Pinned Research & Image Library

✨ New Features

• Pinned Research Sources: Paste URLs into a draft. Bloggerly scrapes those pages and writes from the sources you picked.
• Asset Library: Upload images once, reuse them in drafts and the editor.
• Image Planning: Pick none, automatic, or plan each image slot (with a preview of what gets generated).
• Image Uploads in Chat: Drop images into draft chat and say how you want them used.

🧹 Improvements

• Research Fallbacks: If research fails, Bloggerly retries with backup providers so generation is less likely to stall.
• Clearer Generating Steps: Progress now shows a verifying step while research is checked before writing starts.