feat(voice): control berd-call from the menu bar

[johnmatthewtennant]

Summary

Adds a macOS menu bar to berd-call start with the call controls VCCLI's menu bar offers.

• The menu shows the call mode, a Speech Rate submenu limited to the rates the call's TTS backend and mode accept, with the current rate checked, Mute Input During TTS, Mute Microphone (⌘M), and End Call (⌘Q). It is rebuilt from the latest berd-call status, which a background thread refreshes every second so the main thread never waits on the control socket, and the icon switches to a crossed-out microphone while muted.
• Each item sends the same control request as berd-call settings or berd-call stop, so the menu and the CLI never disagree about call state.
• --no-menu-bar runs the call without it, for headless use.

Reviewer-reproducible example

berd-call start --port 5343 --stream --voice Aaron --language en-US &

A waveform icon appears in the menu bar. Choose Speech Rate → 0.5×, then Mute Microphone, then Mute Input During TTS. Afterward:

$ berd-call status --port 5343 | jq -c '{muted, rate: .session.tts.rate, policy: .session.input_during_tts.policy}'
{"muted":true,"rate":0.5,"policy":"suppress_input"}

Reopening the menu shows "Speech Rate: 0.5×" and checkmarks beside both mute items. End Call stops the call and the process exits. With berd-call start --no-menu-bar --port 5344 --voice Aaron --language en-US, the call runs and responds to berd-call status, but no menu-bar item appears.

[johnmatthewtennant]

🤖 Review dispositions at 5c5be31 (fixed in fb1084e):

• Accepted — blocking status I/O on the main thread (builderbot + idiomatic). Status now refreshes on a background thread every second; the menu and icon read the cached value.
• Accepted — rate list ignores backend limits. The Speech Rate submenu offers only rates the call accepts: Siri 0.5–2×, OpenAI/Pocket 0.75–2×, Expert-Spokesperson 0.25–1.5×.
• Accepted — title and stack reference in the PR metadata.
• Declined — drop the polling timer and dynamic icon. VCCLI's icon reflects state, so a mute icon is parity; polling now happens off the main thread.
• Declined — start entering through menu_bar::run; untyped status JSON. Structural nits; low value for this change.
• Declined — visual evidence. Testing is intentionally screenshot-free; the body has accessibility-driven text evidence.

[morgmart]

🤖 Automated code review

APPROVE: the completed static review of the exact three-dot comparison found no publishable findings or duplicates. The supplied GitHub checks completed successfully.

Deterministic publication result: 0 blocking and 0 non-blocking inline finding(s) publishable; 0 duplicate(s) suppressed; 0 blocking screenshot-evidence requirement(s) in this review body.

Pending checks: 1 check(s) are not complete.

This approval reflects the completed code review only; merge readiness remains governed by the repository's required checks.

The base branch was changed.

[morgmart]

🤖 Automated code review

COMMENT: the exact three-dot comparison has one non-blocking concurrency finding in menu action handling. Supplied GitHub evidence is structurally valid; one frontend check is still in progress, while the other reported checks have passed. Required checks independently govern merge readiness.

Deterministic publication result: 0 blocking and 1 non-blocking inline finding(s) publishable; 0 duplicate(s) suppressed; 0 blocking screenshot-evidence requirement(s) in this review body.