* test: failing repro for nested-clip * fix: stack clip regions so nested clips restore the parent rect Clip state was a single rect, so closing an inner clip turned clipping off entirely and later siblings leaked past the outer bounds. Replace it with a fixed-depth stack: SCISSOR_START pushes intersect(parent, child) and SCISSOR_END pops, restoring the parent rect while the stack is non-empty. The active top mirrors into the existing clipx/clipy/clipw/cliph scalars, so setcell is unchanged. Fixes #77 * test: move nested-clip regression into test/clip.test.ts * 🌆 Use visual language for clipping tests * 📝 Update render spec to include clipping behavior * fix: honor clip depth limit --------- Co-authored-by: Charles Lowell <cowboyd@frontside.com>