### What problem does this PR solve?

Feat: Add StringTransform operator #3221

### Type of change


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

### What problem does this PR solve?

In web folder's prompt-editor component, when entering content for the
first time, the cursor position is abnormal and it will automatically
wrap

### Type of change

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

Co-authored-by: leonlai <owllai123456>

### What problem does this PR solve?

Fix chunk number error after re-parsing. #8503.

### Type of change

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

### What problem does this PR solve?

Feat: Displays the output variable type selected by the loop operator
#3221

### Type of change


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

### What problem does this PR solve?

- Include optional `tag_feas` field if present in request
- Add input validation for `important_kwd` and `question_kwd` to ensure
they are lists
- #8462

### Type of change

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

### What problem does this PR solve?

Feat: Customize the output variable name of the loop operator #3221

### Type of change


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

### What problem does this PR solve?

Feat: Add UserFillUpForm component #3221

### Type of change


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

### What problem does this PR solve?


### Type of change

- [x] Performance Improvement

### What problem does this PR solve?

Add MCP dashboard functionalities list_tools and test_tool.

### Type of change

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

### What problem does this PR solve?
This PR addresses an issue in the presentation parser where the
`layout_recognize` configuration was incorrectly retrieved from
`kwargs.get("layout_recognize", "DeepDOC")`. Instead, it should be
sourced from the `parser_config` parameter, specifically
`parser_config.get("layout_recognize", "DeepDOC")`.

This mismatch could cause the parser to default to the "DeepDOC" layout
recognizer, ignoring any alternative recognition method specified in the
parser configuration. As a result, PDF document parsing might use an
incorrect recognition engine.

The fix ensures the presentation parser consistently uses the
`layout_recognize` setting from `parser_config`, aligning with the
configuration access patterns used elsewhere in the codebase.

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

### What problem does this PR solve?

Feat: Allow operators inside the loop operator to reference the output
parameters of external operators #3221

### Type of change


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

### What problem does this PR solve?

Feat: Add retrieval tool #3221

### Type of change


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

### What problem does this PR solve?

This PR adds fields to the `Chunk` class to store retrieval results like
similarity scores, term similarity, vector similarity, positions, and
document type. This allows the chunk object to hold all the information
needed when returning search results from the vector database.

### Type of change

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

### What problem does this PR solve?

Previous:
- Defaulted to hardcoded model 'BAAI/bge-large-zh-v1.5@BAAI'
- Did not respect user-configured default embedding_model

Now:
- Correctly prioritizes user-configured default embedding_model

Other:
- Make embedding_model optional in CreateDatasetReq with proper None
handling
- Add default embedding model fallback in dataset update when empty
- Enhance validation utils to handle None values and string
normalization
- Update SDK default embedding model to None to match API changes
- Adjust related test cases to reflect new validation rules

### Type of change

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

### What problem does this PR solve?
[https://github.com/infiniflow/ragflow/issues/8324](url)

docker image version: v0.19.1

The `_clean_conf` function was not implemented in the `_chat` and
`chat_streamly` methods of the `GeminiChat` class, causing the error
"Unknown field for GenerationConfig: max_tokens" when the default LLM
config includes the "max_tokens" parameter.

