fix(commit): honor configured body length limit

Treat an omitted CLI option as no override so project configuration controls
body wrapping while an explicit zero continues to disable it.

Fixes #2093

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: schlotter

commitizen/commands/commit.py

@@ -38,7 +38,7 @@ class CommitArgs(TypedDict, total=False):
     edit: bool
     extra_cli_args: list[str]
     message_length_limit: int
-    body_length_limit: int
+    body_length_limit: int | None
     no_retry: bool
     signoff: bool
     write_message_to_file: Path | None
@@ -109,9 +109,9 @@ def _wrap_body(self, message: str) -> str:
         Wrap the body of the commit message to the --body-length-limit length.
         """
 
-        body_length_limit = self.arguments.get(
-            "body_length_limit", self.config.settings["body_length_limit"]
-        )
+        body_length_limit = self.arguments.get("body_length_limit")
+        if body_length_limit is None:
+            body_length_limit = self.config.settings["body_length_limit"]
         # By the contract, body_length_limit is set to 0 for no limit
         if not body_length_limit or body_length_limit <= 0:
             return message

tests/commands/test_commit_command.py

@@ -448,6 +448,35 @@ def test_commit_command_body_length_limit(
         )
 
 
+@pytest.mark.usefixtures("staging_is_clean")
+def test_commit_command_uses_configured_body_length_limit_when_cli_option_is_omitted(
+    config,
+    commit_mock,
+    mocker: MockFixture,
+):
+    config.settings["body_length_limit"] = 20
+    mocker.patch(
+        "questionary.prompt",
+        return_value={
+            "prefix": "feat",
+            "subject": "add feature",
+            "scope": "",
+            "is_breaking_change": False,
+            "body": "This body line should wrap at the configured limit",
+            "footer": "",
+        },
+    )
+
+    commands.Commit(config, {"body_length_limit": None})()
+
+    committed_message = commit_mock.call_args[0][0]
+    assert committed_message.split("\n")[2:] == [
+        "This body line",
+        "should wrap at the",
+        "configured limit",
+    ]
+
+
 @pytest.mark.usefixtures("staging_is_clean")
 def test_commit_command_body_length_limit_preserves_whitespace_only_lines(
     config,