test: raise vitest timeout to 15 s for loaded CI runners

A userEvent-heavy colony form spec took 5.1 s inside the Docker build
and hit the 5 s default.

Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>

ApiCore-Frontend/vitest.config.ts

@@ -8,6 +8,9 @@ export default defineConfig({
     environment: "jsdom",
     setupFiles: ["./vitest.setup.ts"],
     globals: true,
+    // userEvent-heavy form specs take 1–2 s locally and can pass 5 s on a
+    // loaded CI runner (Docker build); 15 s keeps real hangs visible.
+    testTimeout: 15_000,
   },
   resolve: {
     alias: {