feat: reasoning content

[lollipopkit]

Fixes #226

Summary by Sourcery

Display reasoning steps from the AI model within chat messages.

New Features:

• Show AI reasoning in an expandable section above the main response.

Enhancements:

• Refactor Markdown rendering into a reusable widget.
• Prevent auto-scrolling if the user manually scrolls the chat.

Build:

• Update dependencies, including openai_dart, fl_lib, extended_image, file_picker, and add webdav_client_plus.

Chores:

• Add a reasoning field to the chat history data model.

[sourcery-ai]

Reviewer's Guide by Sourcery

This pull request adds support for displaying reasoning content in chat history items, updates several dependencies including switching the openai_dart package to a git reference, and makes minor adjustments to the scrolling behavior in the home page.

No diagrams generated as the changes look simple and do not need a visual representation.

File-Level Changes

Change	Details	Files
Add support for displaying reasoning content in chat history items.	Added a nullable 'reasoning' field to ChatHistoryItem. Updated Hive adapter and JSON serialization to include the 'reasoning' field. Modified ChatHistoryContentView to display reasoning content using an expandable tile. Extracted Markdown rendering logic into a new method. Updated the stream listener to handle and append reasoning content delta.	lib/data/model/chat/history/history.dart lib/data/model/chat/history/history.g.dart lib/data/model/chat/history/view.dart lib/view/page/home/req.dart lib/data/model/chat/history/history.ext.dart
Update dependencies and switch openai_dart to a git reference.	Updated extended_image and file_picker versions. Changed openai_dart dependency to a git reference. Added webdav_client_plus dependency.	pubspec.yaml pubspec.lock
Adjust scrolling logic in the home page controller.	Modified auto-scroll behavior to stop if the user has manually scrolled. Inlined the chat scroll listener definition.	lib/view/page/home/ctrl.dart lib/view/page/home/var.dart

Assessment against linked issues

Issue	Objective	Addressed	Explanation

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[sourcery-ai]

Hey @lollipopkit - I've reviewed your changes - here's some feedback:

Overall Comments:

• Extracting the markdown rendering logic into the _buildMarkdown method improves code organization.
• Consider removing the seemingly accidental 'zagu lollipopkit' text from the comment in lib/view/widget/code.dart.

Here's what I looked at during the review

• 🟢 General issues: all looks good
• 🟢 Security: all looks good
• 🟢 Testing: all looks good
• 🟢 Complexity: all looks good
• 🟢 Documentation: all looks good

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