() + " libraries in manifest"));
+        System.out.println(ZAnsi.cyan("  buildClasspathFromManifest: " + manifest.getAllLibraries().size() + " libraries in manifest (including inherited)"));
 
-        for (VersionManifest.Library lib : manifest.getLibraries()) {
-            Path libPath = librariesDir.resolve(lib.artifactPath);
-            if (Files.exists(libPath)) {
-                paths.add(libPath.toAbsolutePath().toString());
+        String loaderType = instance.getLoaderType().toLowerCase();
+        boolean isForgeLike = "forge".equals(loaderType) || "neoforge".equals(loaderType);
+
+        for (VersionManifest.Library lib : manifest.getAllLibraries()) {
+            // For Forge/NeoForge: skip Minecraft client libraries — they're loaded
+            // through Forge's own module system (securejarhandler + module path).
+            // Having them on the classpath creates automatic modules that conflict
+            // with Forge's own module layer (split-package ResolutionException).
+            if (isForgeLike && (lib.name.startsWith("net.minecraft:client") || lib.name.contains("minecraft"))) {
+                System.out.println(ZAnsi.cyan("  Skipping Minecraft lib: " + lib.name));
+                continue;
+            }
+            Path libPath = lib.artifactPath != null ? librariesDir.resolve(lib.artifactPath) : null;
+            if (libPath != null && Files.exists(libPath)) {
+                if (isValidJar(libPath)) {
+                    paths.add(libPath.toAbsolutePath().toString());
+                } else {
+                    System.out.println(ZAnsi.yellow("  Corrupt library, deleting: " + lib.name));
+                    Files.delete(libPath);
+                }
             } else {
                 String mavenPath = mavenToPath(lib.name);
                 Path fallbackPath = librariesDir.resolve(mavenPath);
                 if (Files.exists(fallbackPath)) {
-                    paths.add(fallbackPath.toAbsolutePath().toString());
+                    if (isValidJar(fallbackPath)) {
+                        paths.add(fallbackPath.toAbsolutePath().toString());
+                    } else {
+                        System.out.println(ZAnsi.yellow("  Corrupt library, deleting: " + lib.name));
+                        Files.delete(fallbackPath);
+                    }
                 } else {
-                    System.out.println(ZAnsi.yellow("  Library not found: " + lib.name));
+                    // Last resort: scan libraries dir for a JAR matching this artifact
+                    String artifactName = lib.name.split(":")[1];
+                    Path found = scanForJar(librariesDir, artifactName);
+                    if (found != null) {
+                        if (isValidJar(found)) {
+                            System.out.println(ZAnsi.green("  Found by scan: " + lib.name + " → " + librariesDir.relativize(found)));
+                            paths.add(found.toAbsolutePath().toString());
+                        } else {
+                            System.out.println(ZAnsi.yellow("  Corrupt library (scan), deleting: " + found.getFileName()));
+                            Files.delete(found);
+                        }
+                    } else {
+                        System.out.println(ZAnsi.yellow("  Library not found (even after scan): " + lib.name));
+                    }
                 }
             }
         }
@@ -342,14 +545,34 @@ public class LaunchCommandBuilder {
 
         Path versionJar = findVersionJar();
         if (versionJar != null) {
-            paths.add(0, versionJar.toAbsolutePath().toString());
-            System.out.println(ZAnsi.green("  Added version jar: " + versionJar.getFileName()));
+            if (isValidJar(versionJar)) {
+                paths.add(0, versionJar.toAbsolutePath().toString());
+                System.out.println(ZAnsi.green("  Added version jar: " + versionJar.getFileName()));
+            } else {
+                System.out.println(ZAnsi.yellow("  Corrupt version jar, deleting: " + versionJar.getFileName()));
+                Files.delete(versionJar);
+            }
         }
 
         String separator = System.getProperty("os.name").toLowerCase().contains("win") ? ";" : ":";
         return String.join(separator, paths);
     }
 
+    private Path scanForJar(Path dir, String artifactName) throws IOException {
+        if (!Files.exists(dir)) return null;
+        try (var stream = Files.walk(dir)) {
+            return stream
+                .filter(p -> p.toString().endsWith(".jar"))
+                .filter(p -> {
+                    String name = p.getFileName().toString();
+                    // Match JARs like "artifactName-version.jar" but not "artifactName-other-version.jar"
+                    return name.startsWith(artifactName + "-") || name.equals(artifactName + ".jar");
+                })
+                .findFirst()
+                .orElse(null);
+        }
+    }
+
     private String buildVanillaClasspath() throws Exception {
         List<String> paths = new ArrayList<>();
         String versionId = getVersionId();
@@ -491,4 +714,69 @@ public class LaunchCommandBuilder {
 
