chore: import upstream snapshot with attribution

apps/sim/stores/panel/toolbar/index.ts

@@ -0,0 +1 @@
+export { useToolbarStore } from './store'

apps/sim/stores/panel/toolbar/store.ts

@@ -0,0 +1,32 @@
+import { create } from 'zustand'
+import { devtools, persist } from 'zustand/middleware'
+
+export type ToolbarSectionKey = 'triggers' | 'blocks' | 'customBlocks' | 'tools'
+
+interface ToolbarState {
+  expandedSections: Record<ToolbarSectionKey, boolean>
+  setSectionExpanded: (key: ToolbarSectionKey, expanded: boolean) => void
+}
+
+const initialState: Pick<ToolbarState, 'expandedSections'> = {
+  expandedSections: { triggers: true, blocks: true, customBlocks: true, tools: true },
+}
+
+export const useToolbarStore = create<ToolbarState>()(
+  devtools(
+    persist(
+      (set) => ({
+        ...initialState,
+        setSectionExpanded: (key, expanded) =>
+          set((state) => ({
+            expandedSections: { ...state.expandedSections, [key]: expanded },
+          })),
+      }),
+      {
+        name: 'toolbar-state',
+        partialize: (state) => ({ expandedSections: state.expandedSections }),
+      }
+    ),
+    { name: 'toolbar-store' }
+  )
+)