Add bottom overlay pill mode

[altic-dev]

Description

Adds a compact pill-sized bottom overlay mode and refines bottom/notch processing animations so the visualizer stays smooth during final transcription. Also removes the reserved bottom-overlay preview space when live preview is disabled.

Type of Change

• 🐞 Bug fix (non-breaking change which fixes an issue)
• ✨ New feature (non-breaking change which adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to not work as expected)
• 📝 Documentation update

Related Issues

• N/A

Testing

• Tested on Intel Mac
• Tested on Apple Silicon Mac
• Tested on macOS 26.3
• Ran linter locally: swiftlint --strict --config .swiftlint.yml Sources
• Ran formatter locally: swiftformat --config .swiftformat Sources
• Built locally: sh build_incremental.sh

Notes

• Release notes updated locally under RELEASE_NOTES_1.5.13-beta.1.md; file is intentionally gitignored and not committed.
• The bottom overlay processing status text is commented out for now so the visualizer shimmer carries the processing state.

Screenshots / Video

Not included; verified with local build/install/launch.

[chatgpt-codex-connector]

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Reviewed commit: aace78d552

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[altic-dev]

@codex review

[chatgpt-codex-connector]

💡 Codex Review

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Reviewed commit: a01ae0fb01

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[chatgpt-codex-connector]

Gate release transition to overlays that will be hidden

Calling beginReleaseTransition() before branching into command handling puts the bottom overlay into its dismissing state for every non-empty transcript, but the command path returns without hiding the overlay in stopAndProcessTranscription. In bottom-overlay command sessions this leaves isBottomOverlayDismissing active (faded/offset UI and suppressed preview) until some later unrelated hide event, so the overlay can look stuck in a near-hidden state during normal command usage. Move this transition to only the flows that immediately hide the overlay, or explicitly clear dismissing state when command processing completes.

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