         return jvmArgs;
     }
+
+    private boolean isValidJar(Path path) {
+        if (path == null || !Files.exists(path)) return false;
+        try (ZipFile zf = new ZipFile(path.toFile())) {
+            return true;
+        } catch (ZipException e) {
+            return false;
+        } catch (IOException e) {
+            return false;
+        }
+    }
+
+    /**
+     * Removes classpath entries that are already listed on the module path
+     * (from -p or --module-path in manifest JVM arguments). Prevents split-package
+     * conflicts when --add-modules=ALL-MODULE-PATH resolves classpath JARs
+     * as automatic modules.
+     */
+    private String filterClasspathAgainstModulePath(String classpath, List<String> manifestJvmArgs) {
+        if (classpath == null || classpath.isEmpty() || manifestJvmArgs == null || manifestJvmArgs.isEmpty()) {
+            return classpath;
+        }
+
+        Set<String> modulePathFilenames = new HashSet<>();
+
+        // Parse -p / --module-path values from manifest JVM arguments
+        for (int i = 0; i < manifestJvmArgs.size(); i++) {
+            String arg = manifestJvmArgs.get(i);
+            if (("-p".equals(arg) || "--module-path".equals(arg)) && i + 1 < manifestJvmArgs.size()) {
+                String modulePathValue = manifestJvmArgs.get(i + 1);
+                String sep = System.getProperty("os.name").toLowerCase().contains("win") ? ";" : ":";
+                for (String entry : modulePathValue.split(sep)) {
+                    int lastSep = Math.max(entry.lastIndexOf('/'), entry.lastIndexOf('\\'));
+                    modulePathFilenames.add(lastSep >= 0 ? entry.substring(lastSep + 1) : entry);
+                }
+            }
+        }
+
+        if (modulePathFilenames.isEmpty()) return classpath;
+
+        String separator = System.getProperty("os.name").toLowerCase().contains("win") ? ";" : ":";
+        StringBuilder filtered = new StringBuilder();
+        for (String entry : classpath.split(separator)) {
+            if (entry.isEmpty()) continue;
+            int lastSep = Math.max(entry.lastIndexOf('/'), entry.lastIndexOf('\\'));
+            String filename = lastSep >= 0 ? entry.substring(lastSep + 1) : entry;
+            if (!modulePathFilenames.contains(filename)) {
+                if (filtered.length() > 0) filtered.append(separator);
+                filtered.append(entry);
+            }
+        }
+
+        String result = filtered.toString();
+        return result.isEmpty() ? classpath : result;
+    }
+
+    // For very long classpaths (Windows cmd truncation), write to a temp argfile
+    private String writeClasspathFile(String classpath) throws IOException {
+        if (classpath.length() < 8000) return classpath;
+        Path tempFile = Files.createTempFile("zernmc-cp-", ".txt");
+        Files.writeString(tempFile, classpath);
+        tempFiles.add(tempFile);
+        System.out.println(ZAnsi.cyan("  Classpath too long (" + classpath.length() + " chars), using argfile: " + tempFile));
+        return "@" + tempFile.toAbsolutePath();
+    }
 }

launcher/launcher/src/main/java/sashegdev/zernmc/launcher/minecraft/launch/VersionManifest.java

@@ -15,13 +15,15 @@ public class VersionManifest {
     private final String id;
     private final String mainClass;
     private final String assetIndexId;
+    private final String inheritsFrom;
     private final List<String> jvmArguments;
     private final List<String> gameArguments;
     private final List<Library> libraries;
+    private VersionManifest parent;
 
     public VersionManifest(JSONObject json) {
         this.id = json.getString("id");
-        this.mainClass = json.getString("mainClass");
+        this.mainClass = json.optString("mainClass", "net.minecraft.client.main.Main");
 
         if (json.has("assetIndex")) {
             JSONObject ai = json.getJSONObject("assetIndex");
@@ -30,6 +32,7 @@ public class VersionManifest {
             this.assetIndexId = "unknown";
         }
 
+        this.inheritsFrom = json.optString("inheritsFrom", null);
         this.jvmArguments = parseArguments(json, "jvm");
         this.gameArguments = parseArguments(json, "game");
         this.libraries = parseLibraries(json);
@@ -38,10 +41,47 @@ public class VersionManifest {
     public String getId() { return id; }
     public String getMainClass() { return mainClass; }
     public String getAssetIndexId() { return assetIndexId; }
+    public String getInheritsFrom() { return inheritsFrom; }
     public List<String> getJvmArguments() { return jvmArguments; }
     public List<String> getGameArguments() { return gameArguments; }
     public List<Library> getLibraries() { return libraries; }
 
+    public void resolveParent(Path versionsDir) {
+        if (inheritsFrom == null || parent != null) return;
+        Path parentDir = versionsDir.resolve(inheritsFrom);
+        Path parentJson = parentDir.resolve(inheritsFrom + ".json");
+        if (Files.exists(parentJson)) {
+            try {
+                String content = Files.readString(parentJson);
+                JSONObject json = new JSONObject(content);
+                this.parent = new VersionManifest(json);
+                this.parent.resolveParent(versionsDir);
+            } catch (Exception e) {
+                System.out.println("Failed to load parent version " + inheritsFrom + ": " + e.getMessage());
+            }
+        }
+    }
+
+    public List<Library> getAllLibraries() {
+        List<Library> all = new ArrayList<>();
+        if (parent != null) {
+            all.addAll(parent.getAllLibraries());
+        }
+        for (Library lib : libraries) {
+            if (!containsLibrary(all, lib.name)) {
+                all.add(lib);
+            }
+        }
+        return all;
+    }
+
+    private boolean containsLibrary(List<Library> list, String name) {
+        for (Library l : list) {
+            if (l.name.equals(name)) return true;
+        }
+        return false;
+    }
+
     private List<String> parseArguments(JSONObject json, String type) {
         List<String> args = new ArrayList<>();
         if (!json.has("arguments")) return args;
@@ -129,29 +169,30 @@ public class VersionManifest {
         JSONArray arr = json.getJSONArray("libraries");
         for (int i = 0; i < arr.length(); i++) {
             JSONObject libJson = arr.getJSONObject(i);
+            String name = libJson.getString("name");
+            String artifactPath = null;
             if (libJson.has("downloads") && libJson.getJSONObject("downloads").has("artifact")) {
-                String name = libJson.getString("name");
-                String artifactPath = libJson.getJSONObject("downloads").getJSONObject("artifact").getString("path");
-                Library lib = new Library(name, artifactPath);
+                artifactPath = libJson.getJSONObject("downloads").getJSONObject("artifact").getString("path");
+            }
+            Library lib = new Library(name, artifactPath);
 
