### What problem does this PR solve?

Fix: In the dark night theme, the message input box is not displayed
correctly. #6950

### Type of change


- [x] New Feature (non-breaking change which adds functionality)

### What problem does this PR solve?

Fix: Using the Enter key does not send a complete message #6754

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

### What problem does this PR solve?

Feat: Interrupt streaming #6515
### Type of change


- [x] New Feature (non-breaking change which adds functionality)

### What problem does this PR solve?

Improves the chat interface by adding a multiline chat area that grows
when multiple lines exists.

Some images:

* Empty:
<img width="1334" alt="image"
src="https://github.com/user-attachments/assets/e8a68b46-def9-45af-b5b1-db0f0b67e6d8"
/>

* With multiple lines and documents:
<img width="1070" alt="image"
src="https://github.com/user-attachments/assets/ff976c5c-08fa-492f-9fc0-17512c95f9f2"
/>


### Type of change
- [X] New Feature (non-breaking change which adds functionality)

### What problem does this PR solve?

This pull request addresses an issue where the "Enter" key would send
the message prematurely while using Input Method Editor (IME) for text
composition. This problem occurs when users are typing with a non-Latin
input method, such as Chinese(Zhuyin), and press "Enter" to confirm
their selection, which unintentionally triggers message submission. Also
fixed the issue of blocking new submissions while waiting for a response

Before:


https://github.com/user-attachments/assets/233f3ac9-4b4b-4424-b4ab-ea2e31bb0663

After:


https://github.com/user-attachments/assets/f1c01af6-d1d7-4a79-9e81-5bdf3c0b3529

Block new submissions while waiting for a response:



https://github.com/user-attachments/assets/10a45b5f-44b9-4e36-9342-b1bbb4096312


### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

### What problem does this PR solve?
```
fixed type-script on MessageInput change to TextArea
```
_Briefly describe what this PR aims to solve. Include background context
that will help reviewers understand the purpose of the PR._

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

### What problem does this PR solve?

just resolve issue： [Improve message input handling with Shift+Enter
support](https://github.com/infiniflow/ragflow/issues/5116)
### Type of change

- [x] New Feature (non-breaking change which adds functionality)

---------

Co-authored-by: wenju.li <wenju.li@deepctr.cn>

### What problem does this PR solve?
- [x] New Feature (non-breaking change which adds functionality)

---------

Co-authored-by: Yingfeng <yingfeng.zhang@gmail.com>
Co-authored-by: Jin Hai <haijin.chn@gmail.com>

### What problem does this PR solve?

Unified API response json schema

### Type of change

- [x] Refactoring

### What problem does this PR solve?

fix: Fixed the issue of error reporting when uploading files in the chat
box #2897

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)
- [ ] New Feature (non-breaking change which adds functionality)
- [ ] Documentation Update
- [ ] Refactoring
- [ ] Performance Improvement
- [ ] Other (please describe):

### What problem does this PR solve?

fix: Fixed an issue where the first message would be displayed when
sending the second message #2625

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)
- [ ] New Feature (non-breaking change which adds functionality)
- [ ] Documentation Update
- [ ] Refactoring
- [ ] Performance Improvement
- [ ] Other (please describe):

### What problem does this PR solve?

feat: Create a conversation before uploading files in it #1880

### Type of change


- [x] New Feature (non-breaking change which adds functionality)

### What problem does this PR solve?

feat: Hide the upload button in the external agent's chat box  #1880

### Type of change


- [x] New Feature (non-breaking change which adds functionality)

### What problem does this PR solve?

feat: Delete the files uploaded in the external dialog box #1880

### Type of change


- [x] New Feature (non-breaking change which adds functionality)

### What problem does this PR solve?
feat: Add MessageInput to the external chat page #1880

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

### What problem does this PR solve?

feat: Add FileIcon #1880

### Type of change


- [x] New Feature (non-breaking change which adds functionality)

### What problem does this PR solve?

feat: Delete the file from the upload control of the message input box
#1880

### Type of change


- [x] New Feature (non-breaking change which adds functionality)

### What problem does this PR solve?

feat: Supports chatting with files/images #1880

### Type of change


- [x] New Feature (non-breaking change which adds functionality)