Per-pilot mech paint: wire the color/badge/patch substitution end-to-end

- Mech::resourceNameA/B/C -> real CString members (the binary's 16-byte
  CStringRepresentation; deep-copy bind from the MakeMessage = FUN_00402a98,
  implicit member dtors) + paint-name accessors
- SetupMaterialSubstitutionList reads the real egg names ([paint] log);
  TearDown clears the callback first (FUN_004d11e8)
- dpl_SetMaterialNameCallback is real now (L4VIDEO registry); bgfload
  MaterialResolver::resolve() applies it to every material name -- the
  port analogue of the dpl board rewriting names at load
- MP_BHMC.EGG: color=Red -> Crimson (vehicletable has no Red; binary Fail()ed)

Verified live 2-node MP: crimson MadCat with hip hazard stripes + yellow VGL
leg emblems; white Blackhawk + emblems; replicants painted on both nodes.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

game/reconstructed/btstubs.cpp

@@ -247,17 +247,11 @@ LWord BT_GetSegmentFlags(Mech *owner)
 	return owner ? owner->simulationFlags : 0;
 }
 
-//===========================================================================//
-// Legacy libDPL material-name callback.
-//---------------------------------------------------------------------------//
-// The dpl2d_ 2D display-list API (NewDisplayList/Begin/SetColor/Circle/
-// PushMatrix/PopMatrix/MoveTo/End/Compile) was MOVED OUT of this file and
-// reimplemented over Direct3D 9 in decomp/reconstructed/dpl2d.cpp (the HUD/
-// reticle 2D layer).  Only the 3D material-name-substitution hook -- which is
-// part of the world renderer, not the 2D HUD -- remains stubbed here.
-// TODO(bring-up): wire the material substitution table (FUN_00459eb8).
-//===========================================================================//
-void dpl_SetMaterialNameCallback(char *(*)(char *))				{}
+// dpl_SetMaterialNameCallback is now REAL (per-pilot mech paint): it lives in
+// engine/MUNGA_L4/L4VIDEO.cpp next to substituteMaterial, and the BGF loader
+// (bgfload.cpp MaterialResolver::resolve) applies the installed callback to
+// every material name -- the port analogue of the dpl board rewriting names
+// at dpl_LoadObject time (FUN_0049664c / FUN_00459eb8).
 
 //===========================================================================//
 // BTL4VideoRenderer helper methods whose bodies were not reconstructed.