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/storage.test.ts

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