Prevent double-clicking a tab from escaping an active drafting session

[yo4e]

Context

Found during real use.

While a DRAFTED session is active and the quota has not yet been completed, double-clicking a browser tab can release/bypass the drafting lock and allow the user to escape the session.

Problem

The active-session constraint is intended to keep the writer on the manuscript until the required quota is reached. A simple double-click on a tab should not provide an accidental escape hatch.

Reproduction

1. Start a DRAFTED session.
2. Leave the quota incomplete.
3. Double-click a browser tab while the session is active.
4. The session can be escaped / the enforced manuscript state is released.

Exact tab/focus mechanics can be confirmed during implementation if browser behavior differs by platform or Chrome version.

Expected behavior

• Double-clicking a tab must not dismiss or bypass an active DRAFTED session.
• Until the quota is satisfied, tab interactions should preserve the same enforcement behavior as a normal single click / attempted navigation.
• Existing intentional safety or recovery paths, if any, should remain available.
• Completing the quota should still discharge the session normally.

Acceptance criteria

• Reproduction above no longer allows leaving the active drafting session.
• No regression in normal tab switching interception / manuscript refocusing.
• No duplicate tabs or focus loops are introduced by the fix.
• TEST DRAFT NOW follows the same corrected behavior.