Fix test suite to properly clean up MCP servers

- Add Accept header to mock requests per MCP spec requirement
- Fix TypeScript build errors in integration tests
- Add shutdownSession calls to properly clean up MCP server intervals
- Update afterEach to ensure proper test cleanup
- Add debug configurations for Jest in VS Code launch.json

All tests now pass without hanging processes.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

.vscode/launch.json

@@ -13,6 +13,67 @@
       "env": {
         "NODE_ENV": "development"
       }
+    },
+    {
+      "name": "Debug Jest Tests",
+      "type": "node",
+      "request": "launch",
+      "runtimeArgs": [
+        "--experimental-vm-modules",
+        "--inspect-brk",
+        "${workspaceFolder}/node_modules/.bin/jest",
+        "--runInBand"
+      ],
+      "console": "integratedTerminal",
+      "internalConsoleOptions": "neverOpen",
+      "skipFiles": ["<node_internals>/**"],
+      "env": {
+        "NODE_OPTIONS": "--experimental-vm-modules"
+      }
+    },
+    {
+      "name": "Debug Current Jest Test File",
+      "type": "node",
+      "request": "launch",
+      "runtimeArgs": [
+        "--experimental-vm-modules",
+        "--inspect-brk",
+        "${workspaceFolder}/node_modules/.bin/jest",
+        "--runInBand",
+        "${relativeFile}"
+      ],
+      "console": "integratedTerminal",
+      "internalConsoleOptions": "neverOpen",
+      "skipFiles": ["<node_internals>/**"],
+      "env": {
+        "NODE_OPTIONS": "--experimental-vm-modules"
+      }
+    },
+    {
+      "name": "Debug Jest Test by Pattern",
+      "type": "node",
+      "request": "launch",
+      "runtimeArgs": [
+        "--experimental-vm-modules",
+        "--inspect-brk",
+        "${workspaceFolder}/node_modules/.bin/jest",
+        "--runInBand",
+        "--testNamePattern",
+        "${input:testNamePattern}"
+      ],
+      "console": "integratedTerminal",
+      "internalConsoleOptions": "neverOpen",
+      "skipFiles": ["<node_internals>/**"],
+      "env": {
+        "NODE_OPTIONS": "--experimental-vm-modules"
+      }
+    }
+  ],
+  "inputs": [
+    {
+      "id": "testNamePattern",
+      "type": "promptString",
+      "description": "Test name pattern to match (e.g., 'should trigger onsessionclosed')"
     }
   ]
 }