Hephaestus v0.4.1

Fixed

• A frame wider or taller than 4096 px renders on the Hybrid backend. The device is asked for max_texture_dimension_2d up to 16384 rather than wgpu's 8192 default, and the rasterizer's cap on intermediate layer textures is raised to match, so a clipped panel past 4096 px no longer fails the render; past a device's own limit — on either rasterizing backend — the frame is a BackendError rather than a wgpu panic.
• A document holding a polar plot reads back. The decoder restores the projection before it attaches the axes, so a polar placement no longer panics against the not-yet-set Cartesian default; a placement that genuinely mismatches is reported as a DocumentError rather than panicking.