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/claude-code-hooks/execute-http-hook-security.test.ts

@@ -31,7 +31,7 @@ describe("executeHttpHook TLS security", () => {
   let logCalls: Array<{ message: string; data?: unknown }>
 
   beforeEach(() => {
-    globalThis.fetch = mockFetch as unknown as typeof fetch
+    globalThis.fetch = testCoerce<typeof fetch>(mockFetch)
     mockFetch.mockReset()
     mockFetch.mockImplementation(() =>
       Promise.resolve(new Response(JSON.stringify({}), { status: 200 }))