feat(FN-3505): add node onboarding mapping flow with asset-gated bundling

- Add onboarding project-mapping API contracts and dashboard UI wiring in AddNodeModal/NodesView
- Persist node-to-project mappings with rollback-safe failure handling and expanded hook/API test coverage
- Document node onboarding mapping behavior in architecture and multi-project docs
- Add tsup bundle asset gates for openclaw bridge and droid runtime, with changesets and bundle output tests

Fusion-Task-Id: FN-3505

packages/dashboard/app/components/AddNodeModal.css

@@ -149,6 +149,34 @@
   gap: var(--space-sm);
 }
 
+.add-node-modal__projects {
+  display: flex;
+  flex-direction: column;
+  gap: var(--space-sm);
+}
+
+.add-node-modal__projects-title {
+  margin: 0;
+  font-size: calc(var(--space-md) + var(--space-xs) * 0.5);
+}
+
+.add-node-modal__project-list {
+  display: flex;
+  flex-direction: column;
+  gap: var(--space-sm);
+}
+
+.add-node-modal__project-card {
+  padding: var(--space-sm);
+  display: flex;
+  flex-direction: column;
+  gap: var(--space-sm);
+}
+
+.add-node-modal__project-toggle {
+  margin: 0;
+}
+
 @media (max-width: 768px) {
   .add-node-modal {
     width: calc(100vw - (var(--space-md) * 2));
@@ -171,4 +199,8 @@
   .add-node-modal__row {
     grid-template-columns: 1fr;
   }
+
+  .add-node-modal__project-card {
+    padding: var(--space-md);
+  }
 }