Introduces a `DlcAlertModal` component and integrates it into the `Dashboard` page. The modal is conditionally displayed for non-admin users based on DLC expiration status, with logic to handle snoozing and auto-dismissal. Updates are also reflected in database backup files.
Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 1e4433b5-47ab-464c-b663-fea2e53367dd
Replit-Commit-Checkpoint-Type: intermediate_checkpoint
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