feat: batch profile image generation — generate up to 4 and pick the best

[hessius]

Summary

Allow users to generate multiple profile images at once (up to 4) and select the one they like best, rather than regenerating one at a time until satisfied.

Behaviour

1. When generating a profile image, show an option to generate 1–4 images
2. Display all generated images in a grid/carousel
3. User taps their preferred image to apply it
4. Option to regenerate individual slots or the entire batch

UX

• Default to 1 image (current behaviour) for speed
• "Generate more" button or a count selector (1/2/3/4) before generation
• Grid layout: 2×2 for 4 images, side-by-side for 2
• Selected image gets a visual highlight/checkmark
• Loading state per slot (images may complete at different times if parallelised)

Technical Considerations

• Gemini image generation supports parallel requests — fire up to 4 concurrent calls
• Consider cost/quota implications — each generation is a separate API call
• Cache all generated images so the user can switch between them without regenerating
• Works across all modes (server proxy, Capacitor)