Hide Navara infrastructure stems and data pack meshes behind walls, terrain and the Earth

Navara draws its transparent scene after the post effects into a target without the scene depth, so stems and pack polygons and images painted through 3D tiles. A scene-depth test now drops each of their fragments behind the depth Navara packs after its opaque pass; they stay in the transparent pass, so their look in the open is unchanged (scripts/qa-edge-occlusion.mjs compares it with the previous build). Wind flow was already hidden and is kept as a guard in the same scenario.

scripts/check-import-directions.mjs

@@ -71,7 +71,11 @@ const renderedLayer = (file) =>
   RENDERED_LAYER_DIRS.some((dir) => file.startsWith(dir));
 const cesiumLayerRenderer = (file) =>
   /\/render\/cesium(?:[^/]*|\/[^/]+)\.js$/.test(file);
-const navaraLayerRenderer = (file) => /\/render\/navara[^/]*\.js$/.test(file);
+// Navara renderers outside a layer's render/ directory: like those, they
+// reach the app only through the Navara mode's import().
+const NAVARA_SCENE_RENDERERS = new Set(['src/scenes/dataPacks/navara.js']);
+const navaraLayerRenderer = (file) =>
+  /\/render\/navara[^/]*\.js$/.test(file) || NAVARA_SCENE_RENDERERS.has(file);
 const renderer = (file) =>
   /^src\/(?:ui|app|standalone|overlays)\//.test(file) ||
   /^src\/layers\/[^/]+\/(?:index|rendering|snapshotRenderer|overlay|presentation|cards|controls)\.js$/.test(

scripts/package-boundaries.json

@@ -3706,6 +3706,7 @@
       "src/layers/awareness/render/navara.js",
       "src/layers/infrastructure/render/navara.js",
       "src/layers/shared/render/navaraStems.js",
+      "src/layers/shared/render/navaraSceneDepth.js",
       "src/layers/submarineCables/render/navara.js",
       "src/layers/directions/render/navara.js",
       "src/layers/traffic/render/navara.js",