code quality in place

.pre-commit-config.yaml

@@ -18,6 +18,13 @@ repos:
 
   - repo: local
     hooks:
+      - id: mypy
+        name: mypy
+        entry: bash -c 'cd backend && uv run mypy .'
+        language: system
+        files: ^backend/.*\.py$
+        pass_filenames: false
+
       - id: eslint
         name: ESLint
         entry: npm run lint --prefix frontend