feat: add GLM-5 model support to Z.ai provider

[roomote]

Related GitHub Issue

N/A - Model addition

Description

Adds GLM-5 model support to the Z.ai provider with a 202,752 token context window.

Changes:

• packages/types/src/providers/zai.ts: Added glm-5 to both internationalZAiModels (international pricing) and mainlandZAiModels (mainland China pricing) with 202,752 context window, 16,384 max output tokens, prompt caching support, and reasoning effort support (["disable", "medium"])
• src/api/providers/zai.ts: Generalized the thinking model detection from a hardcoded modelId === "glm-4.7" check to Array.isArray(info.supportsReasoningEffort), so any model declaring reasoning support (including GLM-5) automatically gets thinking mode via providerOptions
• src/api/providers/__tests__/zai.spec.ts: Added test cases for GLM-5 in both international and China model sections, plus a dedicated GLM-5 Thinking Mode test section verifying default-enabled thinking and explicit disable

Test Procedure

• Ran cd src && npx vitest run api/providers/__tests__/zai.spec.ts - all 31 tests pass
• All lint checks pass via turbo
• All type checks pass across all 14 packages

Pre-Submission Checklist

• Scope: Changes are focused on adding GLM-5 model support
• Self-Review: Performed thorough self-review
• Testing: Added tests for GLM-5 model in international, China, and thinking mode scenarios
• Contribution Guidelines: Read and agree to the Contributor Guidelines

Documentation Updates

• No documentation updates are required.

[roomote]

Rooviewer   See task

No issues found. The model addition follows existing patterns, the thinking-mode detection generalization is correct, and test coverage is adequate. All 31 tests pass.

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