Initial commit: personal task planner with categories, projects, and tiered assignment

Personal-first lists/tasks/reminders/recurrence, plus an admin-editable status
pipeline, shared categories, project containers, and a three-tier permission
model for cross-user work: assign (hand off your own tasks), reallocate
(dispatcher — move anyone's tasks), admin (reserved, full manage-all).

frontend/src/context/ListsContext.tsx

@@ -0,0 +1,32 @@
+import { createContext, useContext, useEffect, useState, useCallback } from 'react'
+import type { List } from '../types'
+import { fetchLists } from '../api'
+
+interface ListsCtx {
+  lists: List[]
+  loading: boolean
+  reload: () => Promise<void>
+}
+
+const Ctx = createContext<ListsCtx | null>(null)
+
+export function useLists() {
+  const ctx = useContext(Ctx)
+  if (!ctx) throw new Error('useLists must be used inside ListsProvider')
+  return ctx
+}
+
+export function ListsProvider({ children }: { children: React.ReactNode }) {
+  const [lists, setLists] = useState<List[]>([])
+  const [loading, setLoading] = useState(true)
+
+  const reload = useCallback(async () => {
+    const data = await fetchLists().catch(() => [])
+    setLists(data)
+    setLoading(false)
+  }, [])
+
+  useEffect(() => { reload() }, [reload])
+
+  return <Ctx.Provider value={{ lists, loading, reload }}>{children}</Ctx.Provider>
+}