fix: anvil, signpost, text-version-stamp and cross-version-property-delete quality pass (#237)

* fix: anvil quality pass, a forged waist instead of a turned funnel

The waist was lofted from ellipses and read as a funnel; it is now a squared
superellipse section flaring foot to pinch to body (waist form, exit 19,
--round-waist). Dark forged steel, per-piece wood, 60 m stage, temp glb
removed.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Signed-off-by: TMHSDigital <154358121+TMHSDigital@users.noreply.github.com>

* fix: signpost quality pass, worn paint and rusted iron

No geometric defect found. Boards are cream paint worn through to the wood,
the iron is rusted instead of chrome, per-piece wood, 60 m stage, sorted
bevel input, temp glb removed.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Signed-off-by: TMHSDigital <154358121+TMHSDigital@users.noreply.github.com>

* fix: text-version-stamp presentation, the stamp on a plinth

Render path only: the numerals stand on a plinth with the caption set into
its face; the floating caption and edge glow bar are gone. Standard view.
Contract and exit codes unchanged on 4.5.11, 5.1.2 and 5.2.1.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Signed-off-by: TMHSDigital <154358121+TMHSDigital@users.noreply.github.com>

* fix: cross-version-property-delete presentation, tags hang from the stand

Render path only: the tags hang from the bar on rods instead of floating in
front of it. Contract and exit codes unchanged on 4.5.11, 5.1.2 and 5.2.1.
Also regenerates the gallery index for all four items.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Signed-off-by: TMHSDigital <154358121+TMHSDigital@users.noreply.github.com>

* docs: showcase conventions for forged sections and worn paint

From the anvil and signpost passes.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Signed-off-by: TMHSDigital <154358121+TMHSDigital@users.noreply.github.com>

---------

Signed-off-by: TMHSDigital <154358121+TMHSDigital@users.noreply.github.com>
Co-authored-by: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

Author: TMHSDigital

README.md

@@ -122,7 +122,7 @@ Budget-conformance props. Not examples. Conventions: [`showcase/README.md`](show
   <a href="showcase/cart/"><img src="showcase/cart/preview.webp" width="24%" alt="Cart: a two-wheel wooden cart with spoked wheels, slatted bed, and shafts on a dark studio floor" /></a>
   <a href="showcase/park-bench/"><img src="showcase/park-bench/preview.webp" width="24%" alt="Park bench: a wrought-iron bench with scrolled legs and wooden slats on a dark studio floor" /></a>
   <a href="showcase/wheelbarrow/"><img src="showcase/wheelbarrow/preview.webp" width="24%" alt="Wheelbarrow: a wooden tray with walls of stacked boards and iron straps, a spoked wheel, rear legs, and handles on a dark studio floor" /></a>
-  <a href="showcase/anvil/"><img src="showcase/anvil/preview.webp" width="24%" alt="Anvil: a London-pattern anvil on a hooped timber stump on a dark studio floor" /></a>
+  <a href="showcase/anvil/"><img src="showcase/anvil/preview.webp" width="24%" alt="Anvil: a dark forged-steel London-pattern anvil with a flared, squared waist on a hooped timber stump on a dark studio floor" /></a>
   <a href="showcase/water-trough/"><img src="showcase/water-trough/preview.webp" width="24%" alt="Water trough: a watertight wooden trough with plank ends, contained water, and trestle legs on a dark studio floor" /></a>
   <a href="showcase/hitching-post/"><img src="showcase/hitching-post/preview.webp" width="24%" alt="Hitching post: a square timber post with a pyramidal cap, cross-arm, iron bands wrapped around it, and two hitching rings on a dark studio floor" /></a>
   <a href="showcase/grindstone/"><img src="showcase/grindstone/preview.webp" width="24%" alt="Grindstone: a stone wheel on a timber A-frame with an iron axle, hubs, crank, and tray on a dark studio floor" /></a>
@@ -165,7 +165,7 @@ Budget-conformance props. Not examples. Conventions: [`showcase/README.md`](show
 
 [`wheelbarrow`](showcase/wheelbarrow/) — procedural wheelbarrow with board-built tray walls, a spoked wheel, iron straps, legs, and handles through the same pipeline. Falsifiers `--skip-decimate` exits 9, `--wide-seams` exits 17.
 
-[`anvil`](showcase/anvil/) — procedural London-pattern anvil on a timber stump through the same pipeline. Falsifier `--skip-decimate` exits 9.
+[`anvil`](showcase/anvil/) — procedural London-pattern anvil on a timber stump through the same pipeline. Falsifiers `--skip-decimate` exits 9, `--round-waist` exits 19.
 
 [`water-trough`](showcase/water-trough/) — procedural watertight water trough on a timber stand through the same pipeline. Falsifier `--skip-decimate` exits 9.
 
@@ -404,7 +404,7 @@ evaluated topology 1044 verts / 1028 faces.
 </tr>
 <tr>
 <td width="46%" valign="middle">
-<a href="examples/text-version-stamp/"><img src="examples/text-version-stamp/preview.webp" alt="Text version stamp: beveled brass 5.1.2 numerals standing on a dark studio floor over a glowing teal underline, with a small steel BLENDER caption above — the body text is the live bpy.app.version_string" /></a>
+<a href="examples/text-version-stamp/"><img src="examples/text-version-stamp/preview.webp" alt="Text version stamp: beveled brass version numerals standing on a dark plinth with a steel BLENDER caption set into its face — the body text is the live bpy.app.version_string" /></a>
 </td>
 <td valign="middle">
 
@@ -744,7 +744,7 @@ sources are gone, and local Z spans all three steps.
 </tr>
 <tr>
 <td width="46%" valign="middle">
-<a href="examples/cross-version-property-delete/"><img src="examples/cross-version-property-delete/preview.webp" alt="Cross-version property delete: two brass specimen tags on a dark studio stand — left tag with a cyan emissive enamel inlay (ID property kept), right tag with an empty grey pocket (ID property deleted)" /></a>
+<a href="examples/cross-version-property-delete/"><img src="examples/cross-version-property-delete/preview.webp" alt="Cross-version property delete: two brass specimen tags hanging on rods from a dark studio stand — left tag with a cyan emissive enamel inlay (ID property kept), right tag with an empty grey pocket (ID property deleted)" /></a>
 </td>
 <td valign="middle">