fix: fixed the conflict BUG between model thinking mode and line break parsing.

[MagmaBlock]

💻 变更类型 | Change Type

• [ ] feat
• [x] fix
• [ ] refactor
• [ ] perf
• [ ] style
• [ ] test
• [ ] docs
• [ ] ci
• [ ] chore
• [ ] build

🔀 变更说明 | Description of Change

Resolves the issue where line breaks in model-generated reasoning content are not parsed correctly in the current version of NextChat. After this adjustment, all reasoning mode content will be properly enclosed within Markdown blockquotes.

📝 补充信息 | Additional Information

before and after:

Co-authored-by: MrrDrr [email protected] Co-authored-by: NakanoMiku39 [email protected]

Summary by CodeRabbit

• Bug Fixes

  • Eliminated extra blank lines when entering “thinking” sections to prevent duplicated newlines.

• Style

  • Improved readability of “thinking” content: each line is now uniformly quoted with “> ” for consistent multi-line formatting.

• Other

  • No changes to normal chat rendering behavior.

[coderabbitai[bot]]

Walkthrough

Refines thinking-mode output formatting in streamWithThink within app/utils/chat.ts: conditional newline insertion before thinking blocks and consistent per-line quoting using a prefixed "> ". Removes prior special-casing of internal newlines. Adds a non-functional comment in a parse-error catch. Normal-mode logic unchanged.

Changes

Cohort / File(s)	Summary of Edits
Thinking-mode quoting in streamWithThink app/utils/chat.ts	- Insert newline before a thinking block only when remainText.length > 0 && !remainText.endsWith("\n"). - Quote thinking content by appending a standalone > line, then chunk.content with each newline replaced by \n> (uniform per-line quoting). - Remove previous \n\n split/rejoin special-case. - Add minor non-functional comment in parse-error catch. - Normal-mode handling unchanged.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Poem

I nibble lines with careful cheer,
Adding > whispers, crisp and clear;
No double hops of stray newlines,
Each thought now marches, neat in signs.
Thump-thump! The stream looks quite succinct—
A rabbit’s quote, precisely inked. 🐇✍️

[!TIP]

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