**Buggy Code(ragflow/rag/llm/chat_model.py)**
```python
class GeminiChat(Base):
    def __init__(self, key, model_name, base_url=None, **kwargs):
        super().__init__(key, model_name, base_url=base_url, **kwargs)

        from google.generativeai import GenerativeModel, client

        client.configure(api_key=key)
        _client = client.get_default_generative_client()
        self.model_name = "models/" + model_name
        self.model = GenerativeModel(model_name=self.model_name)
        self.model._client = _client

    def _clean_conf(self, gen_conf):
        for k in list(gen_conf.keys()):
            if k not in ["temperature", "top_p"]:
                del gen_conf[k]
        return gen_conf

    def _chat(self, history, gen_conf):
        from google.generativeai.types import content_types

        system = history[0]["content"] if history and history[0]["role"] == "system" else ""
        hist = []
        for item in history:
            if item["role"] == "system":
                continue
            hist.append(deepcopy(item))
            item = hist[-1]
            if "role" in item and item["role"] == "assistant":
                item["role"] = "model"
            if "role" in item and item["role"] == "system":
                item["role"] = "user"
            if "content" in item:
                item["parts"] = item.pop("content")

        if system:
            self.model._system_instruction = content_types.to_content(system)
        response = self.model.generate_content(hist, generation_config=gen_conf)
        ans = response.text
        return ans, response.usage_metadata.total_token_count

    def chat_streamly(self, system, history, gen_conf):
        from google.generativeai.types import content_types

        if system:
            self.model._system_instruction = content_types.to_content(system)
        #❌_clean_conf was not implemented 
        for k in list(gen_conf.keys()):
            if k not in ["temperature", "top_p", "max_tokens"]:
                del gen_conf[k]
        for item in history:
            if "role" in item and item["role"] == "assistant":
                item["role"] = "model"
            if "content" in item:
                item["parts"] = item.pop("content")
        ans = ""
        try:
            response = self.model.generate_content(history, generation_config=gen_conf, stream=True)
            for resp in response:
                ans = resp.text
                yield ans

            yield response._chunks[-1].usage_metadata.total_token_count
        except Exception as e:
            yield ans + "\n**ERROR**: " + str(e)

        yield 0
```
**Implement the _clean_conf function**
```python
class GeminiChat(Base):
    def __init__(self, key, model_name, base_url=None, **kwargs):
        super().__init__(key, model_name, base_url=base_url, **kwargs)

        from google.generativeai import GenerativeModel, client

        client.configure(api_key=key)
        _client = client.get_default_generative_client()
        self.model_name = "models/" + model_name
        self.model = GenerativeModel(model_name=self.model_name)
        self.model._client = _client

    def _clean_conf(self, gen_conf):
        for k in list(gen_conf.keys()):
            if k not in ["temperature", "top_p"]:
                del gen_conf[k]
        return gen_conf

    def _chat(self, history, gen_conf):
        from google.generativeai.types import content_types
        #✅ implement _clean_conf to remove the wrong parameters
        gen_conf = self._clean_conf(gen_conf)

        system = history[0]["content"] if history and history[0]["role"] == "system" else ""
        hist = []
        for item in history:
            if item["role"] == "system":
                continue
            hist.append(deepcopy(item))
            item = hist[-1]
            if "role" in item and item["role"] == "assistant":
                item["role"] = "model"
            if "role" in item and item["role"] == "system":
                item["role"] = "user"
            if "content" in item:
                item["parts"] = item.pop("content")

        if system:
            self.model._system_instruction = content_types.to_content(system)
        response = self.model.generate_content(hist, generation_config=gen_conf)
        ans = response.text
        return ans, response.usage_metadata.total_token_count

    def chat_streamly(self, system, history, gen_conf):
        from google.generativeai.types import content_types
        #✅ implement _clean_conf to remove the wrong parameters
        gen_conf = self._clean_conf(gen_conf)

        if system:
            self.model._system_instruction = content_types.to_content(system)
        #✅Removed duplicate parameter filtering logic "for k in list(gen_conf.keys()):"
        for item in history:
            if "role" in item and item["role"] == "assistant":
                item["role"] = "model"
            if "content" in item:
                item["parts"] = item.pop("content")
        ans = ""
        try:
            response = self.model.generate_content(history, generation_config=gen_conf, stream=True)
            for resp in response:
                ans = resp.text
                yield ans

            yield response._chunks[-1].usage_metadata.total_token_count
        except Exception as e:
            yield ans + "\n**ERROR**: " + str(e)

        yield 0
```

### Type of change

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

---------

Co-authored-by: Kevin Hu <kevinhu.sh@gmail.com>

### What problem does this PR solve?

Feat: Filter the query variable drop-down box options by type #3221

### Type of change


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

### What problem does this PR solve?

Improve GraphRAG similarity sensitivity to numeric differences. #8444.

### Type of change

- [x] Refactoring

### What problem does this PR solve?

This PR fixes a typo in the variable name `succesfulFilenames`,
correcting it to `successfulFilenames`. This ensures consistency and
avoids potential errors due to the misspelled variable.