-                if (libJson.has("natives")) {
-                    JSONObject natives = libJson.getJSONObject("natives");
-                    for (String key : natives.keySet()) {
-                        String osKey = key.toLowerCase();
-                        lib.natives.put(osKey, natives.getString(key));
-                    }
+            if (libJson.has("natives")) {
+                JSONObject natives = libJson.getJSONObject("natives");
+                for (String key : natives.keySet()) {
+                    String osKey = key.toLowerCase();
+                    lib.natives.put(osKey, natives.getString(key));
                 }
+            }
 
-                if (libJson.has("rules")) {
-                    JSONObject dummyObj = new JSONObject();
-                    dummyObj.put("rules", libJson.getJSONArray("rules"));
-                    dummyObj.put("value", "");
-                    if (ruleMatches(dummyObj)) {
-                        libs.add(lib);
-                    }
-                } else {
-                    libs.add(lib);
-                }
+            boolean allowed = true;
+            if (libJson.has("rules")) {
+                JSONObject dummyObj = new JSONObject();
+                dummyObj.put("rules", libJson.getJSONArray("rules"));
+                dummyObj.put("value", "");
+                allowed = ruleMatches(dummyObj);
+            }
+            if (allowed) {
+                libs.add(lib);
             }
         }
         return libs;

launcher/launcher/src/main/java/sashegdev/zernmc/launcher/ui/jfx/JFXLauncher.java

@@ -713,8 +713,9 @@ public class JFXLauncher extends Application {
             String version = body.get("version");
             String loader = body.get("loader");
             String loaderVersion = body.get("loaderVersion");
+            String preset = body.get("preset");
 
-            log("Install: " + name + " " + version + " " + loader + (loaderVersion != null ? " " + loaderVersion : ""));
+            log("Install: " + name + " " + version + " " + loader + (loaderVersion != null ? " " + loaderVersion : "") + (preset != null ? " preset=" + preset : ""));
 
             var createResult = api.instances().createInstance(name);
             if (!createResult.isSuccess()) {
@@ -742,24 +743,35 @@ public class JFXLauncher extends Application {
                         boolean success = false;
                         
                         if ("zernmc".equalsIgnoreCase(loader)) {
+                            log("[DEBUG] Starting zernmc pack install for version=" + version);
                             setInstallProgressWithStage("Fetching pack info...", 10, 100, "Fetching pack info", 0, 5);
                             PackDownloader downloader = new PackDownloader(instance);
                             downloader.setProgressCallback((label, pct, stageName, stageIdx, stageCount) -> {
                                 setInstallProgressWithStage(label, pct, 100, stageName, stageIdx, stageCount);
                             });
+                            log("[DEBUG] Getting available packs...");
                             var packs = downloader.getAvailablePacks();
+                            log("[DEBUG] Available packs: " + (packs != null ? packs.size() : "null"));
                             ServerPack pack = null;
                             for (ServerPack p : packs) {
+                                log("[DEBUG] Checking pack: " + p.getName() + " vs " + version);
                                 if (p.getName().equals(version)) {
                                     pack = p;
                                     break;
                                 }
                             }
+                            log("[DEBUG] Selected pack: " + (pack != null ? pack.getName() : "null"));
                             if (pack != null) {
                                 try {
-                                    success = downloader.installOrUpdatePack(version, pack);
+                                    log("[DEBUG] Calling installOrUpdatePack..." + (preset != null ? " preset=" + preset : ""));
+                                    if (preset != null && !preset.isEmpty()) {
+                                        instance.setPresetId(preset);
+                                    }
+                                    success = downloader.installOrUpdatePack(version, pack, preset);
+                                    log("[DEBUG] installOrUpdatePack returned: " + success);
                                 } catch (Exception e) {
                                     log("Pack install error: " + e.getMessage());
+                                    e.printStackTrace();
                                     throw e;
                                 }
                                 if (success) {
@@ -796,7 +808,6 @@ public class JFXLauncher extends Application {
                         setInstallProgressWithStage("Error: " + e.getMessage(), 0, 100, "Error", 0, 1);
                     }
                 });
-                installThread.setDaemon(true);
                 installThread.start();
             } else {
                 sendJson(exchange, Map.of("success", false, "error", "Instance not found"));
@@ -1144,6 +1155,7 @@ public class JFXLauncher extends Application {
             data.put("systemBasedJvm", Config.isSystemBasedJvm());
             data.put("cpuCores", Config.getSystemCpuCores());
             data.put("totalRamMB", Config.getSystemTotalRamMB());
+            data.put("systemJvmFlags", Config.getSystemJvmFlags());
             sendJson(exchange, Map.of("success", true, "data", data));
         } catch (Exception e) {
             sendJson(exchange, Map.of("success", false, "error", e.getMessage()));
@@ -1156,7 +1168,10 @@ public class JFXLauncher extends Application {
             for (String pair : query.split("&")) {
                 String[] kv = pair.split("=");
                 if (kv.length == 2) {
-                    params.put(kv[0], kv[1]);
+                    try {
+                        params.put(URLDecoder.decode(kv[0], StandardCharsets.UTF_8),
+                                   URLDecoder.decode(kv[1], StandardCharsets.UTF_8));
+                    } catch (Exception ignored) {}
                 }
             }
         }
@@ -1408,12 +1423,11 @@ public class JFXLauncher extends Application {
     private void handleCheckUpdates(HttpExchange exchange) {
         try {
             Map<String, String> params = parseQuery(exchange.getRequestURI().getQuery());
-            String rawName = params.get("name");
-            if (rawName == null || rawName.isBlank()) {
+            String name = params.get("name");
+            if (name == null || name.isBlank()) {
                 sendJson(exchange, Map.of("success", false, "error", "Missing 'name' parameter"));
                 return;
             }
-            String name = URLDecoder.decode(rawName, StandardCharsets.UTF_8);
             Instance instance = InstanceManager.getInstance(name);
             if (instance == null) {
                 sendJson(exchange, Map.of("success", false, "error", "Instance not found"));
@@ -1425,7 +1439,12 @@ public class JFXLauncher extends Application {
             }
             PackDownloader downloader = new PackDownloader(instance);
             String packName = instance.getServerPackName();
-            int serverVersion = downloader.getPackManifest(packName).getVersion();
+            var manifest = downloader.getPackManifest(packName);
+            if (manifest == null) {
+                sendJson(exchange, Map.of("success", false, "error", "Failed to fetch pack manifest"));
+                return;
+            }
+            int serverVersion = manifest.getVersion();
             int localVersion = instance.getServerVersion();
             sendJson(exchange, Map.of(
                 "success", true,
@@ -1458,7 +1477,14 @@ public class JFXLauncher extends Application {
                 return;
             }
             PackDownloader downloader = new PackDownloader(instance);
-            boolean success = downloader.updatePack(instance.getServerPackName());
+            String packName = instance.getServerPackName();
+            String preset = instance.getPresetId();
+            boolean success;
+            if (preset != null && !preset.isEmpty()) {
+                success = downloader.updatePack(packName, preset);
+            } else {
+                success = downloader.updatePack(packName);
+            }
             if (success) {
                 sendJson(exchange, Map.of("success", true, "data", Map.of("version", instance.getServerVersion())));
             } else {

