[DQT] Fix: Improve "Add Condition" Modal Warning Logic and UX

[arnav-makkar]

Brief summary of changes

• Fix Warning Logic: The "Add Condition" modal now tracks active user selection state (hasUserMadeSelection), ensuring the exit warning only appears if data was actually entered in the current session.
• Fail-Safe UX: Updated the modal to use safe defaults by making Cancel the primary and default action, positioning it first to reduce accidental confirmation.

Link(s) to related issue(s)

• Resolves [DQT] Unsafe default behavior in the “Are you sure” modal #10306