VS-09 Export Vertical Slice (CSV/PDF Premium Gate)

[CherryClairette]

What to build

Enable export of analysis results and enforce premium access rules. Free users should receive a clear upgrade pathway while premium users can complete export successfully with basic success and failure feedback.

Acceptance criteria

• Premium users can export at least one format successfully
• Free users are blocked from export with clear call-to-action
• Export loading, success, and failure feedback is visible
• Export behavior is tested for both free and premium roles

Blocked by

VS-08 Analysis Vertical Slice v1 (One Chart + Filter + Quota Display)