♻️ Simplify local development workflow (#2414)

## AI Disclaimer

Using Codex with gpt-5.6-sol. Reviewed manually.

.pre-commit-config.yaml

@@ -64,7 +64,7 @@ repos:
         entry: bash ./scripts/generate-client.sh
         pass_filenames: false
         language: unsupported
-        files: ^backend/.*$|^scripts/generate-client\.sh$
+        files: ^backend/app/.*\.py$|^backend/pyproject\.toml$|^uv\.lock$|^frontend/openapi-ts\.config\.ts$|^scripts/generate-client\.sh$
 
       - id: add-release-date
         language: unsupported