Add webhook text length stuff

tests/test_git_backup.py

@@ -508,6 +508,26 @@ def test_post_set_global_screenshot_layout_triggers_backup(monkeypatch: pytest.M
         assert "Set global screenshot layout to mobile" in commit_message
 
 
+def test_post_set_global_webhook_text_length_limit_triggers_backup(
+    monkeypatch: pytest.MonkeyPatch,
+    tmp_path: Path,
+) -> None:
+    """Posting to /set_global_webhook_text_length_limit should trigger a git backup."""
+    backup_path: Path = tmp_path / "backup"
+    monkeypatch.setenv("GIT_BACKUP_PATH", str(backup_path))
+    monkeypatch.delenv("GIT_BACKUP_REMOTE", raising=False)
+
+    with patch("discord_rss_bot.main.commit_state_change") as mock_commit:
+        response = client.post(url="/set_global_webhook_text_length_limit", data={"text_length_limit": "2500"})
+        assert response.status_code == 200, f"Failed to set global webhook text length limit: {response.text}"
+        mock_commit.assert_called_once()
+
+        call_args = mock_commit.call_args
+        assert call_args is not None
+        commit_message: str = call_args[0][1]
+        assert "Set global webhook text length limit to 2500" in commit_message
+
+
 def test_post_custom_message_triggers_backup(monkeypatch: pytest.MonkeyPatch, tmp_path: Path) -> None:
     """Posting to /custom should trigger a git backup."""
     backup_path: Path = tmp_path / "backup"