feat(cz-git): enhance OpenAI API integration with streaming support

[Zhengqbbb]

Related ISSUE

Input follow ISSUE URL address

link: #250, #248

Type Of Change

• 🐞 Bug fix (non-breaking change which fixes an issue)
• ✨ New feature (non-breaking change which adds functionality)
• 📝 Document (This change requires a documentation update)
• 🎨 Theme style (Theme style beautification)
• ⚠ Breaking change (fix or feature that would cause existing functionality to not work as expected)
• 🔨 Workflow (Workflow changes)

Clear Describe

• Add support for thinking models
• Introduced streaming capabilities for OpenAI API responses
• Updated timeout settings for API requests to accommodate longer response times.
• Adjusted maximum token limits for AI completions to improve output quality.

Test Case

• GitHub model
• DeepSeek
• OpenRouter

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Note

Medium Risk
Switches AI commit-subject generation from non-streaming JSON responses to SSE streaming parsing, which changes request/response handling and could affect provider compatibility or error cases. Also updates pnpm/workspace configuration, which may impact installs/hoisting across environments.

Overview
AI integration now uses streaming responses. fetchOpenAIMessage switches chat/completions calls to stream: true, raises max_tokens to 4096, extends request timeout to 60s, and adds SSE parsing via new shared/utils/stream.ts to assemble subjects (including multi-choice n).

Repo/tooling config cleanup. Bumps pnpm from 9.11.0 to 10.33.2, moves pnpm settings (hoisting, shell emulator, overrides, peer rules) from package.json/.npmrc into pnpm-workspace.yaml, and updates the lockfile accordingly.

Docs/minor regen changes. Updates DeepSeek example model to deepseek-v4-flash (EN/ZH) and refreshes generated VitePress components typings.

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