Show specific guidance when Apple Intelligence is unavailable:
- Device not eligible: "iPhone 15 Pro or later required"
- Not enabled: step-by-step path + "Open Settings" button
- Model downloading: "Please wait" + "Try Again" button
- Pre-iOS 26: "Update required"
Auto re-checks availability when app returns to foreground so enabling
Apple Intelligence in Settings immediately triggers insight generation.
Adds translations for all new AI strings across de, es, fr, ja, ko, pt-BR.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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