feat(config): recognize the prompt-training model filter

[chrarnoldus]

What changed

Kilo-Org/kilocode#11158 adds a global Kilo setting named hide_prompt_training_models. Users can enable it to hide Kilo Gateway models whose providers say they may use prompts for training.

This PR adds that option to the hosted config schema served by Kilo Cloud. As a result, editors recognize the setting in kilo.json instead of reporting it as unknown, and can provide the correct boolean validation and autocomplete.

This is the schema companion to Kilo-Org/kilocode#11158; the filtering behavior itself lives in the CLI backend.

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Executive Summary

Minimal, well-structured schema extension that adds hide_prompt_training_models to the hosted config schema and covers it with a test assertion, following the established pattern for Kilo-only top-level keys.

Files Reviewed (2 files)

• apps/web/src/app/config.json/extras.ts
• apps/web/src/tests/cli-config-schema.test.ts

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