Fix CLI/protocol mismatches for select, frame main, and headers (#45)

* fix: align CLI command payloads with protocol

* fix(cli): support multi-value select in CLI

src/protocol.test.ts

@@ -15,6 +15,22 @@ describe('parseCommand', () => {
       }
     });
 
+    it('should parse navigate with headers', () => {
+      const result = parseCommand(
+        cmd({
+          id: '1',
+          action: 'navigate',
+          url: 'https://example.com',
+          headers: { Authorization: 'Bearer token' },
+        })
+      );
+      expect(result.success).toBe(true);
+      if (result.success) {
+        expect(result.command.action).toBe('navigate');
+        expect(result.command.headers).toEqual({ Authorization: 'Bearer token' });
+      }
+    });
+
     it('should reject navigate without url', () => {
       const result = parseCommand(cmd({ id: '1', action: 'navigate' }));
       expect(result.success).toBe(false);

src/protocol.ts

@@ -36,6 +36,7 @@ const navigateSchema = baseCommandSchema.extend({
   action: z.literal('navigate'),
   url: z.string().min(1),
   waitUntil: z.enum(['load', 'domcontentloaded', 'networkidle']).optional(),
+  headers: z.record(z.string()).optional(),
 });
 
 const clickSchema = baseCommandSchema.extend({