Refactor instance metadata handling

packages/ui/src/stores/instance-metadata.ts

@@ -0,0 +1,35 @@
+import { createSignal } from "solid-js"
+import type { InstanceMetadata } from "../types/instance"
+
+const [metadataMap, setMetadataMap] = createSignal<Map<string, InstanceMetadata | undefined>>(new Map())
+
+function getInstanceMetadata(instanceId: string): InstanceMetadata | undefined {
+  return metadataMap().get(instanceId)
+}
+
+function setInstanceMetadata(instanceId: string, metadata: InstanceMetadata | undefined): void {
+  setMetadataMap((prev) => {
+    const next = new Map(prev)
+    if (metadata === undefined) {
+      next.delete(instanceId)
+    } else {
+      next.set(instanceId, metadata)
+    }
+    return next
+  })
+}
+
+function mergeInstanceMetadata(instanceId: string, updates: InstanceMetadata): void {
+  setMetadataMap((prev) => {
+    const next = new Map(prev)
+    const existing = next.get(instanceId) ?? {}
+    next.set(instanceId, { ...existing, ...updates })
+    return next
+  })
+}
+
+function clearInstanceMetadata(instanceId: string): void {
+  setInstanceMetadata(instanceId, undefined)
+}
+
+export { metadataMap, getInstanceMetadata, setInstanceMetadata, mergeInstanceMetadata, clearInstanceMetadata }