docs(ai): fix duplicated install commands in README/CONTRIBUTING (agent)

Co-authored-by: PR0M3TH3AN <[email protected]>

docs/agents/task-logs/daily/2026-02-16_13-05-00_docs-agent_completed.md

@@ -0,0 +1,13 @@
+# docs-agent Task Log
+
+- **Date**: 2026-02-16
+- **Agent**: docs-agent
+- **Status**: Completed
+- **Cadence**: Daily
+
+## Activities
+- Audited `README.md` and `CONTRIBUTING.md` for duplicate instructions.
+- Removed redundant `npx playwright install` commands.
+- Consolidated installation instructions.
+- Removed redundant `npm run test:smoke` entries and clarified existing ones.
+- Verified changes with `npm run lint` and `npm run format`.