[Feature] In-App Feedback/Bug Reporting for Mantle Users

Users reporting issues about Mantle itself to Mantle team within

Mantle

User Story: As a Mantle user, I want to easily report bugs or request features directly in the app with AI assistance, so that the Mantle team receives clear, structured feedback.

Use Case: User finds a bug in Mantle → Opens feedback modal → AI helps format the report → Sent to Mantle team (via Linear/Featurebase/internal system)