Feature Request: Adding top and bottom offsets for better one-handed usability.

Proposal: Add a setting that allows users to shift the text toward the center of the screen at the beginning and end of each chapter. At the start of a chapter: The text should begin at the middle of the screen rather than the very top. This makes it easier to reach the first lines with your thumb to select and translate words. At the end of a chapter: Allow the user to scroll further, so the last lines end up in the center of the screen instead of sticking to the bottom edge. Why it’s needed: When reading with one hand, it is difficult to reach the very top or bottom of the display to tap a word for translation. Centering the content would solve this ergonomic issue.