launcher/launcher/src/main/java/sashegdev/zernmc/launcher/utils/Config.java

@@ -10,8 +10,6 @@ public class Config {
     private static final Path CONFIG_DIR = Path.of(System.getProperty("user.home"), ".zernmc");
     private static final Path CONFIG_FILE = CONFIG_DIR.resolve("launcher.properties");
 
-    private static final String BUILD_PROFILE = System.getProperty("build.profile", "global");
-
     private static final Properties props = new Properties();
 
     private static volatile int maxMemory = 4096;
@@ -133,14 +131,6 @@ public class Config {
         return maxMemory;
     }
 
-    public static boolean isZernMCBuild() {
-        return "zernmc".equalsIgnoreCase(BUILD_PROFILE);
-    }
-
-    public static boolean isGlobalBuild() {
-        return !isZernMCBuild();
-    }
-
     public static void setMaxMemory(int memory) {
         if (memory < 1024) memory = 1536;
         if (memory > 32768) memory = 32768;

launcher/launcher/src/main/java/sashegdev/zernmc/launcher/utils/LauncherLogger.java

@@ -22,13 +22,13 @@ public class LauncherLogger {
         initialized = true;
 
         try {
-            Path logsDir = Paths.get(System.getProperty("user.home"), ".zernmc", "logs");
+            Path logsDir = Paths.get("").toAbsolutePath().resolve("logs");
             Files.createDirectories(logsDir);
             logFile = logsDir.resolve("launcher.log");
 
             Files.writeString(logFile,
                 "=== Launcher Log " + LocalDateTime.now().format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")) + " ===\n",
-                StandardOpenOption.CREATE, StandardOpenOption.TRUNCATE_EXISTING);
+                StandardOpenOption.CREATE, StandardOpenOption.APPEND);
 
             System.out.println("[LauncherLogger] initialized, log: " + logFile.toAbsolutePath());
         } catch (Exception e) {

launcher/launcher/src/main/java/sashegdev/zernmc/launcher/utils/ZHttpClient.java

@@ -332,12 +332,20 @@ public class ZHttpClient {
     public static void downloadFileWithSmartProxy(String url, Path target) throws Exception {
         if (!shouldUseProxyForUrl(url)) {
             try {
-                HttpRequest request = HttpRequest.newBuilder()
+                HttpRequest.Builder requestBuilder = HttpRequest.newBuilder()
                         .uri(URI.create(url))
                         .timeout(Duration.ofSeconds(40))
                         .header("User-Agent", "ZernMC-Launcher/1.0")
-                        .GET()
-                        .build();
+                        .GET();
+
+                if (url.startsWith(BASE_URL)) {
+                    String accessToken = AuthManager.getAccessToken();
+                    if (accessToken != null && !accessToken.equals("0")) {
+                        requestBuilder.header("Authorization", "Bearer " + accessToken);
+                    }
+                }
+
+                HttpRequest request = requestBuilder.build();
 
