"Session" Banner Dismissal Option

[MantisClone]

Hey team! Would love more granular control over banner dismissal behavior:

Current: dismissible: true (permanent via localStorage) or false (never)

Requested: Add session-based dismissal option

• dismissible: "session" - Banner returns on page refresh/new session
• dismissible: true - Permanent dismissal (current behavior)
• dismissible: false - Never dismissible (current behavior)

Use case: Beta docs banner where we want users to see it each session but not clutter every page during active browsing.