fix : unlinked ticket panel and add priority + filtering to ticketing s…

[Ashishpatra0-0]

What this PR does

• Fixed the Ticketing System by adding the missing Feedback navigation item, making it accessible to all users.
• Added a Priority field (Low, Medium, High, Urgent) while creating tickets.
• Added status and priority filters for the Superadmin ticket review page.

Files changed

• frontend/src/components/Layout.tsx – added the Feedback navigation item.
• backend/src/db.ts – added the priority field to the Ticket interface.
• backend/src/index.ts – updated ticket creation to store priority.
• frontend/src/components/TicketSubmission.tsx – added priority selection and Superadmin filters.

Testing

• Verified the Feedback option is visible and accessible for all user roles.
• Created tickets with different priority levels and confirmed they are saved correctly.
• Verified that Superadmin can filter tickets by status and priority.