first commit. working

hooks/useTeachers.ts

@@ -0,0 +1,18 @@
+import { useState, useEffect } from 'react';
+import { db, Teacher } from '../utils/db';
+import { v4 as uuid } from 'uuid';
+
+export function useTeachers() {
+  const [teachers, setTeachers] = useState<Teacher[]>([]);
+
+  useEffect(() => {
+    db.teachers.toArray().then(setTeachers);
+  }, []);
+
+  const addTeacher = (name: string) => {
+    const t: Teacher = { id: uuid(), name };
+    db.teachers.add(t).then(() => setTeachers(prev => [...prev, t]));
+  };
+
+  return { teachers, addTeacher };
+}