fix: use branch-aware URL for Project Graphs link in DAG overlay

[nishantmonu51]

• The "Project Graphs" link in the resource graph quick-view overlay (ResourceGraphOverlay.svelte) used a hardcoded absolute /graph path.
• In Rill Cloud editing, the graph route is prefixed with /{org}/{project}/@{branch}/-/edit, so the absolute path 404s and ignores the branch context.
• Routed the href through withEditorPrefix() — the same helper the graph's own summary-node navigation already uses (SummaryNode.svelte). It resolves correctly in web-admin and is a no-op ("") in web-local.

Checklist:

• Covered by tests
• Ran it and it works as intended
• Reviewed the diff before requesting a review
• Checked for unhandled edge cases
• Linked the issues it closes
• Checked if the docs need to be updated. If so, create a separate Linear DOCS issue
• Intend to cherry-pick into the release branch
• I'm proud of this work!

---

Developed in collaboration with Claude Code

[Copilot]

Pull request overview

Fixes the “Project Graphs” link in the Resource Graph quick-view overlay so it respects the Cloud editor route prefix (org/project/branch edit context) instead of using a hardcoded absolute /graph path.

Changes:

• Adds editor-route prefixing to the overlay’s graph link so it resolves correctly in Cloud edit routes.
• Reuses the shared editor-routing mechanism used elsewhere for graph navigation.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.