Enhance the default permissions logic

src/main/java/emu/grasscutter/auth/DefaultAuthenticators.java

@@ -41,10 +41,6 @@ public final class DefaultAuthenticators {
                     responseMessage = translate("messages.dispatch.account.username_create_error");
                     Grasscutter.getLogger().info(translate("messages.dispatch.account.account_login_create_error", address));
                 } else {
-                    // Add default permissions.
-                    for (var permission : ACCOUNT.defaultPermissions)
-                        account.addPermission(permission);
-
                     // Continue with login.
                     successfulLogin = true;
 

src/main/java/emu/grasscutter/game/Account.java

 package emu.grasscutter.game;
 
 import dev.morphia.annotations.*;
-import emu.grasscutter.Grasscutter;
 import emu.grasscutter.database.DatabaseHelper;
 import emu.grasscutter.utils.Crypto;
 import emu.grasscutter.utils.Utils;
 
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Locale;
+import java.util.*;
+import java.util.stream.Stream;
 
 import org.bson.Document;
 
@@ -144,17 +142,22 @@ public class Account {
 	}
 
 	public boolean hasPermission(String permission) {
-
-		if (this.permissions.contains(permission)) return true;
 		if(this.permissions.contains("*") && this.permissions.size() == 1) return true;
 
+		// Add default permissions if it doesn't exist
+		List<String> permissions = Stream.of(this.permissions, Arrays.asList(ACCOUNT.defaultPermissions))
+				.flatMap(Collection::stream)
+				.distinct().toList();
+
+		if (permissions.contains(permission)) return true;
+
 		String[] permissionParts = permission.split("\\.");
-		for (String p : this.permissions) {
+		for (String p : permissions) {
 			if (p.startsWith("-") && permissionMatchesWildcard(p.substring(1), permissionParts)) return false;
 			if (permissionMatchesWildcard(p, permissionParts)) return true;
 		}
 
-		return this.permissions.contains("*");
+		return permissions.contains("*");
 	}
 
 	public boolean removePermission(String permission) {

src/main/java/emu/grasscutter/server/http/handlers/GachaHandler.java

@@ -32,7 +32,7 @@ public final class GachaHandler implements Router {
     private final String gachaMappings;
     
     public GachaHandler() {
-        this.gachaMappings = Utils.toFilePath(DATA("/gacha/mappings.js"));
+        this.gachaMappings = Utils.toFilePath(DATA("gacha/mappings.js"));
         if(!(new File(this.gachaMappings).exists())) {
             try {
                 Tools.createGachaMapping(this.gachaMappings);