Fix PTT voice: switch from broken batch mode to live

[kodjima33]

Summary

• Batch mode PTT was re-introduced broken by the March 29 automated sync (9126906) which reverted the March 6 fix (e80ec70)
• The IOProc captures audio but batchAudioBuffer stays empty, causing "no audio recorded" 100% of the time
• Changes default from .batch to .live which works correctly

Test plan

• Press PTT shortcut, speak, release — should transcribe and send query
• Verify floating bar shows live transcript while speaking

🤖 Generated with Claude Code

[greptile-apps]

Greptile Summary

This PR restores the correct default PTT transcription mode to .live, fixing a regression introduced by an automated sync on March 29 that reverted the March 6 fix. The one-line change only affects users who have never explicitly selected a transcription mode (no shortcut_pttTranscriptionMode entry in UserDefaults); users with a saved Batch preference continue to use batch mode unchanged.

Confidence Score: 5/5

Safe to merge — single-line targeted fix restoring the correct default for a broken feature

The change is a one-line fix to restore the intended default, backed by clear regression history. No P0 or P1 issues exist. Existing user preferences are correctly preserved by the UserDefaults guard that runs before the default is applied, and Swift's init semantics mean didSet does not fire during init so no spurious UserDefaults writes occurred on the broken default.

No files require special attention

Important Files Changed

Filename	Overview
desktop/Desktop/Sources/FloatingControlBar/ShortcutSettings.swift	Changes default PTTTranscriptionMode from .batch (broken, batchAudioBuffer always empty) to .live; existing saved UserDefaults preferences are unaffected

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[App Init / ShortcutSettings.init] --> B{UserDefaults has\nshortcut_pttTranscriptionMode?}
    B -- Yes --> C[Load saved mode\n.live or .batch]
    B -- No --> D[Use hardcoded default\nPREVIOUS: .batch BROKEN\nFIXED: .live WORKS]
    C --> E[pttTranscriptionMode set]
    D --> E
    E --> F{Mode?}
    F -- .live --> G[Real-time transcription\nwhile speaking ✅]
    F -- .batch --> H[batchAudioBuffer stays empty\nno audio recorded ❌]

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_{Reviews (1): Last reviewed commit: "Fix PTT voice recording: switch default ..." | Re-trigger Greptile}