Drafts with better tone of voice

Improve the tone of voice of the Drafts feature to better align with the platform and sound like native content.

Possible directions for improvement:

• Match my voice. Learn tone from my existing posts/history instead of defaulting to a generic register.

• Calibrate per platform. A Reddit comment and a LinkedIn post shouldn't read the same way.

• Learn from existing social content. Analyze existing Reddit/LinkedIn content for tone of voice and overall structure.