Dev mode: Add confirmation dialog for import database button

Description

In dev mode, the "Import Database" button should require a confirmation dialog with text entry to prevent accidental clicks.

Proposed Solution

Add a confirmation modal that:

1. Requires the user to type "confirm import" (case insensitive) in a text field
2. Only enables the import button when the text matches
3. Has a Cancel button to dismiss

Rationale

Importing the database is a destructive operation that replaces the local database with production data. Accidentally clicking this button could cause data loss during development.