feat: Implement AI Gateway page with feature tiles and descriptions

feat: Update AppSidebar to include new Environments and Credentials sections

feat: Enhance node form with branch selection for triggers and deployment

feat: Create CredentialForm and CredentialRow components for managing credentials

feat: Add API endpoints for credential management

fix: Update node catalog defaults for deploy and promote nodes

web/lib/node-catalog.ts

@@ -55,7 +55,7 @@ export const CATALOG: CatalogEntry[] = [
     icon: Play,
     color: "bg-emerald-500",
     outputs: 1,
-    defaults: { mode: "manual" },
+    defaults: { mode: "manual", fromBranch: "main", toBranch: "production" },
     group: "trigger",
   },
   {
@@ -211,27 +211,35 @@ export const CATALOG: CatalogEntry[] = [
   {
     type: "flow-nodes-base.deploy",
     label: "Deploy",
-    description: "Ship the artifact to a runtime (K8s / Bedrock / Vertex).",
+    description: "Deploy the built image to AWS Bedrock AgentCore (K8s + Vertex coming soon).",
     icon: Rocket,
     color: "bg-rose-500",
     outputs: 1,
     defaults: {
-      runtime: "kubernetes",
-      env: "dev",
-      target: "",
+      target: "agentcore",
+      credentialName: "aws",
+      runtimeName: "",
+      image: "",
+      envVars: {},
+      timeoutSeconds: 600,
     },
     group: "deploy",
   },
   {
     type: "flow-nodes-base.promote",
     label: "Promote",
-    description: "Promote a deployed artifact to the next environment.",
+    description: "Promote source by opening or merging a PR from fromBranch → toBranch on the agent's repo.",
     icon: ArrowUpFromLine,
     color: "bg-orange-500",
     outputs: 1,
     defaults: {
-      fromEnv: "staging",
-      toEnv: "prod",
+      mode: "open-pr",
+      fromBranch: "",
+      toBranch: "",
+      title: "",
+      body: "Promotion opened by Flow.",
+      mergeMethod: "merge",
+      timeoutSeconds: 60,
     },
     group: "deploy",
   },