The screen was a bare <rect fill='#1A1A1A'>, so the part read as a
cut-out in the board rather than one integrated piece - which is what
the module actually is: the glass panel is bonded ON TOP of the PCB and
overhangs the 128x64 active area on every side.
Now drawn as a real panel: glass body with a lit stand-off bevel, the
active area inset within it (the canvas still lands exactly on it), the
flex tail running down to the driver, and a faint specular sheen so it
reads as a screen even while dark. Body 108 -> 118 px for the overhang.
ssd1306-render tests 9/9.
