passages: tunnels own their floor - flat-bottomed tube + solid shell (L109, v217) - pending visual review

Owner design: flat world-horizontal floor (0.50 m corner blend), 0.75 m solid shell written only
where the host field is air (interiors union first and beat every shell), 5 m cubic mouth ramps.
Removed route support restoration, deferred support, support columns, mouth-support restoration
and their capsule checks (-5,129 / +1,641 lines). Near-ready @W12: FI 1.39 -> 0.86, TN 1.29 ->
0.90, VS 0.85 -> 0.74, SW 0.70 -> 0.76 s (more shell/skirt surface). All walk audits pass;
Clang/GCC W1/W8/W12 deterministic; fast tier PASS; Linux UE builds; 6 UE arrival traces pass.
OPEN ISSUE: open-air shell (e.g. passage 0-1, 1037-1489 m route span) shows a regular stepped
banding pattern - not merged into assembler/world until fixed/approved.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016dhxM43dnWvUu2B5Ph1iG1

Standalone/Tools/verify/baselines/owner-hash/canonical/owner-hash-floating-islands-style2-v217.baseline

@@ -0,0 +1,12 @@
+[PipelineFullDetailHash] tiles=960 density=0x91931a57a067fd92 mesh=0xa818654be89790ac payload=0x370ff80451105a39 topology=0x06e507557aa70173
+[PipelineWholeViewHash] tiles=2370 density=0x10a9ced1f1c82780 mesh=0xd66b373f5f1f29e7 payload=0xe9e3dcf76003eb6a topology=0xed76a541ebdf8703
+[PipelineLODHash] lod=0 tiles=512 density=0x2fd4c78685a43cfe mesh=0x50478cff1c1f8ca0 payload=0x54e48e57e0af26de topology=0x860c011cfdb9833a
+[PipelineLODHash] lod=1 tiles=448 density=0x4b8d9a6dcd2942ad mesh=0x17e89b7087bfe711 payload=0x2389c109eb780db6 topology=0x7eccd4cf560d0630
+[PipelineLODHash] lod=2 tiles=320 density=0xf52c8e8b17cbc844 mesh=0x5028c077393d5b6a payload=0x166fe0ffad8fe7ee topology=0xd178a7b8abf7f72a
+[PipelineLODHash] lod=3 tiles=208 density=0x2891139e358828d9 mesh=0x3e80c76107a40395 payload=0x562ed93f9084db6a topology=0x93f0f24947493a03
+[PipelineLODHash] lod=4 tiles=240 density=0xfb11591772a3d18e mesh=0xebf2baee8764591b payload=0xe491d7ac9c0061ad topology=0xd618ac33b95ce494
+[PipelineLODHash] lod=5 tiles=144 density=0x2f8b7b7fb1e67258 mesh=0x4cd508cbe97344fd payload=0x2b6e96a6050458c9 topology=0x4ff6d0eda8988573
+[PipelineLODHash] lod=6 tiles=96 density=0x0114a34c8b8d6113 mesh=0xb1fec4d01ae1fa44 payload=0x3e50cfd429b8e950 topology=0x08090c96d15c1618
+[PipelineLODHash] lod=7 tiles=96 density=0x3836ed8cfce73418 mesh=0x40bc6589c5fc1aac payload=0x677349bcae16790f topology=0x36e3aa53192e6a6b
+[PipelineLODHash] lod=8 tiles=306 density=0x144f3c1fd722708b mesh=0xef77b28bf7fd9453 payload=0xe3f47b37fcd61489 topology=0x5a3c73e295494e04
+[PipelineExactQueryHash] probes=9 density=0x7b7c50ac24ccadcc unclamped=0x7b7c50ac24ccadcc detail=0xefcba20c0c70c415 collision=0xe604823a249029bf path=direct-Core-queries

Standalone/Tools/verify/baselines/owner-hash/canonical/owner-hash-surface-world-style1-v217.baseline

@@ -0,0 +1,12 @@
+[PipelineFullDetailHash] tiles=960 density=0xace56c8f205238ad mesh=0xa9c603a1248de6b8 payload=0xea55f1f4fcc6a894 topology=0x5ea7bc78a1b678ae
+[PipelineWholeViewHash] tiles=2370 density=0x451ec18d7a6ca916 mesh=0x9032bb6a7e815169 payload=0xf8d99b0efe90a693 topology=0x871d1a10633160fa
+[PipelineLODHash] lod=0 tiles=512 density=0xcd6ab28cfa504aca mesh=0xf03dc80a669fca31 payload=0x397aded1c3d2d297 topology=0xb4a1dc84fabc1fe3
+[PipelineLODHash] lod=1 tiles=448 density=0xce6e713828b2a20a mesh=0x1cf408c25d67d18c payload=0x8a2b5d20571c997e topology=0x51cd985fe8e7d100
+[PipelineLODHash] lod=2 tiles=320 density=0x600148cbe643b155 mesh=0x3627f903d13416fd payload=0x2dd1350e704fe268 topology=0xf9b6bc363d71e191
+[PipelineLODHash] lod=3 tiles=208 density=0x78e0ec638dfea587 mesh=0x25f88e807977f548 payload=0x4a3822253c2355a6 topology=0x9b6bc448957acb86
+[PipelineLODHash] lod=4 tiles=240 density=0x0be8798407724eaf mesh=0x131c303cbbe51434 payload=0x2a90ecf0a2411ca0 topology=0xe3e054a371152e08
+[PipelineLODHash] lod=5 tiles=144 density=0xf20897ad272103a9 mesh=0x13d00b6253ae1f72 payload=0x0db3880693a962fa topology=0x462bd87a80f15e89
+[PipelineLODHash] lod=6 tiles=96 density=0xc040fcac457d6313 mesh=0x1ed132eeb718fb62 payload=0xcd0214e35577c6e3 topology=0x2c56c69e6fdcfd64
+[PipelineLODHash] lod=7 tiles=96 density=0xc2d419446355fdb8 mesh=0x4ea44452574fc84b payload=0xfd9779bedfc9ae0f topology=0x8948546e770c9b72
+[PipelineLODHash] lod=8 tiles=306 density=0x62db31696f2da831 mesh=0xd373f9e9481532fe payload=0x540a60526e0e3e46 topology=0xc725cb901e6dc335
+[PipelineExactQueryHash] probes=9 density=0xc949c4df2ce6f9d9 unclamped=0xc949c4df2ce6f9d9 detail=0x114c501e2d830d94 collision=0xe6011d3a248d4849 path=direct-Core-queries