                 HttpResponse<Path> response = client.send(request, HttpResponse.BodyHandlers.ofFile(target));
 

launcher/launcher/src/resources/ui/index.html

@@ -103,6 +103,9 @@
                         <div class="sidebar-section">
                             <div class="section-header">
                                 <span class="section-title" data-i18n="sidebar.serverPacks">Server Packs</span>
+                                <button class="btn-icon" id="add-server-pack-btn" title="Install server pack">
+                                    <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><line x1="12" y1="5" x2="12" y2="19"/><line x1="5" y1="12" x2="19" y2="12"/></svg>
+                                </button>
                             </div>
                             <div id="server-packs-list" class="pack-list"></div>
                         </div>
@@ -198,6 +201,13 @@
                             </div>
                         </div>
 
+                        <div id="inline-install-progress" class="inline-install-progress hidden">
+                            <div class="progress-track">
+                                <div class="progress-fill" id="inline-progress-fill"></div>
+                            </div>
+                            <p class="progress-label" id="inline-progress-label">Installing...</p>
+                            <p class="progress-stage hidden" id="inline-progress-stage"></p>
+                        </div>
                         <div class="play-bar" id="play-bar">
                             <div class="play-bar-info">
                                 <span id="play-bar-name">Select a pack</span>
@@ -253,6 +263,7 @@
                             <button class="admin-tab" data-atab="mods"><span data-i18n="admin.mods">Mods</span></button>
                             <button class="admin-tab" data-atab="users"><span data-i18n="admin.users">Users</span></button>
                             <button class="admin-tab" data-atab="passes"><span data-i18n="admin.passes">Passes</span></button>
+                            <button class="admin-tab" data-atab="packs"><span data-i18n="admin.packs">Packs</span></button>
                             <button class="admin-tab" data-atab="news"><span data-i18n="admin.news">News</span></button>
                         </div>
                         <div class="admin-content">
@@ -315,6 +326,13 @@
                                     <div id="admin-passes-list" class="admin-list"><div class="admin-loading">Loading...</div></div>
                                 </div>
                             </div>
+                            <!-- Packs -->
+                            <div id="atab-packs" class="admin-tab-content">
+                                <div class="admin-card">
+                                    <div class="admin-card-header"><span data-i18n="admin.packsList">Pack Management</span></div>
+                                    <div id="admin-packs-list" class="admin-list"><div class="admin-loading">Loading...</div></div>
+                                </div>
+                            </div>
                             <!-- News -->
                             <div id="atab-news" class="admin-tab-content">
                                 <div class="admin-card">
@@ -506,6 +524,12 @@
                                 <option value="">Loading...</option>
                             </select>
                         </div>
+                        <div id="preset-select-container" class="field hidden">
+                            <label data-i18n="install.preset.label">Preset (optional)</label>
+                            <select id="preset-select">
+                                <option value=""><span data-i18n="install.preset.default">Default</span></option>
+                            </select>
+                        </div>
                         <button id="install-zernmc-btn" class="btn-primary"><span data-i18n="install.downloadBtn">Download & Install</span></button>
                     </div>
 

launcher/launcher/src/resources/ui/launcher.js

@@ -163,9 +163,19 @@ const LOCALES = {
         'admin.newsCreated': 'News published!',
         'admin.newsDeleted': 'News deleted',
         'admin.newsEmpty': 'No news',
+        'admin.packs': 'Packs',
+        'admin.packsList': 'Pack Management',
+        'admin.packsEmpty': 'No packs',
+        'admin.packsToggle': 'Toggle',
+        'admin.packsDisabled': 'Disabled',
+        'admin.packsEnabled': 'Enabled',
+        'admin.packsStatus': 'Status',
         'admin.delete': 'Delete',
         'admin.loading': 'Loading...',
         'admin.error': 'Error',
+        'install.preset.label': 'Preset (optional)',
+        'install.preset.default': 'Default',
+        'pack.disabled': 'Disabled',
     },
     ru: {
         'nav.packs': 'Сборки', 'nav.news': 'Новости', 'nav.settings': 'Настройки',
@@ -329,9 +339,19 @@ const LOCALES = {
         'admin.newsCreated': 'Новость опубликована!',
         'admin.newsDeleted': 'Новость удалена',
         'admin.newsEmpty': 'Нет новостей',
+        'admin.packs': 'Сборки',
+        'admin.packsList': 'Управление сборками',
+        'admin.packsEmpty': 'Нет сборок',
+        'admin.packsToggle': 'Переключить',
+        'admin.packsDisabled': 'Отключена',
+        'admin.packsEnabled': 'Включена',
+        'admin.packsStatus': 'Статус',
         'admin.delete': 'Удалить',
         'admin.loading': 'Загрузка...',
         'admin.error': 'Ошибка',
+        'install.preset.label': 'Пресет (опционально)',
+        'install.preset.default': 'Стандартный',
+        'pack.disabled': 'Отключена',
     }
 };
 
@@ -570,6 +590,10 @@ class ZernMCLauncher {
         const r = await this.req('/packs');
         if (r.success && r.data) {
             this.state.serverPacks = r.data;
+            this.state.serverPacksMap = {};
+            r.data.forEach(function(p) {
+                app.state.serverPacksMap[p.name] = p;
+            });
         }
     }
 
