SMLib: the prebuilt with setback-open corners and the refused-corner index

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LUXeKMoxpM7Vuv8Rb6E3K2

crates/smlib/SMLIB_PREBUILT

@@ -1,10 +1,10 @@
 # Rust target, SHA-256 of smlib-<target>.tar.gz in the release prebuilt-<SMLIB_REV> of
 # tangency-labs/smlib. Written by scripts/fetch-smlib.sh --pin; never edited by hand.
-aarch64-apple-darwin 09ce8b7cc7598f2600ab2b117b9d1a5ebfecddaad0ce21b80c731bc6671b3673
-aarch64-pc-windows-msvc e36e4810b4cfdcdcf7fae1d30f5f25313aba92668fcda68452415fb30174d4a3
-aarch64-unknown-linux-gnu 1e6d149632160bc298b3b7c43b029e4155569c8172c4e59c9b8d614ca78893e1
-i686-pc-windows-msvc 5c731edbd96e7d7b608aad755bbb0cc18c2bd90699862cf227cc3338ec22dc3b
-wasm32-unknown-unknown 9dceb0fb9b9253e231cc5b929f93924c4ee80566685302bf6bbb906988ade46e
-x86_64-apple-darwin a30676477cd12e7f9e3c98744fb6f96a27b8fcbfe6dfb2478a6c79e6dac7a29a
-x86_64-pc-windows-msvc 72f3ba519fe7a76c278cda772c00a6189c211f52d4c4c1584f7dc2da8c7fc2cb
-x86_64-unknown-linux-gnu 4c00ac33f3feb547fb151104580d56c291e7879c4773805539b0033fe27a4962
+aarch64-apple-darwin 7b53c2a5278b62c033e2755579e21ad62c406eee80d35ebd11b68c0fa15ca102
+aarch64-pc-windows-msvc b2736b3738272b90e3fd8e240185c5974cc8df6018e76042a4b951ee9c51915d
+aarch64-unknown-linux-gnu e220d61b82d9dca6fec3760d745ffcd0ccb057683aa44c6275cffbdb2d80ba6e
+i686-pc-windows-msvc 90f5513ce1e178b9a3cbdbf2148449eb5ca93b3e1e3c9f5a4b87f6d8a2edb823
+wasm32-unknown-unknown a90e958eced83c4b4413442dfeab68fdb71931b898ffd9f45a6436be2386ace8
+x86_64-apple-darwin 6f503928c3458145d35d66d9ffe7dfa433113d8eeda195cc17dbf0bb95d5128b
+x86_64-pc-windows-msvc 1486d3540cecd85192a3b5e728c5ca36995f642a2425c434a2905d6da9018e05
+x86_64-unknown-linux-gnu c61af3671f5c3aea229fd2f90a853bf2906ba58e4819b0548ced7493344ad606

crates/smlib/SMLIB_REV

@@ -1 +1 @@
-8b57e7e8ace9e7886ce9936cfe45f3ed947c4006
+5096462223a836bb478eaf161f816346399ef106