Initial commit

src/lib/panel-state-storage.ts

@@ -0,0 +1,38 @@
+"use client"
+
+export interface PersistedPanelState {
+  isOpen: boolean
+  width: number
+}
+
+export function loadPersistedPanelState(
+  storageKey: string
+): PersistedPanelState | null {
+  if (typeof window === "undefined") return null
+
+  try {
+    const raw = localStorage.getItem(storageKey)
+    if (!raw) return null
+    const parsed = JSON.parse(raw) as Partial<PersistedPanelState>
+    if (typeof parsed.isOpen !== "boolean") return null
+    if (typeof parsed.width !== "number" || Number.isNaN(parsed.width)) {
+      return null
+    }
+    return { isOpen: parsed.isOpen, width: parsed.width }
+  } catch {
+    return null
+  }
+}
+
+export function savePersistedPanelState(
+  storageKey: string,
+  state: PersistedPanelState
+) {
+  if (typeof window === "undefined") return
+
+  try {
+    localStorage.setItem(storageKey, JSON.stringify(state))
+  } catch {
+    /* ignore */
+  }
+}