Support reasoning for OpenRouter using OpenAI provider

[xsun2001]

💻 变更类型 | Change Type

• feat
• fix
• refactor
• perf
• style
• test
• docs
• ci
• chore
• build

🔀 变更说明 | Description of Change

• Add include_reasoning = true in chat request payload for openrouter
• Using delta.reasoning instead of delta.reasoning_content for openrouter
• Optimize reasoning display style to include all reasoning text in one single quote block

📝 补充信息 | Additional Information

Summary by CodeRabbit

• New Features

  • Chat interactions now include enriched contextual details in responses under certain conditions, providing users with extra conversational insights.

• Style

  • Improved live message formatting ensures a clearer and more consistent display during active processing, resulting in a smoother and more engaging user experience.

[vercel]

@xsun2001 is attempting to deploy a commit to the NextChat Team on Vercel.

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[coderabbitai]

Walkthrough

The changes modify two key files. In app/client/platforms/openai.ts, imports have been reorganized to include new constants and modules, and the chat method in the ChatGPTApi class now conditionally adds a reasoning flag based on the request path. In app/utils/chat.ts, the UPLOAD_URL constant has been repositioned and the streaming functions have been adjusted to prefix newlines consistently during thinking mode, refining message formatting.

Changes

File(s)	Change Summary
app/client/platforms/openai.ts	Reorganized imports (added Azure and repositioned OPENAI_BASE_URL); updated chat method to check if chatPath contains "openrouter.ai" and include include_reasoning accordingly; refined extraction and handling of reasoning in response; adjusted streamWithThink callback for new choices structure.
app/utils/chat.ts	Moved UPLOAD_URL constant; updated stream and streamWithThink functions to consistently prefix newlines with "> " during thinking mode and simplified content formatting.

Sequence Diagram(s)

sequenceDiagram
    participant C as Client
    participant A as ChatGPTApi
    participant API as ExternalAPI
    C->>A: Send chat request with chatPath
    A->>A: Check if chatPath includes "openrouter.ai"
    alt openrouter.ai detected
        A->>API: Send request with include_reasoning=true
    else
        A->>API: Send regular request
    end
    API-->>A: Return response with content & reasoning data
    A->>C: Return processed response

Loading

sequenceDiagram
    participant SP as streamWithThink
    participant MP as MessageProcessor
    participant O as Output
    SP->>MP: Receive streamed message data
    MP->>SP: Process message (prefixing newlines with "> ")
    SP->>O: Output formatted message

Loading

Poem

I'm a little rabbit, hopping through the code,
Rearranging imports on a winding road.
Chat paths checked with a keen, alert eye,
Reasoning flags set as messages fly.
With every line and every thoughtful tweak,
We dance in the rhythm—our code unique!
🥕🐇

---

📜 Recent review details

Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between b966107 and 6e082ad.

📒 Files selected for processing (2)

• app/client/platforms/openai.ts (8 hunks)
• app/utils/chat.ts (5 hunks)

🔇 Additional comments (5)

app/client/platforms/openai.ts (3)

5-7: LGTM!

The imports are well-organized and necessary for the functionality.

Also applies to: 22-24, 27-27

---

298-303: LGTM!

The changes correctly implement OpenRouter support by adding the include_reasoning flag in the request payload when using OpenRouter.

---

321-321: LGTM!

The changes correctly handle both OpenRouter and non-OpenRouter reasoning fields by conditionally selecting the appropriate field name.

Also applies to: 347-349

app/utils/chat.ts (2)

4-4: LGTM!

The UPLOAD_URL import is correctly moved and necessary for the functionality.

---

614-616: LGTM!

The changes improve the readability of reasoning text by:

• Using consistent quote block formatting with > prefix
• Properly handling newlines to maintain formatting

✨ Finishing Touches

• 📝 Generate Docstrings (Beta)

---

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