### What problem does this PR solve?

Feat: Delete the operator node and hide the corresponding sheet #3221
### Type of change


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

### What problem does this PR solve?

Feat: Click the edit tool button of the agent form to open the
corresponding form #3221

### Type of change


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

### What problem does this PR solve?

Fix: Fixed the issue that variables defined in the begin operator cannot
be referenced in the switch operator. #3221
### Type of change

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

### What problem does this PR solve?

Feat: Avoid the form sheet covering the chat sheet #3221

### Type of change


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

### 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?

Feat: Deleting the last tool of the agent will delete the tool node
#3221

### Type of change


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

### What problem does this PR solve?

Feat: Display agent operator call log #3221

### Type of change


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

### What problem does this PR solve?
Feat: Let system variables appear in operator prompts #3221

### Type of change


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

### What problem does this PR solve?

Feat: Render agent details #3221
### Type of change


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

### What problem does this PR solve?

Feat: The Begin and IterationStart operators cannot be deleted using
shortcut keys #4287

### Type of change


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

### What problem does this PR solve?

Feat: Add the iteration Node #4242

### Type of change


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