cli: rephrase @git branch with no local counterpart as "deleted"

Since forgotten branches are now removed at all, the only situation where @git
branch persists is that the branch got removed but is not exported yet.

cli/src/commands/branch.rs

@@ -403,10 +403,8 @@ fn cmd_branch_list(
         write!(formatter.labeled("branch"), "{name}")?;
         if branch_target.local_target.is_present() {
             print_branch_target(formatter, &branch_target.local_target)?;
-        } else if found_non_git_remote {
-            writeln!(formatter, " (deleted)")?;
         } else {
-            writeln!(formatter, " (forgotten)")?;
+            writeln!(formatter, " (deleted)")?;
         }
 
         for (remote, remote_target) in branch_target.remote_targets.iter() {

cli/tests/test_branch_command.rs

@@ -221,6 +221,30 @@ fn test_branch_delete_glob() {
     "###);
 }
 
+#[test]
+fn test_branch_delete_export() {
+    let test_env = TestEnvironment::default();
+    test_env.jj_cmd_success(test_env.env_root(), &["init", "repo", "--git"]);
+    let repo_path = test_env.env_root().join("repo");
+
+    test_env.jj_cmd_success(&repo_path, &["new"]);
+    test_env.jj_cmd_success(&repo_path, &["branch", "set", "foo"]);
+    test_env.jj_cmd_success(&repo_path, &["git", "export"]);
+
+    test_env.jj_cmd_success(&repo_path, &["branch", "delete", "foo"]);
+    let stdout = test_env.jj_cmd_success(&repo_path, &["branch", "list"]);
+    insta::assert_snapshot!(stdout, @r###"
+    foo (deleted)
+      @git: rlvkpnrz 65b6b74e (empty) (no description set)
+      (this branch will be deleted from the underlying Git repo on the next `jj git export`)
+    "###);
+
+    test_env.jj_cmd_success(&repo_path, &["git", "export"]);
+    let stdout = test_env.jj_cmd_success(&repo_path, &["branch", "list"]);
+    insta::assert_snapshot!(stdout, @r###"
+    "###);
+}
+
 #[test]
 fn test_branch_forget_export() {
     let test_env = TestEnvironment::default();