RTF transcript export with AI-generated content produces corrupted characters

Description:

When exporting a transcript as RTF from the Mac desktop app, any AI-generated content (for example, from Add Chapters) that includes smart punctuation results in corrupted characters in standard editors.

Steps to Reproduce:

1. Open Descript (Mac desktop).

2. Generate or edit a transcript using an AI tool (e.g., Add Chapters).

3. Export transcript → RTF.

4. Open the exported RTF in macOS TextEdit or Microsoft Word.

Expected Result:

All punctuation (curly quotes, non-breaking hyphens, en/em dashes) displays correctly.

Actual Result:

Unicode typography characters appear as garbled text (mojibake), for example:

• Curly single quote (‘) → ‘

• Curly single quote (’) → ’

• Non-breaking hyphen (‑) → ‑

ASCII characters (straight quotes, standard hyphens) display correctly.

Additional Notes:

• Exporting the same transcript as Markdown (.md) or DOCX does not reproduce this issue, indicating a problem in the RTF export encoding or Unicode handling in Descript.

• This occurs immediately upon opening the RTF; no copying or pasting is involved.

Environment:

• Descript Mac desktop app (latest version)

• macOS [insert version]

• Test editors: TextEdit, Microsoft Word

Impact:

Breaks transcripts that contain AI-generated content and forces manual encoding fixes, making RTF export unreliable for workflows that require Unicode-safe punctuation.