test: avoid duplicating plugin contract lane

test/vitest-scoped-config.test.ts

@@ -656,6 +656,7 @@ describe("scoped vitest configs", () => {
   it("normalizes plugins include patterns relative to the scoped dir", () => {
     expect(defaultPluginsConfig.test?.dir).toBe("src/plugins");
     expect(defaultPluginsConfig.test?.include).toEqual(["**/*.test.ts"]);
+    expect(defaultPluginsConfig.test?.exclude).toContain("contracts/**");
   });
 
   it("normalizes ui include patterns relative to the scoped dir", () => {

vitest.plugins.config.ts

@@ -4,6 +4,7 @@ export function createPluginsVitestConfig(env?: Record<string, string | undefine
   return createScopedVitestConfig(["src/plugins/**/*.test.ts"], {
     dir: "src/plugins",
     env,
+    exclude: ["src/plugins/contracts/**"],
     isolate: true,
     name: "plugins",
     passWithNoTests: true,