Refine recording overlay controls

[IchenDEV]

Summary

• move the recording HUD to the bottom center of the active screen and keep it above the visible Dock area
• replace the oversized card with a compact, rounded recording control containing cancel, waveform, and finish actions
• align both circular action controls with the capsule end-cap centers and retain keyboard, hover, localization, and accessibility behavior
• preserve the originating target app so confirming the recording still inserts into the correct application; cancelling now discards the recording without processing
• keep processing, error, live-preview, and model-loading states visually consistent with the refined HUD

Why

The previous recording overlay was too large, visually heavy, top-aligned, and mouse-transparent. It also did not provide direct cancel or finish controls. The first compact layout centered a fixed-spacing control group, which left the circular buttons about 8 pt inward from the outer capsule end-cap centers; the final geometry now constrains those centers explicitly.

User impact

Recording now presents a lightweight bottom HUD with direct cancel and finish actions. Live transcription expands upward without shifting the bottom anchor, while non-interactive processing states return to mouse passthrough.

Validation

• swift test — 483 tests passed, 7 conditionally skipped, 0 failures
• bash scripts/build-and-run.sh --verify — app and CLI built; app signed and launched successfully
• git diff --check