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>

tests/dWebTests/NifFileTests.cpp

@@ -213,6 +213,36 @@ TEST(NifFileTests, PassesPropertiesDownTheTree) {
 	EXPECT_TRUE(m.doubleSided);
 }
 
+// A material whose NiAlphaController animates its alpha (flickering effects that rest at 0 in the file) is drawn at
+// its highest key; one without keeps its own alpha
+TEST(NifFileTests, DrawsAnAnimatedAlphaAtItsHighest) {
+	for (const bool animated : { true, false }) {
+		NifBuilder nif;
+		const auto root = nif.Add("NiNode", {});
+		const auto material = nif.Add("NiMaterialProperty", {});
+		const auto controller = nif.Add("NiAlphaController", {});
+		const auto interpolator = nif.Add("NiFloatInterpolator", {});
+		const auto keys = nif.Add("NiFloatData", Bytes().Put<uint32_t>(3).Put<uint32_t>(1).Floats({ 0.0f, 0.0f, 0.5f, 0.8f, 1.0f, 0.0f }));
+		// NiObjectNET with the controller, ambient, diffuse, specular, emissive, glossiness, alpha 0
+		Bytes body;
+		body.Put<uint32_t>(0xFFFFFFFF).Put<uint32_t>(0).Put<int32_t>(animated ? controller : -1);
+		body.Floats({ 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 10.0f, 0.0f });
+		nif.Set(material, body);
+		// NiTimeController: next, flags, frequency, phase, start, stop, target; the interpolator
+		nif.Set(controller, Bytes().Put<int32_t>(-1).Put<uint16_t>(8).Floats({ 1, 0, 0, 1 }).Put<int32_t>(material).Put<int32_t>(interpolator));
+		nif.Set(interpolator, Bytes().Put(0.0f).Put<int32_t>(keys));
+		const auto shape = nif.Add("NiTriShape", {});
+		const auto data = nif.Add("NiTriShapeData", TriShapeData());
+		nif.Set(root, Node(Av(0, { 0, 0, 0 }, IDENTITY, 1.0f, { material }), { shape }));
+		nif.Set(shape, Geometry(Av(0, { 0, 0, 0 }, IDENTITY, 1.0f, {}), data));
+		std::string error;
+		const auto model = NifFile::Parse(nif.Build({ root }), 0, error);
+		ASSERT_TRUE(model) << error;
+		ASSERT_EQ(model->meshes.size(), 1u);
+		EXPECT_FLOAT_EQ(model->meshes[0].material.alpha, animated ? 0.8f : 0.0f);
+	}
+}
+
 // Two layer shaders use NiTexturingProperty's dark texture too, each texture on the UV set its flags name
 TEST(NifFileTests, ReadsTheDarkTextureAndEachTexturesUvSet) {
 	NifBuilder nif;