Refactors useAuth hook with type assertion for isAdmin and isSuperAdmin properties. Updates AdminPage component to use type assertion for user's first and last names. Modifies VideoManagement component to use a more robust async query function for fetching videos, including proper JSON parsing. Updates EditVideoDialog component to use a cleaner mutation function for updating video data.
Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 170e18f0-0f13-4eca-8643-546bba1dd8cc
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/8cc42625-c1f5-4e43-99bd-77f2c4dedee2/170e18f0-0f13-4eca-8643-546bba1dd8cc/e8Bo3CR
