feat: gitea branch lifecycle tests

- gitea: create_branch, delete_branch, list verification on studio/sol

src/integration_test.rs

@@ -4311,6 +4311,29 @@ mod gitea_sdk_tests {
         assert_eq!(org.username, "studio");
     }
 
+    #[tokio::test]
+    async fn test_branch_create_and_delete() {
+        let Some(gitea) = dev_gitea().await else { eprintln!("Skipping: no Gitea+OpenBao"); return; };
+
+        let branch_name = format!("test-branch-{}", &uuid::Uuid::new_v4().to_string()[..8]);
+
+        // Create a branch on studio/sol (mirrored from real repo, has commits)
+        let branch = gitea.create_branch("sol", "studio", "sol", &branch_name, None).await.unwrap();
+        assert_eq!(branch.name, branch_name);
+
+        // List branches — should include our new branch
+        let branches = gitea.list_branches("sol", "studio", "sol").await.unwrap();
+        assert!(branches.iter().any(|b| b.name == branch_name));
+
+        // Delete branch
+        gitea.delete_branch("sol", "studio", "sol", &branch_name).await.unwrap();
+
+        // Verify deleted
+        let branches = gitea.list_branches("sol", "studio", "sol").await.unwrap();
+        assert!(!branches.iter().any(|b| b.name == branch_name),
+            "Branch should be deleted");
+    }
+
     #[tokio::test]
     async fn test_create_and_close_issue() {
         let Some(gitea) = dev_gitea().await else { eprintln!("Skipping: no Gitea+OpenBao"); return; };