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/cli/doctor/checks/system.test.ts

@@ -1,6 +1,6 @@
 /// <reference types="bun-types" />
 
-import { beforeEach, describe, expect, it, mock } from "bun:test"
+import { afterAll, beforeEach, describe, expect, it, mock } from "bun:test"
 import { PLUGIN_NAME } from "../../../shared"
 import type { PluginInfo } from "./system-plugin"
 
@@ -47,6 +47,10 @@ mock.module("./system-loaded-version", () => ({
   getSuggestedInstallTag: mockGetSuggestedInstallTag,
 }))
 
+afterAll(() => {
+  mock.restore()
+})
+
 describe("system check", () => {
   beforeEach(() => {
     mockFindOpenCodeBinary.mockReset()

src/cli/mcp-oauth/login.test.ts

@@ -1,4 +1,4 @@
-import { describe, it, expect, beforeEach, afterEach, mock } from "bun:test"
+import { afterAll, describe, it, expect, beforeEach, afterEach, mock } from "bun:test"
 
 const mockLogin = mock(() => Promise.resolve({ accessToken: "test-token", expiresAt: 1710000000 }))
 
@@ -11,6 +11,10 @@ mock.module("../../features/mcp-oauth/provider", () => ({
   },
 }))
 
+afterAll(() => {
+  mock.restore()
+})
+
 const { login } = await import("./login")
 
 describe("login command", () => {

src/cli/run/integration.test.ts

@@ -33,6 +33,7 @@ mock.module("../../shared/port-utils", () => ({
 afterAll(() => {
   mock.module("@opencode-ai/sdk", () => originalSdk)
   mock.module("../../shared/port-utils", () => originalPortUtils)
+  mock.restore()
 })
 
 const { createServerConnection } = await import("./server-connection")

src/cli/run/server-connection.test.ts

@@ -38,6 +38,7 @@ afterAll(() => {
   mock.module("@opencode-ai/sdk", () => originalSdk)
   mock.module("../../shared/port-utils", () => originalPortUtils)
   mock.module("./opencode-binary-resolver", () => originalBinaryResolver)
+  mock.restore()
 })
 
 const { createServerConnection } = await import("./server-connection")