@@ -584,6 +608,7 @@ class ZernMCLauncher {
         });
 
         document.getElementById('add-pack-btn').addEventListener('click', () => this.showInstallModal());
+        document.getElementById('add-server-pack-btn').addEventListener('click', () => this.showInstallModal());
         document.getElementById('close-modal-btn').addEventListener('click', () => this.hideInstallModal());
         document.querySelectorAll('.modal-tab').forEach(t => {
             t.addEventListener('click', () => this.switchInstallTab(t.dataset.tab));
@@ -673,6 +698,10 @@ class ZernMCLauncher {
         if (!this.state.instances) return;
         for (const inst of this.state.instances) {
             if (!inst.isServerPack) continue;
+            // Skip disabled packs
+            if (this.state.serverPacksMap && this.state.serverPacksMap[inst.name] && this.state.serverPacksMap[inst.name].disabled) {
+                continue;
+            }
             const r = await this.req('/check-updates?name=' + encodeURIComponent(inst.name));
             if (r.success && r.data) {
                 this.state.updateMap[inst.name] = r.data.hasUpdate;
@@ -682,6 +711,10 @@ class ZernMCLauncher {
 
     async checkUpdateForPack(inst) {
         if (!inst || !inst.isServerPack) return;
+        // Skip disabled packs
+        if (this.state.serverPacksMap && this.state.serverPacksMap[inst.name] && this.state.serverPacksMap[inst.name].disabled) {
+            return;
+        }
         const r = await this.req('/check-updates?name=' + encodeURIComponent(inst.name));
         if (r.success && r.data) {
             if (!this.state.updateMap) this.state.updateMap = {};
@@ -706,9 +739,11 @@ class ZernMCLauncher {
         this.state.instances.forEach(inst => {
             const isZern = inst.isServerPack || inst.category === 'zernmc';
             const targetList = isZern ? serverList : localList;
+            const isDisabled = this.state.serverPacksMap && this.state.serverPacksMap[inst.name] && this.state.serverPacksMap[inst.name].disabled;
 
             const el = document.createElement('div');
-            el.className = 'pack-entry' + (this.state.selectedPack && this.state.selectedPack.name === inst.name ? ' selected' : '');
+            el.className = 'pack-entry' + (this.state.selectedPack && this.state.selectedPack.name === inst.name ? ' selected' : '') + (isDisabled ? ' disabled' : '');
+            if (isDisabled) el.setAttribute('data-disabled-text', t('pack.disabled'));
             const hasUpd = this.hasUpdate(inst);
             el.innerHTML = `
                 <div class="pack-entry-icon ${isZern ? 'server' : 'local'}">
@@ -716,14 +751,16 @@ class ZernMCLauncher {
                         ? '<path d="M21 16V8a2 2 0 0 0-1-1.73l-7-4a2 2 0 0 0-2 0l-7 4A2 2 0 0 0 3 8v8a2 2 0 0 0 1 1.73l7 4a2 2 0 0 0 2 0l7-4A2 2 0 0 0 21 16z"/>'
                         : '<rect x="3" y="3" width="18" height="18" rx="2" ry="2"/><line x1="12" y1="8" x2="12" y2="16"/><line x1="8" y1="12" x2="16" y2="12"/>'
                     }</svg>
-                    ${hasUpd ? '<span class="update-badge"></span>' : ''}
+                    ${hasUpd && !isDisabled ? '<span class="update-badge"></span>' : ''}
                 </div>
                 <div class="pack-entry-info">
-                    <div class="pack-entry-name">${this.esc(inst.name)}${hasUpd ? ' <span class="update-label">' + t('pack.update') + '</span>' : ''}</div>
+                    <div class="pack-entry-name">${this.esc(inst.name)}${hasUpd && !isDisabled ? ' <span class="update-label">' + t('pack.update') + '</span>' : ''}</div>
                     <div class="pack-entry-meta">${inst.version || '?'}${inst.loaderType && inst.loaderType !== 'vanilla' ? ' \u00b7 ' + inst.loaderType : ''}</div>
                 </div>
             `;
-            el.addEventListener('click', () => this.selectPack(inst));
+            if (!isDisabled) {
+                el.addEventListener('click', () => this.selectPack(inst));
+            }
             targetList.appendChild(el);
         });
 
@@ -965,6 +1002,7 @@ class ZernMCLauncher {
         if (tab === 'users') this.adminClearUser();
         if (tab === 'passes') this.adminLoadPasses();
         if (tab === 'news') this.adminLoadNewsList();
+        if (tab === 'packs') this.adminLoadPacks();
     }
 
     // --- Clients ---
@@ -1229,6 +1267,48 @@ class ZernMCLauncher {
         }
     }
 
