Harden recording flows with resilience features

[fbraza]

Summary

Harden the recording experience with background handling, error states, offline support, and transcription persistence.

Requirements

• Manage background recording transitions according to platform capabilities, updating the provider state when the app pauses or resumes.
• Add error handling around speech recognition failures and surface user-friendly messaging plus retry affordances.
• Show loading or progress indicators while speech processing or permission checks are in-flight.
• Define and implement an offline strategy (functional fallback or explicit messaging) when speech services are unavailable.
• Persist completed transcriptions locally so users can return to them after app restarts.
• Test the screen on multiple device sizes and orientations, capturing findings for the team.

Acceptance Criteria

• Recording handles app backgrounding without crashes or silent failure, updating UI state appropriately.
• Users see clear error and loading states during speech recognition interruptions.
• Offline scenarios are handled gracefully with either working functionality or explicit messaging.
• Completed transcriptions reappear after restarting the app.
• A brief QA note documents device-size/orientation testing results.