# BookInfo Header Overlap Fix

**Date**: 2026-03-09
**Task**: Fix BookInfo header not properly overlaying scrolled content (cover image and text fields bleeding into the header bar area).

## Problem

The BookInfo screen's header (clock, battery, "Book Info" title) was being drawn *before* content, so the book cover thumbnail and text fields could render on top of or overlap with the header when scrolling. Additionally, the initial attempt to clip the cover by reducing `maxHeight` in `drawBitmap1Bit` caused the cover to *shrink* rather than scroll behind the header, because `maxHeight` controls bitmap scaling, not clipping.

## Changes Made

### `src/activities/home/BookInfoActivity.cpp`

- **Moved header rendering after content**: `GUI.drawHeader()` is now called *after* all content (cover + fields) is drawn, not before. A `renderer.fillRect(0, 0, pageW, contentTop, false)` wipe of the header zone precedes the header draw, ensuring any content that scrolled into the header region is cleared before the header paints on top.
- **Removed incorrect cover clipping**: The cover bitmap is now drawn at its natural scrolled `y` position with full `coverDisplayWidth` and `coverDisplayHeight` (no clamping of `maxHeight`). The header fill+draw handles visual clipping. This gives the correct "scroll behind the header" behavior instead of the cover appearing to shrink.

## Follow-up

None -- visual behavior confirmed acceptable by user.