fix(navara): disable redundant sun shadows in minimal look

Minimal inherited the sun light default of castShadow=true although the photoreal tiles carry baked lighting. Use the same no-shadow sun configuration as cinematic. The focused 3-run city gate improved from C4.6/N5.1 ms (1.1087) to C4.6/N4.9 ms (1.0652) with 12000 vessels. Full Node 24 tests and allocation gates, boundaries, format, build and panel build pass.

src/globe/navara/viewOptions.js

@@ -204,7 +204,8 @@ const PLANS = {
   minimal: () => ({
     pluginDefault: false,
     meshes: [{ sky: {} }, { stars: {} }],
-    lights: [{ skyLightProbe: {} }, { sun: {} }],
+    // Match cinematic: Google tiles already carry baked sunlight.
+    lights: [{ skyLightProbe: {} }, { sun: { castShadow: false } }],
     effects: [],
     globeLighting: false,
     atmosphereLuminance: 1,

src/globe/navara/viewOptions.test.mjs

@@ -70,7 +70,7 @@ test('cinematic is the default look; photoreal is the default plugin scene; mini
   assert.deepEqual(navaraScenePlan('minimal'), {
     pluginDefault: false,
     meshes: [{ sky: {} }, { stars: {} }],
-    lights: [{ skyLightProbe: {} }, { sun: {} }],
+    lights: [{ skyLightProbe: {} }, { sun: { castShadow: false } }],
     effects: [],
     globeLighting: false,
     atmosphereLuminance: 1,