pub async fn display_image(
__arg0: State<HardwareCtx>,
__arg1: Path<String>,
__arg2: Query<ImageQuery>,
headers: HeaderMap,
) -> ResponseExpand description
GET /api/hardware/display/:device_id/image?rev= — the rendered image bytes
(packed 1-bit for e-ink, RGB565, or PNG). Returns 304 when the device’s rev
matches the freshly-rendered content hash.