### Type of change

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

### What problem does this PR solve?
Fix: when using external components, it is impossible to specify the
port, because the variables in the `docker/.env` variable were not
referenced by `docker/service_conf.yaml.template`.

382d2d0373/docker/.env (L85)

### Type of change

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

### What problem does this PR solve?

Feat: Insert the node data of the bottom subagent into the tool array of
the head agent #3221

### Type of change


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

### What problem does this PR solve?

Using the QA chunking method with a large PDF (e.g., 300+ pages) may
lead to OOM in the ragflow-worker module.


### Type of change

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

### What problem does this PR solve?

Add MCP treamable-http transport.

### Type of change

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

### What problem does this PR solve?
https://github.com/infiniflow/ragflow/issues/8466
I go through the codes, current logic:
When do_handle_task raises an exception, handle_task will set the
progress, but for some cases do_handle_task internal will just return
but not set the right progress, at this cases the redis stream will been
acked but the task is running.

### Type of change

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

---------

Co-authored-by: Kevin Hu <kevinhu.sh@gmail.com>

### What problem does this PR solve?

Add MCP server dashboard operations.

### Type of change

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

### What problem does this PR solve?

_Briefly describe what this PR aims to solve. Include background context
that will help reviewers understand the purpose of the PR._

### Type of change

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

### What problem does this PR solve?

This PR will fix the #8271 by extending int type to float type when
there is any value out of long type range in a column.
### Type of change

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

### What problem does this PR solve?

Feat: Add IterationNode component #3221
### Type of change


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

Saving an RGBA image directly as JPEG will cause an error. If the image
is in RGBA mode, convert it to RGB mode before saving it in JPG format.

### What problem does this PR solve?

During document parsing in the knowledge base, we occasionally encounter
the error 'cannot write mode RGBA as JPEG.' This occurs because images
in RGBA mode cannot be directly saved as JPEG. They must be converted
first before saving.

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

### What problem does this PR solve?

- Add new test suite for document app with
create/list/parse/upload/remove tests
- Update API URLs to use version variable from config in HTTP and web
API tests

### Type of change

- [x] Add test cases

### What problem does this PR solve?

before refactor
1. create file record
2. Add to blob

if have some execption at 2 the system db will have a file record but
not have related blob, which will introduce some bug.

after refactor
1. add to blob
2. create file record.

if 1 success but 2 failed just have a dirty blob in blob system, user
will not feel that



### Type of change


- [x] Refactoring

### What problem does this PR solve?

Feat: Delete the agent and tool nodes downstream of the agent node #3221

### Type of change


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

### What problem does this PR solve?

image_version: v0.19.1
This PR fixes a bug in the HuggingFaceEmBedding API method that was
causing AssertionError: assert len(vects) == len(docs) during the
document embedding process.

#### Problem
The HuggingFaceEmbed.encode() method had an early return statement
inside the for loop, causing it to return after processing only the
first text input instead of processing all texts in the input list.

**Error Messenge**
```python
AssertionError: assert len(vects) == len(docs) # input chunks  != embedded  vectors from embedding api
File "/ragflow/rag/svr/task_executor.py", line 442, in embedding
```



**Buggy code(/ragflow/rag/llm/embedding_model.py)**
```python
class HuggingFaceEmbed(Base):
    def __init__(self, key, model_name, base_url=None):
        if not model_name:
            raise ValueError("Model name cannot be None")
        self.key = key
        self.model_name = model_name.split("___")[0]
        self.base_url = base_url or "http://127.0.0.1:8080"
        def encode(self, texts: list):
            embeddings = []
            for text in texts:
                response = requests.post(...)
                if response.status_code == 200:
                    try:
                        embedding = response.json()
                        embeddings.append(embedding[0])
                        # ❌ Early return
                        return np.array(embeddings), sum([num_tokens_from_string(text) for text in texts]) 
                    except Exception as _e:
                        log_exception(_e, response)
                else:
                    raise Exception(...)
```
**Fixed Code(I just Rollback this function to the v0.19.0 version)**
```python
Class HuggingFaceEmbed(Base):
    def __init__(self, key, model_name, base_url=None):
        if not model_name:
            raise ValueError("Model name cannot be None")
        self.key = key
        self.model_name = model_name.split("___")[0]
        self.base_url = base_url or "http://127.0.0.1:8080"
        def encode(self, texts: list):
            embeddings = []
            for text in texts:
                response = requests.post(...)
                if response.status_code == 200:
                    embedding = response.json()
                    embeddings.append(embedding[0])  # ✅ Only append, no return
                else:
                    raise Exception(...)
            return np.array(embeddings), sum([num_tokens_from_string(text) for text in texts])  # ✅ Return after processing all
```
### Type of change

