Enhancement: Export Format Options & Retry Button

[tmm22]

Overview

Two additional quality of life enhancements that would benefit all VoiceInk users:

1. Export Format Options - JSON, Plain Text, and CSV export
2. Retry Button - Visible retry in transcription history

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1. Export Format Options

Problem

Currently, transcriptions can only be exported as CSV. This limits:

• API integrations (need structured JSON)
• Quick sharing (plain text is easier)
• Programmatic access (CSV parsing is fragile)

Solution

Add format selection menu with three options:

• JSON - Structured data with full metadata, pretty-printed
• Plain Text - Human-readable with timestamps
• CSV - Maintain existing format for compatibility

Benefits

• Flexible workflows (choose format for need)
• API integrations (JSON enables programmatic access)
• Easy sharing (TXT for humans)
• Backward compatible (CSV still available)

Technical Details

• New TranscriptionExportService with multi-format support
• Menu in history view for format selection
• Complete metadata in JSON export
• Formatted duration display in TXT export

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2. Retry Button in History

Problem

Currently, retry is only available via keyboard shortcut and only works for the last transcription. This is:

• Not discoverable (users don't know it exists)
• Limited (can't retry older transcriptions)
• Inconvenient (keyboard shortcut not intuitive)

Solution

Add "Retry Transcription" to each card's context menu:

• Visible button appears on right-click
• Works with any transcription (not just last)
• Shows only when audio file exists
• Loading state prevents double-clicks
• Clear success/error notifications

Benefits

• Discoverability (visible in UI)
• Flexibility (retry any transcription)
• User-friendly (context menu is intuitive)
• Safety (validates audio file exists)

Technical Details

• Integration with existing AudioTranscriptionService
• Proper error handling for missing files/models
• Async/await with @MainActor
• Automatic clipboard copy of result

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Implementation

Complete implementation provided in PR #363:

• Production-ready source code
• Comprehensive documentation
• Step-by-step application guide
• Testing checklists

Code Quality

✅ Zero force unwraps
✅ Full error handling
✅ Proper async/await usage
✅ Memory safe (no leaks)
✅ Backward compatible

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Use Cases

Export Formats

• Data Analysis - Export to JSON, import into analytics tools
• Sharing - Export to TXT, send via email/chat
• Backup - Export to JSON with full metadata
• Compatibility - Export to CSV for existing workflows

Retry Button

• Model Comparison - Retry same audio with different models
• Quality Improvement - Retry after model update
• Correction - Re-transcribe if result was poor
• Testing - Developers testing transcription accuracy

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Related

• PR #363: Implementation with complete source and documentation
• PR #362: Initial 5 QOL improvements (recording duration, cancel button, shortcuts, logging)

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Impact: High (benefits all users)
Complexity: Low (well-scoped features)
Risk: Minimal (backward compatible, no breaking changes)
Implementation: Ready (complete code provided)