ui(deploy): PrimaryActionButton + computeMode state-machine helper

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

ui/src/pages/AppsTab/AppDeploymentPage/PrimaryActionButton.tsx

@@ -0,0 +1,34 @@
+import { Button } from '@cameleer/design-system';
+
+export type PrimaryActionMode = 'save' | 'redeploy' | 'deploying';
+
+interface Props {
+  mode: PrimaryActionMode;
+  enabled: boolean;
+  onClick: () => void;
+}
+
+export function PrimaryActionButton({ mode, enabled, onClick }: Props) {
+  if (mode === 'deploying') {
+    return <Button size="sm" variant="primary" loading disabled>Deploying…</Button>;
+  }
+  if (mode === 'redeploy') {
+    return <Button size="sm" variant="primary" disabled={!enabled} onClick={onClick}>Redeploy</Button>;
+  }
+  return <Button size="sm" variant="primary" disabled={!enabled} onClick={onClick}>Save</Button>;
+}
+
+export function computeMode({
+  deploymentInProgress,
+  hasLocalEdits,
+  serverDirtyAgainstDeploy,
+}: {
+  deploymentInProgress: boolean;
+  hasLocalEdits: boolean;
+  serverDirtyAgainstDeploy: boolean;
+}): PrimaryActionMode {
+  if (deploymentInProgress) return 'deploying';
+  if (hasLocalEdits) return 'save';
+  if (serverDirtyAgainstDeploy) return 'redeploy';
+  return 'save';
+}