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/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")