Resolves#12572
## What problem does this PR solve?
The conversation list in chat sessions previously only supported
deleting conversations one by one. This was inefficient when users
needed to clean up multiple conversations. This PR adds batch delete
functionality to improve user experience.
## Type of change
- [x] New Feature (non-breaking change which adds functionality)
## Specific changes
- Add selection mode with checkboxes for conversation list
- Add batch delete functionality with custom icons
- Add internationalization support (en/zh)
- Use existing removeConversation API which supports batch deletion
## UI modification status
- Default: Show [+] and [batch delete icon]
- Selection mode: Show checkboxes, keep [+] and [select all icon]
- Items selected: Show [return icon] and [red trash icon]"
### Repair Comparison
**1.Before Repair**
<img width="982" height="1221" alt="image"
src="https://github.com/user-attachments/assets/8a80f7c0-7da6-41ec-9d1a-ac887ede96ba"
/>
**2.After Repair**
<img width="1273" height="919" alt="新增批量删除效果图"
src="https://github.com/user-attachments/assets/e179bdf3-3779-4bd5-84b6-8e24780a22ea"
/>
---
Co-authored-by: Gongzi
---------
Co-authored-by: Liu An <asiro@qq.com>
### What problem does this PR solve?
Feat: If a query variable in a data manipulation operator is deleted, a
warning message should be displayed to the user. #10427#11255
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
Fixes: Fixed some bugs #10703
- Removed S3 upload from the file upload component
- Updated the dropdown menu style on the model provider page
- Updated some model provider icons
- Fixed other style issues
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
### What problem does this PR solve?
Fixes: Fixed model provider issues and improved some features
- Removed the old login page
- Updated model provider icons
- Added RAPTOR modification range parameter
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
### What problem does this PR solve?
Feat: Replace the collapse icon #9869
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
Feat: Adjust the style of the note node #3221
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
Feat: Share agent dialog box externally #3221
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
Feat: Add SwitchForm component #3221
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
Feat: Adjust the operation cell of the table on the file management page
and dataset page #3221.
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
Feat: Using IconFont as an additional icon library #3221
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
* feat: Fixed the issue where the greeting would disappear when clicking on a new dialog
* feat: replace favicon with logo.svg
* feat: if the backend returns 401, it will jump to the login page.
* feat: unavailable llm models appear disabled
* feat: display chunk token number when category of knowledge as general
