fix(web): merge Kilo fields into referenced config schema

[marius-kilocode]

The upstream CLI schema now uses a root $ref to $defs.Config, so sibling root-level schema keywords are ignored by JSON Schema validators. Kilo-only configuration fields were therefore reported as unknown even though they were present in the response.

Merge Kilo top-level fields, primary agents, and experimental fields into $defs.Config.properties when that referenced shape is present, while retaining the existing inline-root behavior and permission additions. The merge clones affected structures so upstream schema objects are preserved.

Add regression coverage for both schema shapes, including strict additionalProperties: false behavior and preservation of upstream agent and experimental properties.

Fixes Kilo-Org/kilocode#13140

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Executive Summary

The schema merge correctly handles both the inline-root and $ref: '#/$defs/Config' upstream shapes, cloning all affected structures so upstream objects are not mutated, with solid regression coverage for both paths.

Files Reviewed (2 files)

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

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_{Reviewed by kimi-k3 · Input: 50.3K · Output: 4.3K · Cached: 147.7K}

_{Review guidance: REVIEW.md from base branch main}