chore: land Heddle remote 5.2.0 on fork main

[roackb2]

Summary

• upgrade @roackb2/heddle-remote from 5.0.0 to 5.2.0 on the SlideX fork main
• update only package.json and package-lock.json

Root cause

PR #27 contained the correct dependency change, but its base was the stacked codex/review-agent-e2e-fixture branch. Merging it advanced that feature branch rather than fork main, so GitHub showed the PR as merged while main still resolved Heddle remote 5.0.0.

This branch starts from the current fork main (8a02b109) and reapplies only the reviewed dependency commit. It is an internal fork correction; it does not open or imply a Noct-upstream PR.

Impact

The editor now consumes Heddle remote 5.2.0, matching the already-merged agent-server Heddle 5.2.0 bump. There are no editor source changes.

Validation

• npm ci
• npm test — 150/150
• npx tsc --noEmit
• npm run lint
• npm run test:agent — 12/12
• npm run build
• exact diff check: only package.json and package-lock.json