2026: OpenSCAD robot and remote, physical joint limits, model in Unity

hardware/openscad/ rebuilds the broken Fusion models as OpenSCAD:
body (top/bottom plate, standoffs, battery bay, switch), legs (coxa
bracket, femur link, tibia, horn adapters, TPU socks, servo cables),
the whole robot, and the remote (shell, lid, Nextion 3.5", JH-D400X-R4
sticks, 18650 UPS board, IMU, Teensy 4.0, USB-C breakout). Every part
was checked by slicing against the original STEP solids; the original's
bugs are fixed and listed in PLANNING.md.

The robot now uses a hexagon leg layout (corner legs 60 deg round from
the mid legs; the corner coxa brackets need turning on their splines).
Physical limits from a collision sweep of the model are in Config.h:
per-leg coxa limits and LEG_CLEARANCE_MM 56 (a leg is 55.2 mm wide at
the joints); the sim API exports them (version 7). sim_smoke passes.

Unity loads the model (export_unity.py -> Resources/OpenScadModel,
OpenScadModel.cs builds a new rig in place of the old scene's robot).
The PCB model's mounting holes now use the exact EasyEDA grid. README
shows renders of both.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

2026-current/Hexapod_Simulation_Unity/Assets/HexapodSim/Resources/OpenScadModel/body.bytes.meta

@@ -0,0 +1,7 @@
+fileFormatVersion: 2
+guid: 119d6760b10e2d94c89d00627245b5fd
+TextScriptImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

2026-current/Hexapod_Simulation_Unity/Assets/HexapodSim/Resources/OpenScadModel/leg_left_coxa.bytes.meta

@@ -0,0 +1,7 @@
+fileFormatVersion: 2
+guid: c8b5e767dc591144899b7e32a99ceabd
+TextScriptImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

2026-current/Hexapod_Simulation_Unity/Assets/HexapodSim/Resources/OpenScadModel/leg_left_femur.bytes.meta

@@ -0,0 +1,7 @@
+fileFormatVersion: 2
+guid: 545cab1c5e6fdb6479a51faf4890b22e
+TextScriptImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

2026-current/Hexapod_Simulation_Unity/Assets/HexapodSim/Resources/OpenScadModel/leg_left_tibia.bytes.meta

@@ -0,0 +1,7 @@
+fileFormatVersion: 2
+guid: 1b15eff82e4f31d4d9ae657c556b7874
+TextScriptImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

2026-current/Hexapod_Simulation_Unity/Assets/HexapodSim/Resources/OpenScadModel/leg_right_coxa.bytes.meta

@@ -0,0 +1,7 @@
+fileFormatVersion: 2
+guid: 12b3384c18597f746a655d3d1558942e
+TextScriptImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

2026-current/Hexapod_Simulation_Unity/Assets/HexapodSim/Resources/OpenScadModel/leg_right_femur.bytes.meta

@@ -0,0 +1,7 @@
+fileFormatVersion: 2
+guid: 6215130e92405f248957c261f62f4ff7
+TextScriptImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

2026-current/Hexapod_Simulation_Unity/Assets/HexapodSim/Resources/OpenScadModel/leg_right_tibia.bytes.meta

@@ -0,0 +1,7 @@
+fileFormatVersion: 2
+guid: 853358b18f634bb438e5980191cfda74
+TextScriptImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: