chore: fix eslint errors introduced across phases 1-3

apps/next/tests/component/xterm-session.test.tsx

@@ -13,11 +13,11 @@ const {
   writeTextSpy,
 } = vi.hoisted(() => ({
   openSpy: vi.fn(),
-  wsInstances: [] as Array<{
+  wsInstances: [] as {
     url: string;
     send: ReturnType<typeof vi.fn>;
     close: ReturnType<typeof vi.fn>;
-  }>,
+  }[],
   fetchSpy: vi.fn(),
   fitSpy: vi.fn(),
   selectionHandlers: [] as (() => void)[],
@@ -110,17 +110,23 @@ beforeEach(() => {
   fetchSpy.mockResolvedValue({
     ok: true,
     status: 200,
-    json: async () => ({ url: 'ws://x' }),
-    text: async () => '',
+    json: () => Promise.resolve({ url: 'ws://x' }),
+    text: () => Promise.resolve(''),
   });
   vi.stubGlobal('WebSocket', FakeWebSocket);
   vi.stubGlobal('fetch', fetchSpy);
   vi.stubGlobal(
     'ResizeObserver',
     class {
-      observe() {}
-      disconnect() {}
-      unobserve() {}
+      observe() {
+        /* noop */
+      }
+      disconnect() {
+        /* noop */
+      }
+      unobserve() {
+        /* noop */
+      }
     },
   );
   Object.defineProperty(document, 'fonts', {