[WIP] feat(kit): support reason_content

[hexqi]

Summary by CodeRabbit

• New Features
  • Added support for displaying incremental reasoning content from AI responses during chat streaming.
• Improvements
  • Enhanced streaming logic for more natural and variable response timing.
  • Chat messages can now include separate reasoning content alongside regular content.
• Bug Fixes
  • Improved handling of chat message content to support cases where content may be null.

[coderabbitai]

Walkthrough

The changes introduce modularized streaming logic for AI responses, supporting both main and "reasoning" content streams with variable delays. Type definitions are updated to accommodate optional and nullable reasoning content fields. The message handling logic is enhanced to append streamed reasoning content incrementally to chat messages during streaming.

Changes

File(s)	Change Summary
docs/src/public/sw.js	Refactored streaming logic by introducing delay and mockStreamData helper functions. Updated generateStreamResponse to use these helpers and support reasoning content streaming based on model name.
packages/kit/src/types.ts	Modified ChatMessage and ChatCompletionStreamResponseDelta interfaces: made content nullable and added optional reasoning_content fields.
packages/kit/src/vue/message/useMessage.ts	Updated message streaming callback to append incremental reasoning_content to the last assistant message if present in the stream delta.

Sequence Diagram(s)

sequenceDiagram
    participant Client
    participant ServiceWorker
    participant Model

    Client->>ServiceWorker: Request AI response (with model info)
    ServiceWorker->>Model: Prepare response content

    alt Model includes "reason"
        ServiceWorker->>ServiceWorker: mockStreamData(reasoning_content)
        ServiceWorker->>Client: Stream reasoning_content chunks
    end

    ServiceWorker->>ServiceWorker: mockStreamData(content)
    ServiceWorker->>Client: Stream content chunks

    ServiceWorker->>Client: Send [DONE] message and close stream

Loading

Poem

In the warren of code, some logic did grow,
Now reasoning streams with a gentle flow.
Messages gain thoughts, not just what’s said—
With chunks and with pauses, both main and thread.
Types now embrace what’s reasoned and null,
A hop of improvement, clever and subtle!
🐇✨

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📥 Commits

Reviewing files that changed from the base of the PR and between 6e3f3fb and e8435bb.

📒 Files selected for processing (3)

• docs/src/public/sw.js (1 hunks)
• packages/kit/src/types.ts (2 hunks)
• packages/kit/src/vue/message/useMessage.ts (1 hunks)

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