feat: support SVN auth and project credentials

- add username/password fields to project dialog and model
- pass optional auth to SVN info/status/log/diff/update/commit services
- centralize SVN CLI auth flags in SvnService and fix header text

Co-authored-by: Cursor <cursoragent@cursor.com>

src/main/java/com/svnmanager/service/UpdateService.java

@@ -25,7 +25,7 @@ public class UpdateService extends SvnService {
      * @throws InterruptedException 中断异常
      * @throws TimeoutException 超时异常
      */
-    public UpdateResult update(String workingDirectory, String revision) 
+    public UpdateResult update(String workingDirectory, String revision, String username, String password) 
             throws IOException, InterruptedException, TimeoutException {
         logger.info("更新工作副本: {}", workingDirectory);
         
@@ -34,6 +34,7 @@ public class UpdateService extends SvnService {
         }
         
         List<String> args = new ArrayList<>();
+        addAuthArgs(args, username, password);
         if (revision != null && !revision.isEmpty()) {
             args.add("-r");
             args.add(revision);
@@ -77,9 +78,14 @@ public class UpdateService extends SvnService {
      * @throws InterruptedException 中断异常
      * @throws TimeoutException 超时异常
      */
+    public UpdateResult update(String workingDirectory, String username, String password) 
+            throws IOException, InterruptedException, TimeoutException {
+        return update(workingDirectory, null, username, password);
+    }
+    
     public UpdateResult update(String workingDirectory) 
             throws IOException, InterruptedException, TimeoutException {
-        return update(workingDirectory, null);
+        return update(workingDirectory, null, null, null);
     }
     
     /**