+    // --- Packs ---
+    async adminLoadPacks() {
+        var el = document.getElementById('admin-packs-list');
+        if (!el) return;
+        el.innerHTML = '<div class="admin-loading">' + t('admin.loading') + '</div>';
+        var r = await this.req('/admin/packs');
+        if (!r.success) {
+            el.innerHTML = '<div class="admin-empty">' + t('admin.error') + '</div>';
+            return;
+        }
+        var packs = r.packs || [];
+        if (!packs.length) {
+            el.innerHTML = '<div class="admin-empty">' + t('admin.packsEmpty') + '</div>';
+            return;
+        }
+        var html = '';
+        packs.forEach(function(p) {
+            var statusText = p.disabled ? t('admin.packsDisabled') : t('admin.packsEnabled');
+            var statusClass = p.disabled ? 'admin-pack-disabled' : 'admin-pack-enabled';
+            html += '<div class="admin-item">'
+                + '<span class="admin-item-name">' + app.esc(p.name) + '</span>'
+                + '<span class="admin-item-meta ' + statusClass + '">' + statusText + '</span>'
+                + '<div class="admin-item-actions">'
+                + '<button class="btn-secondary btn-sm" onclick="app.adminTogglePack(\'' + app.esc(p.name) + '\')">' + t('admin.packsToggle') + '</button>'
+                + '</div></div>';
+        });
+        el.innerHTML = html;
+    }
+
+    async adminTogglePack(packName) {
+        var r = await this.req('/admin/packs/' + encodeURIComponent(packName) + '/toggle', {
+            method: 'POST',
+            body: '{}'
+        });
+        if (r.success) {
+            this.toast((r.disabled ? t('admin.packsDisabled') : t('admin.packsEnabled')) + ': ' + packName, 'success');
+            this.adminLoadPacks();
+        } else {
+            this.toast(r.error || t('admin.error'), 'error');
+        }
+    }
+
     // ==================== NEWS ====================
     async loadNews() {
         const r = await this.req('/news');
@@ -1369,10 +1449,13 @@ class ZernMCLauncher {
     async showInstallModal() {
         document.getElementById('install-modal').classList.remove('hidden');
         const zernmcSel = document.getElementById('zernmc-pack-select');
+        const presetContainer = document.getElementById('preset-select-container');
+        const presetSel = document.getElementById('preset-select');
         const mcSel = document.getElementById('mc-version-select');
         if (zernmcSel) {
             zernmcSel.innerHTML = '<option>' + t('select.loading') + '</option>';
         }
+        if (presetContainer) presetContainer.classList.add('hidden');
         if (mcSel) {
             mcSel.innerHTML = '<option>' + t('select.loading') + '</option>';
         }
@@ -1384,11 +1467,35 @@ class ZernMCLauncher {
                     zernmcSel.innerHTML = '<option value="">' + t('select.selectPack') + '</option>';
                     zernmcSel.disabled = false;
                     packs.data.forEach(p => {
+                        if (p.disabled) return; // skip disabled packs
                         const o = document.createElement('option');
                         o.value = p.name;
+                        o.dataset.presets = JSON.stringify(p.presets || []);
                         o.textContent = (p.displayName || p.name) + ' (' + (p.version || '') + ')';
                         zernmcSel.appendChild(o);
                     });
+                    // Update preset selector when pack changes
+                    zernmcSel.onchange = function() {
+                        const selected = zernmcSel.options[zernmcSel.selectedIndex];
+                        const presets = selected && selected.dataset.presets ? JSON.parse(selected.dataset.presets) : [];
+                        if (presetSel) {
+                            presetSel.innerHTML = '<option value="">' + t('install.preset.default') + '</option>';
+                            presets.forEach(function(pr) {
+                                const o = document.createElement('option');
+                                o.value = pr;
+                                o.textContent = pr;
+                                presetSel.appendChild(o);
+                            });
+                        }
+                        if (presetContainer) {
+                            if (presets.length > 0) {
+                                presetContainer.classList.remove('hidden');
+                            } else {
+                                presetContainer.classList.add('hidden');
+                            }
+                        }
+                        app.enhanceSelects();
+                    };
                 } else {
                     zernmcSel.innerHTML = '<option value="">' + t('select.passRequired') + '</option>';
                     zernmcSel.disabled = true;
@@ -1436,7 +1543,9 @@ class ZernMCLauncher {
     hideInstallModal() {
         document.getElementById('install-modal').classList.add('hidden');
         document.getElementById('install-progress').classList.add('hidden');
-        this.stopProgressPoll();
+        if (this.progressPoller) {
+            document.getElementById('inline-install-progress').classList.remove('hidden');
+        }
     }
 
     switchInstallTab(tab) {
@@ -1584,12 +1693,16 @@ class ZernMCLauncher {
     async installZernMCPack() {
         const packName = document.getElementById('zernmc-pack-select').value;
         if (!packName) { this.toast(t('select.selectPack'), 'error'); return; }
+        const preset = document.getElementById('preset-select') ? document.getElementById('preset-select').value : '';
         // Use server pack name as instance name (no local naming)
         const instanceName = packName;
 
