fix(test): add _resetForTesting to all session state tests

src/hooks/keyword-detector/index.test.ts

@@ -1,6 +1,6 @@
 import { describe, expect, test, beforeEach, afterEach, spyOn } from "bun:test"
 import { createKeywordDetectorHook } from "./index"
-import { setMainSession, updateSessionAgent, clearSessionAgent } from "../../features/claude-code-session-state"
+import { setMainSession, updateSessionAgent, clearSessionAgent, _resetForTesting } from "../../features/claude-code-session-state"
 import { ContextCollector } from "../../features/context-injector"
 import * as sharedModule from "../../shared"
 import * as sessionState from "../../features/claude-code-session-state"
@@ -11,6 +11,7 @@ describe("keyword-detector registers to ContextCollector", () => {
   let getMainSessionSpy: ReturnType<typeof spyOn>
 
   beforeEach(() => {
+    _resetForTesting()
     logCalls = []
     logSpy = spyOn(sharedModule, "log").mockImplementation((msg: string, data?: unknown) => {
       logCalls.push({ msg, data })