inspect (#736)

* inspect

* fixes

* improvements

* fixes

* fixes

* improvements

* fix null cdp url

* fix rust reader loop

* improvements

* improvements

* fixes

src/inspect-server.test.ts

@@ -0,0 +1,35 @@
+import { describe, it, expect } from 'vitest';
+import { injectSessionId, stripSessionId } from './inspect-server.js';
+
+describe('injectSessionId', () => {
+  it('should inject sessionId into a command', () => {
+    const input = '{"id":1,"method":"DOM.getDocument"}';
+    const result = JSON.parse(injectSessionId(input, 'abc123'));
+    expect(result.sessionId).toBe('abc123');
+    expect(result.method).toBe('DOM.getDocument');
+    expect(result.id).toBe(1);
+  });
+
+  it('should inject sessionId into an empty object', () => {
+    const result = JSON.parse(injectSessionId('{}', 'abc'));
+    expect(result.sessionId).toBe('abc');
+  });
+});
+
+describe('stripSessionId', () => {
+  it('should remove sessionId from a message', () => {
+    const input = '{"id":1,"result":{},"sessionId":"abc123"}';
+    const result = JSON.parse(stripSessionId(input));
+    expect(result.sessionId).toBeUndefined();
+    expect(result.id).toBe(1);
+  });
+});
+
+describe('inject then strip roundtrip', () => {
+  it('should return the original message after inject + strip', () => {
+    const input = '{"id":42,"method":"Runtime.evaluate"}';
+    const injected = injectSessionId(input, 'sess1');
+    const stripped = stripSessionId(injected);
+    expect(JSON.parse(stripped)).toEqual(JSON.parse(input));
+  });
+});