bug: Attaching file while writing message overwrites message

[lily-de]

Describe the bug
A clear and concise description of what the bug is.

If you append a file in the UI to a goose session, it overwrites your message to goose. We should be able to attach files and include a message to goose about what we want goose to do with that file, and if you start writing a message first then attach it should not overwrite your message

To Reproduce
Steps to reproduce the behavior:

1. Start writing a message to goose
2. Before submitting the message, click the paperclip icon and select any file
3. Message from step 1 disappears and is replaced by a path to the file selected in step 2

Expected behavior
A clear and concise description of what you expected to happen.

1. 1. Start writing a message to goose
2. Before submitting the message, click the paperclip icon and select any file
3. Message from step 1 remains and path for file selected in step 2 remains

Screenshots
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Please provide following information:

• Interface: UI
• Version: v1.0.5

Additional context
Add any other context about the problem here.