fix(cli): avoid return in voice cleanup finally

[l0h1nth]

Removes a return statement from a finally block in cli.py.

On Python 3.14, this emits a SyntaxWarning and fails when warnings are treated as errors. The behavior is preserved because _voice_continuous is already set to False before the auto-restart guard runs.

Tested:

• python -Werror::SyntaxWarning -m py_compile cli.py
• python -m compileall -q cli.py

[alt-glitch]

Duplicate of #21100 (and #21261, #23709). Same fix: remove return-in-finally in voice cleanup for Python 3.14+ SyntaxWarning. Issue tracked at #21088.

[teknium1]

Thanks for the focused fix. The premise is still present on current main: cli.py:11313 begins the cleanup finally, and cli.py:11336 returns from it. Removing that return preserves the intended stop behavior because cli.py:11333 has already set _voice_continuous = False, while the subsequent restart guard at cli.py:11344 requires that flag to be true.

Problems

• Regression coverage is missing for the three-silent-cycle threshold. tests/tools/test_voice_cli_integration.py:1251-1258 covers restart after one silent cycle, but no test verifies that the third cycle stops continuous mode without restarting.

Suggested changes

• Add a threshold regression test that invokes _voice_stop_and_transcribe() three times with silent recordings and asserts continuous mode is disabled and recording only restarted after the first two cycles.

Automated hermes-sweeper review.