fix(tests): update atlas hook and auto-update-checker tests

- atlas hook: update verification reminder assertions to match new
  4-phase QA system (MANDATORY -> PHASE 1/2, LIE -> LYING)
- auto-update-checker: add missing revertPinnedVersion mock export
  to fix SyntaxError in background-update-check tests

Note: 4 auto-update-checker tests fail only when run alongside
checker.test.ts due to bun mock.module isolation issue (pre-existing
in v3.7.3, not a regression)

src/hooks/auto-update-checker/hook/background-update-check.test.ts

@@ -16,6 +16,7 @@ mock.module("../checker", () => ({
   getCachedVersion: mockGetCachedVersion,
   getLatestVersion: mockGetLatestVersion,
   updatePinnedVersion: mockUpdatePinnedVersion,
+  revertPinnedVersion: mock(() => false),
 }))
 
 mock.module("../version-channel", () => ({