feat(notes): add notes hook

src/hooks/useNotes.ts

@@ -0,0 +1,33 @@
+import { useCallback, useEffect, useMemo, useState } from 'react'
+import type { Note } from '../types'
+import { loadNotes, saveNotes } from '../lib/notesStorage'
+
+export function useNotes() {
+  const [notes, setNotes] = useState<Note[]>(() => loadNotes())
+
+  useEffect(() => {
+    saveNotes(notes)
+  }, [notes])
+
+  const addNote = useCallback(() => {
+    const note: Note = { id: Date.now(), title: '', content: '' }
+    setNotes((current) => [...current, note])
+    return note
+  }, [])
+
+  const updateNote = useCallback((id: number, patch: Partial<Pick<Note, 'title' | 'content'>>) => {
+    setNotes((current) => current.map((note) => (note.id === id ? { ...note, ...patch } : note)))
+  }, [])
+
+  const deleteNote = useCallback((id: number) => {
+    setNotes((current) => current.filter((note) => note.id !== id))
+  }, [])
+
+  const sortedNotes = useMemo(
+    () =>
+      [...notes].sort((a, b) => a.title.localeCompare(b.title, undefined, { sensitivity: 'base' })),
+    [notes],
+  )
+
+  return { notes: sortedNotes, addNote, updateNote, deleteNote }
+}