Add Resume and Completion Behavior

Task

Use the stored percentage to improve the Library and Reader behavior.

Treat a book as complete when its persisted progress reaches the completion threshold used by the application.

For example:

const isComplete = percentage >= 0.98;

Keep the exact threshold centralized so the Library and Reader use the same rule.

Display a Resume action when progress exists and a Start Reading action when it does not.

When a completed book is opened again, allow the user to continue reading rather than forcing the position back to the beginning.

Test

Verify:

• a new book shows Start Reading
• a partially read book shows Resume
• progress survives reloads
• a nearly finished book becomes complete
• opening a completed book still works

Checkpoint

Readly now has a complete read/resume workflow backed by persistent book-wide progress.

Module Complete

The Reader remembers where each user stopped. Module 8 builds the annotation system on the same authenticated Book boundary.