+        const body = { name: instanceName, version: packName, loader: 'zernmc' };
+        if (preset) body.preset = preset;
+
         const r = await this.req('/install', {
             method: 'POST',
-            body: JSON.stringify({ name: instanceName, version: packName, loader: 'zernmc' })
+            body: JSON.stringify(body)
         });
         if (r.success) {
             this.toast(t('toast.installing'), 'info');
@@ -1624,23 +1737,43 @@ class ZernMCLauncher {
         this.progressPoller = setInterval(async () => {
             const r = await this.req('/install/progress');
             if (r.success && r.data) {
-                const p = document.getElementById('install-progress');
-                p.classList.remove('hidden');
-                document.getElementById('progress-fill').style.width = (r.data.percent || 0) + '%';
-                document.getElementById('progress-label').textContent = r.data.label || 'Installing...';
-                const stageInfo = document.getElementById('progress-stage');
+                const modalP = document.getElementById('install-progress');
+                modalP.classList.remove('hidden');
+                const pct = (r.data.percent || 0) + '%';
+                const label = r.data.label || 'Installing...';
+
+                document.getElementById('progress-fill').style.width = pct;
+                document.getElementById('progress-label').textContent = label;
+
+                const inlineProgress = document.getElementById('inline-install-progress');
+                if (!inlineProgress.classList.contains('hidden')) {
+                    document.getElementById('inline-progress-fill').style.width = pct;
+                    document.getElementById('inline-progress-label').textContent = label;
+                    const inlineStage = document.getElementById('inline-progress-stage');
+                    if (r.data.stageName && r.data.stageCount > 1) {
+                        inlineStage.textContent = tr('install.step', null, {current: String(r.data.stageIndex || 0), total: String(r.data.stageCount), name: r.data.stageName});
+                        inlineStage.classList.remove('hidden');
+                    } else {
+                        inlineStage.classList.add('hidden');
+                    }
+                }
+
+                const modalStage = document.getElementById('progress-stage');
                 if (r.data.stageName && r.data.stageCount > 1) {
-                    stageInfo.textContent = tr('install.step', null, {current: String(r.data.stageIndex || 0), total: String(r.data.stageCount), name: r.data.stageName});
-                    stageInfo.classList.remove('hidden');
+                    modalStage.textContent = tr('install.step', null, {current: String(r.data.stageIndex || 0), total: String(r.data.stageCount), name: r.data.stageName});
+                    modalStage.classList.remove('hidden');
                 } else {
-                    stageInfo.classList.add('hidden');
+                    modalStage.classList.add('hidden');
                 }
                 if (!r.data.inProgress) {
                     this.stopProgressPoll();
                     this.hideInstallModal();
+                    inlineProgress.classList.add('hidden');
                     var failed = r.data.stageName === 'Failed' || r.data.stageName === 'Error' || (r.data.label && r.data.label.startsWith('Error'));
                     this.toast(failed ? (r.data.label || t('toast.installFailed')) : t('toast.installComplete'), failed ? 'error' : 'success');
-                    if (!failed) await this.loadInstances();
+                    if (!failed) {
+                        await this.loadInstances();
+                    }
                 }
             }
         }, 500);

launcher/launcher/src/resources/ui/style.css

@@ -620,6 +620,7 @@ body {
 .select-wrap select:focus { border-color: var(--accent); }
 
 .install-progress { padding-top: 16px; border-top: 1px solid var(--border); }
+.inline-install-progress { padding: 16px 20px; border-top: 1px solid var(--border); background: var(--bg-surface); }
 .progress-track {
     height: 6px; background: var(--bg-surface); border-radius: 3px; overflow: hidden;
 }
@@ -881,3 +882,8 @@ body {
 .admin-news-info { flex: 1; min-width: 0; }
 .admin-news-title { font-size: 13px; font-weight: 500; }
 .admin-news-meta { font-size: 11px; color: var(--text-muted); margin-top: 2px; }
+
+.pack-entry.disabled { opacity: 0.5; pointer-events: none; }
+.pack-entry.disabled .pack-entry-name::after { content: ' (' attr(data-disabled-text) ')'; color: var(--error); font-size: 11px; }
+.admin-pack-disabled { color: var(--error) !important; font-weight: 600; }
+.admin-pack-enabled { color: var(--success) !important; font-weight: 600; }

launcher/pom.xml

@@ -72,31 +72,31 @@
             <dependency>
                 <groupId>org.openjfx</groupId>
                 <artifactId>javafx-controls</artifactId>
-                <version>21</version>
+                <version>23</version>
                 <classifier>win</classifier>
             </dependency>
             <dependency>
                 <groupId>org.openjfx</groupId>
                 <artifactId>javafx-web</artifactId>
-                <version>21</version>
+                <version>23</version>
                 <classifier>win</classifier>
             </dependency>
             <dependency>
                 <groupId>org.openjfx</groupId>
                 <artifactId>javafx-graphics</artifactId>
-                <version>21</version>
+                <version>23</version>
                 <classifier>win</classifier>
             </dependency>
             <dependency>
                 <groupId>org.openjfx</groupId>
                 <artifactId>javafx-base</artifactId>
-                <version>21</version>
+                <version>23</version>
                 <classifier>win</classifier>
             </dependency>
             <dependency>
                 <groupId>org.openjfx</groupId>
                 <artifactId>javafx-media</artifactId>
-                <version>21</version>
+                <version>23</version>
                 <classifier>win</classifier>
             </dependency>
         </dependencies>
@@ -142,27 +142,14 @@
         </plugins>
     </build>
     <profiles>
-        <!-- ==================== GLOBAL ==================== -->
         <profile>
             <id>global</id>
             <activation>
                 <activeByDefault>true</activeByDefault>
             </activation>
             <properties>
-                <build.profile>global</build.profile>
                 <launcher.title>ZernMC Launcher</launcher.title>
                 <server.url>http://87.120.187.36:1582</server.url>
-                <!-- Можно добавить флаги для отключения некоторых фич -->
-            </properties>
-        </profile>
-
-        <!-- ==================== ZERNMC ==================== -->
-        <profile>
-            <id>zernmc</id>
-            <properties>
-                <build.profile>zernmc</build.profile>
-                <launcher.title>ZernMC Private Launcher</launcher.title>
-                <server.url>http://87.120.187.36:1582</server.url>
             </properties>
         </profile>
     </profiles>