Add tests for history command output states

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Task summary

Add coverage for history command output in key states: no config, no history entries, and with existing history entries.

Why this is a good first issue

The command behavior is deterministic and user-visible, making this a good test-focused starter task.

Suggested files or areas

• src/commands/history.ts
• New test file in tests/ (e.g., history-command.test.mjs)

Acceptance criteria

• Add a test for the "No configuration found" path.
• Add a test for the "No commit history yet" path.
• Add a test for profile + recent commits rendering when entries exist.
• Ensure tests are stable across environments (date formatting considerations).

Extra context

There is strong coverage for suggest and prompt parsing, but command-level output checks for history are currently thin.