🤔 [ISSUE] - only show accessible replacement tokens

[medtaher123]

Description

Description

In the block form's message section, all possible context variables are currently shown as replacement tokens. However, not all of these variables are accessible from that specific block. The displayed replacement tokens should be limited to the context variables that are accessible within the block.

Accessible context variables include:

1. Context variables captured in previous blocks within the same conversation flow.
2. Permanent context variables, which can be accessed from any flow but may be undefined if the conversation flow that sets them hasn't been called.

Additional Requirement:

Indicate permanent context variables in the UI since they can potentially be undefined, depending on whether the conversation flow that sets them has been executed.

Reproduction steps

1. Go to visual-editor
2. Click on any Simple text block
3. Go to Messages Tab
4. See Context vars

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OS

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