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/session-recovery/recover-tool-result-missing.test.ts

@@ -1,4 +1,4 @@
-const { describe, it, expect, mock, beforeEach } = require("bun:test")
+const { describe, it, expect, mock, beforeEach, afterAll } = require("bun:test")
 
 import type { MessageData } from "./types"
 
@@ -17,6 +17,10 @@ mock.module("./storage", () => ({
   readParts: () => storedParts,
 }))
 
+afterAll(() => {
+  mock.restore()
+})
+
 const { recoverToolResultMissing } = await import("./recover-tool-result-missing")
 
 function createMockClient(messages: MessageData[] = []) {