### What problem does this PR solve?
Feat: Integrate the name, avatar, and description of chat and search
into a single component.
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **New Features**
* Inline-editable avatar, name, and description fields
* Expandable content blocks in search results
* New RAGFlow heading/logo component
* **Refactor**
* Replaced scattered form fields with a composed Avatar/Name/Description
component
* Mindmap drawer converted to a sheet-based drawer and layout cleanup
* Simplified search page controls and layout; improved scroll viewport
handling
* **Chores**
* Added/updated English and Chinese localization keys (placeholders,
view more/less)
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
---------
Co-authored-by: Yingfeng <yingfeng.zhang@gmail.com>
### What problem does this PR solve?
Fix: Using AvatarUpload in a dialog and pressing Enter will cause a file
selection pop-up to appear. #13779
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
---------
Co-authored-by: Jin Hai <haijin.chn@gmail.com>
### What problem does this PR solve?
- Unify top level pages structure
- Standardize locale language codes (BCP 47) and time zones (IANA tz)
> **Note:**
> Newly created user info brings non-standard default values `timezone:
"UTC+8\tAsia/Shanghai"` and `language: "English"`.
### Type of change
- [x] Refactoring
### What problem does this PR solve?
Update **Chat** UI:
- Align to the design.
- Update `<AudioButton>` visualizer logic.
- Fix keyboard navigation issue.
### Type of change
- [x] Refactoring
### What problem does this PR solve?
Fix: Profile picture cropping supported
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
### What problem does this PR solve?
Feat: Allow users to delete their profile pictures #3221
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
Feat: Use AvatarUpload to replace the avatar settings on the dataset and
search pages #3221
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
Feat: Add AvatarUpload component #3221
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
