fix(test): follow the home split in source contracts and expose element colors

Gate 2888 failed ten frontend contracts after the onboarding shell and bootstrap moved out of page.tsx, and the western element colors were missing from @theme. The scans now follow the new files and still require the home page to mount them.

frontend/src/app/globals.css

@@ -72,6 +72,10 @@
   --color-planet-saturn: var(--color-planet-saturn);
   --color-planet-node: var(--color-planet-node);
   --color-planet-ascendant: var(--color-planet-ascendant);
+  --color-element-fire: var(--color-element-fire);
+  --color-element-earth: var(--color-element-earth);
+  --color-element-air: var(--color-element-air);
+  --color-element-water: var(--color-element-water);
   --radius-sm: 8px;
   --radius-md: 8px;
   --radius-lg: 12px;

frontend/src/lib/home-bootstrap-run.ts

@@ -217,6 +217,7 @@ export async function runAccountPhase(
       theme: "career",
       modelId: previewModelCatalog.defaultModelId,
       messages: previewMessages,
+      // session-clock-exempt: development preview fixture, not a stored session
       updatedAt: timestamp(),
       sessionType: "consultation",
       rectificationCaseId: null,