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/InfoService.java

@@ -23,7 +23,7 @@ public class InfoService extends SvnService {
      * @throws InterruptedException 中断异常
      * @throws TimeoutException 超时异常
      */
-    public SvnInfo getInfo(String workingDirectory) 
+    public SvnInfo getInfo(String workingDirectory, String username, String password) 
             throws IOException, InterruptedException, TimeoutException {
         logger.debug("获取信息: {}", workingDirectory);
         
@@ -45,6 +45,11 @@ public class InfoService extends SvnService {
         return info;
     }
     
+    public SvnInfo getInfo(String workingDirectory)
+            throws IOException, InterruptedException, TimeoutException {
+        return getInfo(workingDirectory, null, null);
+    }
+    
     /**
      * 解析svn info输出
      *