refactor(app): rename agents route to sessions with improved list layout

packages/app/src/app/_layout.tsx

@@ -645,7 +645,7 @@ export default function RootLayout() {
                                 options={{ gestureEnabled: false, freezeOnBlur: true }}
                               />
                               <Stack.Screen name="h/[serverId]/index" />
-                              <Stack.Screen name="h/[serverId]/agents" />
+                              <Stack.Screen name="h/[serverId]/sessions" />
                               <Stack.Screen name="h/[serverId]/open-project" />
                               <Stack.Screen name="h/[serverId]/settings" />
                               <Stack.Screen name="pair-scan" />

packages/app/src/app/h/[serverId]/sessions.tsx

@@ -1,9 +1,9 @@
 import { useLocalSearchParams } from "expo-router";
-import { AgentsScreen } from "@/screens/agents-screen";
+import { SessionsScreen } from "@/screens/sessions-screen";
 
 export default function HostAgentsRoute() {
   const params = useLocalSearchParams<{ serverId?: string }>();
   const serverId = typeof params.serverId === "string" ? params.serverId : "";
 
-  return <AgentsScreen serverId={serverId} />;
+  return <SessionsScreen serverId={serverId} />;
 }