Initial commit

src/lib/workspace-mode-storage.ts

@@ -0,0 +1,42 @@
+"use client"
+
+const WORKSPACE_MODES = ["conversation", "fusion", "files"] as const
+
+export type PersistedWorkspaceMode = (typeof WORKSPACE_MODES)[number]
+
+interface PersistedWorkspaceState {
+  mode: PersistedWorkspaceMode
+}
+
+function isWorkspaceMode(value: unknown): value is PersistedWorkspaceMode {
+  return WORKSPACE_MODES.includes(value as PersistedWorkspaceMode)
+}
+
+export function loadPersistedWorkspaceMode(
+  storageKey: string
+): PersistedWorkspaceMode | null {
+  if (typeof window === "undefined") return null
+
+  try {
+    const raw = localStorage.getItem(storageKey)
+    if (!raw) return null
+    const parsed = JSON.parse(raw) as Partial<PersistedWorkspaceState>
+    if (!isWorkspaceMode(parsed.mode)) return null
+    return parsed.mode
+  } catch {
+    return null
+  }
+}
+
+export function savePersistedWorkspaceMode(
+  storageKey: string,
+  mode: PersistedWorkspaceMode
+) {
+  if (typeof window === "undefined") return
+
+  try {
+    localStorage.setItem(storageKey, JSON.stringify({ mode }))
+  } catch {
+    /* ignore */
+  }
+}