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

### What problem does this PR solve?
Feat: Use the message_id returned by the interface as the id of the
reply message #3221

### Type of change


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

### What problem does this PR solve?

This is a cherry-pick from #7781 as requested.

### Type of change

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

Co-authored-by: Kevin Hu <kevinhu.sh@gmail.com>

### What problem does this PR solve?


### Type of change

- [x] Documentation Update

### What problem does this PR solve?

Upgrade MCP SDK to v1.9.4 (latest).

### Type of change

- [x] Refactoring

### What problem does this PR solve?

Update .env ,Defaults to the v0.19.1-slim edition

### Type of change

- [x] Other (please describe): Update .env ,Defaults to the
v0.19.1-slim edition

### What problem does this PR solve?

- Simplify AzureChat constructor by passing base_url directly
- Clean up spacing and formatting in chat_model.py
- Remove redundant parentheses and improve code consistency
- #8423

### Type of change

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

### What problem does this PR solve?

_Briefly describe what this PR aims to solve. Include background context
that will help reviewers understand the purpose of the PR._

### Type of change: Documentation Update/Refactoring

#### Summary
Adds HTTPS/SSL configuration guide/example to enable secure RAGFlow
deployments with proper certificate management.

#### Changes
- New HTTPS Setup Section: Step-by-step guide for SSL certificate
configuration
- Let's Encrypt Integration: Complete Certbot setup instructions
- Docker Configuration: Volume mapping examples for certificates

#### Key Features
- Prerequisites checklist
- Docker Compose configuration examples
- Support for both Let's Encrypt and existing certificates

#### Files Modified
- `README.md`
- `ragflow.https.conf` (new file)

### What problem does this PR solve?

Feat: The delete button is displayed only when the cursor is hovered
over the connection line #3221

### Type of change


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

**Context and Purpose:**

This PR automatically remediates a security vulnerability:
- **Description:** Detected possible formatted SQL query. Use
parameterized queries instead.
- **Rule ID:**
python.lang.security.audit.formatted-sql-query.formatted-sql-query
- **Severity:** HIGH
- **File:** rag/utils/opendal_conn.py
- **Lines Affected:** 98 - 98

This change is necessary to protect the application from potential
security risks associated with this vulnerability.

**Solution Implemented:**

The automated remediation process has applied the necessary changes to
the affected code in `rag/utils/opendal_conn.py` to resolve the
identified issue.

Please review the changes to ensure they are correct and integrate as
expected.

### What problem does this PR solve?

#8406

### Type of change

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

### What problem does this PR solve?

Feat: Solved the conflict between the Handle click and drag events of
the canvas node #3221

### Type of change


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

### What problem does this PR solve?

#8414

### Type of change

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

### What problem does this PR solve?
#8391
#8404

### Type of change

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

---------

Co-authored-by: Kevin Hu <kevinhu.sh@gmail.com>

### What problem does this PR solve?

### Type of change

- [x] Documentation Update

### What problem does this PR solve?

Feat: Add Tavily operator #3221

### Type of change


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

### What problem does this PR solve?

Fix: Fixed the issue where tag content would overflow the container
#8392
### Type of change

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

### What problem does this PR solve?

Refactor Pdf 2 Slices page to new style

### Type of change

- [X] Refactoring

### What problem does this PR solve?

Feat: Improve the tavily form #3221

### Type of change


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