fix(dashboard): 3D views never draw a kept manifest with the game shaders

The game shader views looked up each shader's technique in the manifest's
"techniques". Property scenery manifests are cached by browsers for a day
(world ones for an hour), so after the update a browser drew the property
view from the manifest the older server had sent, which has no
techniques: every shader fell back to LEGO, whose decal texture alpha
laid the see-through tree, rock and water textures over white vertex
colors. Nimbus Isle came out with white trees, rocks and water, a yellow
build surface and a solid white build border.

- Manifest URLs carry the conversion format the views are written for
  (?format=5, scenery-core.js SCENERY_FORMAT), so a kept manifest from
  an older server is never used; SceneryCoreJs checks it matches
  Scenery.cpp FORMAT_VERSION.
- A manifest without techniques (an older server's) is drawn with the
  viewer's own lights and its textureAlpha table instead of every
  shader guessed as LEGO.
- A material whose NiAlphaController animates its alpha is drawn at its
  highest key. The AnimAlpha shaders now use the material alpha, and
  effects resting at 0 in the file (the Venture Explorer's lightning)
  had vanished. Conversion format 5.

Checked by rendering the world view of every zone with models and the
property view of every property template (headless, fixed cameras)
before and after, and the Nimbus Isle property with a manifest stripped
of its techniques, which reproduced the white look.

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

docs/Dashboard.md

@@ -1118,6 +1118,12 @@ Powerups, Orb, TV Screen and Head Icon effects (drawn as LEGO or unlit), Flair's
 client's environment textures come from `/api/scenery/env/:name` (`reflection`, `polished`, `brushed`,
 `brushedNoise`). Placed player models are drawn by the viewer's own lighting.
 
+The views ask for a zone's manifest with the conversion format they're written for (`?format=5`,
+`scenery-core.js` `SCENERY_FORMAT`, which follows `Scenery.cpp` `FORMAT_VERSION`), since browsers keep manifests for up
+to a day. A manifest without `techniques` (an older server's) is drawn with the viewer's own lights and its
+`textureAlpha` table instead of guessing every shader as LEGO, which laid see-through textures over white vertex
+colors (white trees, rocks and water).
+
 Converting a model the caches don't have yet (a big "glom" file takes a moment) happens on a few worker threads, so
 the dashboard keeps answering everything else meanwhile: the route hands the request to a worker (`Web::Defer`) and
 the web thread sends the answer when it is ready. Flairs and small models (up to 256 KB) go first, and one of the