chore(lint): burn down remaining warnings to zero

src/gateway/server.test.ts

@@ -199,7 +199,7 @@ describe('GatewayServer integration', () => {
       const doneEvent = messages[0] as GatewayEvent;
       expect(doneEvent.id).toBe(4);
       expect(doneEvent.event).toBe('done');
-      expect((doneEvent.data as any).content).toBe('Hello from Flynn!');
+      expect((doneEvent.data as { content?: string }).content).toBe('Hello from Flynn!');
     } finally {
       ws.close();
     }
@@ -319,7 +319,7 @@ describe('GatewayServer lock mode', () => {
     try {
       const result = await sendAndReceive(ws, { id: 1, method: 'system.health' });
       const response = result as GatewayResponse;
-      expect((response.result as any).status).toBe('ok');
+      expect((response.result as { status?: string }).status).toBe('ok');
     } finally {
       ws.close();
       // Wait for the close to propagate so connectionMap is empty
@@ -363,7 +363,7 @@ describe('GatewayServer lock mode', () => {
     try {
       const result = await sendAndReceive(ws2, { id: 2, method: 'system.health' });
       const response = result as GatewayResponse;
-      expect((response.result as any).status).toBe('ok');
+      expect((response.result as { status?: string }).status).toBe('ok');
     } finally {
       ws2.close();
       await new Promise(r => setTimeout(r, 100));