Move Kat Coder 3.5 Pro (free) into recommended models

[arimesser]

What changed

Adds the free kwaipilot/kat-coder-pro-v2.5 model to the preferredModels array in apps/web/src/lib/ai-gateway/models.ts, positioned directly below 'tencent/hy3:free'.

preferredModels is the global ordered "recommended models" list that drives model ordering in the model picker (model-combobox-options.ts), the organization providers/models page, the Slack bot model allow-list, monitored models, and the models router. Adding the entry here surfaces the free Kat Coder 3.5 Pro model in the recommended models list, immediately below "Tencent: Hy3".

Update: the model is no longer added to autoFreeModels. That array also controls auto-routing free-tier behavior (KILO_AUTO_FREE_MODEL), which is a broader change than intended for this PR. autoFreeModels has been reverted to its original state, and the model is instead added directly in preferredModels (right below the tencent/hy3:free entry that's already spread in from autoFreeModels), so only the recommended-models ordering is affected.

Why

The free version of Kat Coder 3.5 Pro was previously only registered in kiloExclusiveModels (a general free/exclusive model registry) but was not part of the curated recommended list, so it wasn't surfaced to users in the "Recommended" section of the model picker.

Testing

• Verified the change follows the existing conditional-entry pattern already used in preferredModels/autoFreeModels.
• Ran pnpm -w exec oxlint --config .oxlintrc.json apps/web/src/lib/ai-gateway/models.ts — 0 warnings/errors.
• Ran oxfmt on the file — no formatting changes needed.
• Ran tsgo --noEmit against apps/web — no errors reported for this file.
• Could not run the full models.test.ts suite: the test suite requires a reachable Postgres instance (docker is unavailable in this sandbox).

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Built for Christiaan Arnoldus by Kilo for Slack

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Executive Summary

The follow-up commit reverts the autoFreeModels entry (avoiding an unintended change to auto-routing free-tier behavior) and instead adds kat_coder_pro_v2_5_free_model directly into preferredModels, filtering the duplicate 'tencent/hy3:free' out of the spread and adding a null-filtering type guard; the logic is correct with no duplicate entries, no bugs, and no logic errors in the changed lines.

Files Reviewed (1 files)

• apps/web/src/lib/ai-gateway/models.ts

Previous Review Summary (commit d13feab)

Current summary above is authoritative. Previous snapshots are kept for context only.

Previous review (commit d13feab)

Status: No Issues Found | Recommendation: Merge

Executive Summary

The change adds kat_coder_pro_v2_5_free_model to autoFreeModels following the exact existing conditional-entry pattern used for stepfun_37_flash_free_model; no bugs, typos, or logic errors found in the changed lines.

Files Reviewed (1 files)

• apps/web/src/lib/ai-gateway/models.ts

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_{Reviewed by claude-sonnet-5 · Input: 28 · Output: 5.6K · Cached: 620K}

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

[chrarnoldus]

I'll do it manually

[chrarnoldus]

#4595 note that the thing is rate limited