[mmporong]

Issue

Closes #1523

Description

After an app process stopped, an exception while reading the head pose could leave current_app in the stopping state. Later start and stop requests then failed until the daemon restarted.

This change logs failures from the post-stop pose handling and clears current_app in a finally block. The existing return-to-zero and sleep-pose behavior is unchanged when pose handling succeeds.

Suggested labels: bug, motors. This account does not have permission to apply labels.

Testing

• Before the source fix, test_stop_clears_current_app_when_pose_read_fails failed with RuntimeError: pose unavailable.
• python -m pytest tests/unit_tests/test_app_stop_sleep.py -vv --tb=short: 3 passed.
• Related app-manager and router unit tests: 110 passed.
• ruff check and ruff format --check: passed.
• mypy src/reachy_mini/apps/manager.py: passed.

Only the listed library tests with mocks are claimed as validation. No hardware or simulator result is claimed.

Tested on

• Reachy Mini Wireless
• Reachy Mini Lite
• MuJoCo simulation (--sim)
• Mockup simulation (--mockup-sim)
• Not applicable (e.g. docs, typo)

AI assistance

• No AI involvement
• AI helped with wording or boilerplate
• AI wrote code here, and I ran and reviewed it
• An agent produced this PR, and I have not run it myself

An AI agent generated the code and this PR description. Review responses must be written by the human author in their own words.