Talkty 1.3.5: cloud recovery and selectable backup

Cloud transcription failures no longer make your recording disappear.

• Failed cloud recordings stay encrypted on your PC, survive app restarts, and appear in Talkty with Retry and Discard controls. A new recording never replaces an older failed take.
• Choose an automatic backup model in Settings > Cloud & Prompting. Qwen3 ASR Flash is the default backup; Off and other cloud models are available. Your primary model stays unchanged.
• Temporary provider errors switch directly to a compatible backup instead of waiting and sending another request to the same busy provider. Authentication, insufficient balance, cancellation and no-speech results do not trigger a backup. Backup requests cost per use.
• Added Qwen3 ASR 1.7B as a separate cloud option. Qwen Flash keeps MP3 uploads for accuracy; MAI keeps native Opus, vocabulary hints and clean transcription.
• Retrying from Talkty copies the recovered transcript when clipboard output is enabled, without auto-pasting into an old window. The recording stays recoverable if saving history fails.
• Upgrading preserves settings, transcription history, downloaded models, recovery recordings and the optional CUDA pack.

The default Qwen Flash backup supports the catalog's 11 languages, including English, but not Croatian or Serbian. Unsupported explicit languages and identical primary/backup selections are skipped. Previously overwritten recordings cannot be recovered retroactively. No new speed or accuracy guarantee is claimed.

Validation: 143 automated tests passed locally. Full behavior and verification: https://github.com/v2matosevic/Talkty/blob/main/docs/RELEASE-1.3.5.md