fix(ci): resolve mock.module() cross-file leakage in test suite

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

src/hooks/anthropic-context-window-limit-recovery/message-builder.test.ts

@@ -33,7 +33,9 @@ mock.module("../session-recovery/storage/text-part-injector", () => ({
 }))
 
 async function importFreshMessageBuilder(): Promise<typeof import("./message-builder")> {
-  return import(`./message-builder?test=${Date.now()}-${Math.random()}`)
+  const module = await import(`./message-builder?test=${Date.now()}-${Math.random()}`)
+  mock.restore()
+  return module
 }
 
 afterAll(() => {