Small Fixes and Improvements

A few smaller changes that shipped this week:

• Your "Group by" choice in the ad library now persists across sessions.
• Cards can show up to 15 metrics, up from 10.
• Dropping a file into chat now works anywhere in the window, not just over the composer.
• Adding a client no longer walks you through the brand research screen.
• Meta tools now accept a campaign name where an ID is expected, so the agent doesn't stall on naming mismatches.
• Ad creatives use the modern Instagram identity, so previews match what actually runs.