fix(types): add missing return type annotations

[github-actions]

Summary

Adds missing return type annotations to methods identified in the code quality report.

Changes

• Add -> None return type to pause_runner_without_blocking() in tui/core/conversation_runner.py
• Add -> None return type to __call__(), _handle_action_event(), _handle_message_event() in acp_impl/events/event.py
• Add -> None return type to handle_action_event() in acp_impl/events/shared_event_handler.py
• Add -> None return type to unstreamed_event_handler() in acp_impl/events/token_streamer.py
• Add type hint to usage parameter in _format_status_line() in acp_impl/events/utils.py

Related Issue

Addresses findings from #583

Testing

• Linting passes (make lint)
• Tests pass (make test - 1272 tests passed)

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This PR was automatically generated by the Code Quality Report workflow.

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🚀 Try this PR

uvx --python 3.12 git+https://github.com/OpenHands/OpenHands-CLI.git@fix/code-quality/add-missing-return-type-hints

[enyst]

@OpenHands send an empty commit to start CI, then monitor it for some 5 mins to see if it passes; fix till green.

[openhands-ai]

I'm on it! enyst can track my progress at all-hands.dev

[github-actions]

Coverage Report •

File	Stmts	Miss	Cover	Missing
openhands_cli/acp_impl/events
event.py	51	6	88%	75, 79, 125–126, 151–152
shared_event_handler.py	61	6	90%	120, 133, 177, 182, 184, 189
token_streamer.py	124	11	91%	148, 160, 164, 167, 172, 174, 176, 178, 243, 250, 270
utils.py	83	2	97%	80, 84
openhands_cli/tui/core
conversation_runner.py	103	39	62%	96–98, 105, 107, 118, 124, 150, 157–158, 161–163, 173, 181, 183–186, 194, 197–198, 202, 209, 213–214, 219, 221, 227–228, 233, 235, 237, 244, 247, 252, 254, 266–267
TOTAL	6641	928	86%

[openhands-ai]

Final summary:

Since my last update, there have been no additional changes to make. The work is complete.

Checklist:

• User request fully addressed
• Empty commit was created and pushed to trigger CI
• CI was monitored
• The failing check was fixed with a minimal code change
• The fix was pushed to the remote PR branch
• Latest PR checks completed successfully

Conciseness check:

• The only functional code change beyond the empty CI-trigger commit was the minimal pyright fix in openhands_cli/acp_impl/events/utils.py:
  • added TokenUsage import
  • changed _format_status_line(usage: object, ...) to _format_status_line(usage: TokenUsage, ...)
• No extraneous files or unrelated code changes were introduced.

Final status:

• Remote branch has already been updated.
• PR fix(types): add missing return type annotations #584 is green.