ALTER TABLE community.vocab_course_lesson
ADD COLUMN IF NOT EXISTS learning_goals JSONB,
ADD COLUMN IF NOT EXISTS core_patterns JSONB,
ADD COLUMN IF NOT EXISTS grammar_focus JSONB,
ADD COLUMN IF NOT EXISTS speaking_prompts JSONB,
ADD COLUMN IF NOT EXISTS practical_tasks JSONB;

INSERT INTO community.vocab_grammar_exercise_type (name, description, created_at) VALUES
  ('dialog_completion', 'Dialogergänzung', NOW()),
  ('situational_response', 'Situative Antwort', NOW()),
  ('pattern_drill', 'Muster-Drill', NOW()),
  ('reading_aloud', 'Lautlese-Übung', NOW()),
  ('speaking_from_memory', 'Freies Sprechen', NOW())
ON CONFLICT (name) DO NOTHING;