test: run suite through isolated mock runner

src/index.test.ts

@@ -52,12 +52,18 @@ function installIndexModuleMocks(): void {
     getSkillPluginConflictWarning: mockGetSkillPluginConflictWarning,
   }))
 
-  mock.module("./shared", () => ({
-    injectServerAuthIntoClient: mockInjectServerAuthIntoClient,
+  mock.module("./shared/logger", () => ({
     log: mock(() => {}),
+  }))
+
+  mock.module("./shared/log-legacy-plugin-startup-warning", () => ({
     logLegacyPluginStartupWarning: mockLogLegacyPluginStartupWarning,
   }))
 
+  mock.module("./shared/opencode-server-auth", () => ({
+    injectServerAuthIntoClient: mockInjectServerAuthIntoClient,
+  }))
+
   mock.module("./plugin-config", () => ({
     loadPluginConfig: mockLoadPluginConfig,
   }))