SYSTEM_PROMPT collapses all paragraph breaks into a run-on string

[arpan7sarkar]

Problem

Lines within the same paragraph are currently joined incorrectly, which can introduce unwanted line breaks in the output.

Expected behavior

For each paragraph:

1. Join all lines within the paragraph using a single space.
2. Join separate paragraphs using \n\n.

For example:

Line one
Line two

Next paragraph
continues here

should become:

Line one Line two

Next paragraph continues here

Fix

Update the text-processing logic to:

• join each paragraph's lines with " "
• join the resulting paragraphs with "\n\n"