test(hooks): remove unsafe test assertions

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/recovery-deduplication.test.ts

@@ -20,7 +20,7 @@ function createImmediateTimeouts(): () => void {
 
   globalThis.setTimeout = ((callback: (...args: unknown[]) => void, _delay?: number, ...args: unknown[]) => {
     callback(...args)
-    return 0 as unknown as ReturnType<typeof setTimeout>
+    return testCoerce<ReturnType<typeof setTimeout>>(0)
   }) as typeof setTimeout
 
   globalThis.clearTimeout = ((_: ReturnType<typeof setTimeout>) => {}) as typeof clearTimeout