fix(ci): simplify test runner to plain bun test by fixing mock.module() leakage

- Add afterAll(() => { mock.restore() }) to 52 test files missing cleanup
- Rewrite create-tool-guard-hooks.test.ts to use spyOn instead of barrel mock
- Fix skill-mcp-manager OAuth tests with missing mockTokens/mockLogin definitions
- Fix start-work hook: show worktree active block on resume with existing worktree_path
- Extract createWorktreeActiveBlock to worktree-block.ts to avoid circular import
- Replace 80-line isolated test runner CI config with single `bun test` command

src/hooks/anthropic-context-window-limit-recovery/empty-content-recovery-sdk.test.ts

@@ -1,4 +1,4 @@
-import { describe, it, expect, mock, beforeEach } from "bun:test"
+import { afterAll, describe, it, expect, mock, beforeEach } from "bun:test"
 import { fixEmptyMessagesWithSDK } from "./empty-content-recovery-sdk"
 
 const mockReplaceEmptyTextParts = mock(() => Promise.resolve(false))
@@ -11,6 +11,10 @@ mock.module("../session-recovery/storage/text-part-injector", () => ({
   injectTextPartAsync: mockInjectTextPart,
 }))
 
+afterAll(() => {
+  mock.restore()
+})
+
 function createMockClient(messages: Array<{ info?: { id?: string }; parts?: Array<{ type?: string; text?: string }> }>) {
   return {
     session: {

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

@@ -11,6 +11,7 @@ mock.module("./deduplication-recovery", () => ({
 
 afterAll(() => {
   mock.module("./deduplication-recovery", () => originalDeduplicationRecovery)
+  mock.restore()
 })
 
 function createImmediateTimeouts(): () => void {

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

@@ -13,6 +13,7 @@ mock.module("./storage", () => {
 
 afterAll(() => {
   mock.module("./storage", () => storage)
+  mock.restore()
 })
 
 describe("truncateUntilTargetTokens", () => {