fix: network policy create toggles and detail page for egress rules (#129)

<img width="365" height="298" alt="image"
src="https://github.com/user-attachments/assets/42ba7ee3-2e35-4419-874f-f3f34b1e3e4d"
/>

Author: dines-rl

src/components/NetworkPolicyCreatePage.tsx

@@ -158,6 +158,20 @@ export const NetworkPolicyCreatePage = ({
     currentField === "allow_devbox_to_devbox",
   );
 
+  const handleAgentGatewayNav = useFormSelectNavigation(
+    formData.allow_agent_gateway,
+    BOOLEAN_OPTIONS,
+    (value) => setFormData({ ...formData, allow_agent_gateway: value }),
+    currentField === "allow_agent_gateway",
+  );
+
+  const handleMcpGatewayNav = useFormSelectNavigation(
+    formData.allow_mcp_gateway,
+    BOOLEAN_OPTIONS,
+    (value) => setFormData({ ...formData, allow_mcp_gateway: value }),
+    currentField === "allow_mcp_gateway",
+  );
+
   // Main form input handler - active when not in hostnames expanded mode
   useInput(
     (input, key) => {
@@ -217,6 +231,8 @@ export const NetworkPolicyCreatePage = ({
       // Handle select field navigation
       if (handleAllowAllNav(input, key)) return;
       if (handleDevboxNav(input, key)) return;
+      if (handleAgentGatewayNav(input, key)) return;
+      if (handleMcpGatewayNav(input, key)) return;
 
       // Navigation between fields (up/down arrows and tab/shift+tab)
       if ((key.upArrow || (key.tab && key.shift)) && currentFieldIndex > 0) {

src/screens/NetworkPolicyDetailScreen.tsx

@@ -194,6 +194,14 @@ export function NetworkPolicyDetailScreen({
     label: "Allow Devbox-to-Devbox",
     value: policy.egress.allow_devbox_to_devbox ? "Yes" : "No",
   });
+  egressFields.push({
+    label: "Allow Agent Gateway",
+    value: policy.egress.allow_agent_gateway ? "Yes" : "No",
+  });
+  egressFields.push({
+    label: "Allow MCP Gateway",
+    value: policy.egress.allow_mcp_gateway ? "Yes" : "No",
+  });
 
   if (
     policy.egress.allowed_hostnames &&