Fix frontend runtime errors after Calcit upgrade

[tiye]

Summary

• align Calcit runtime and compatible Respo dependencies, pinning the upgraded alerts source commit
• normalize component state before map access and recover from invalid preview API responses
• migrate unsafe config field reads and make browser event callbacks return unit
• add client entry checking and a downloadable frontend artifact to CI

Local checks

• caps --ci
• yarn install --immutable
• calcit calcit.cirru edit format
• server check-only
• client check-only with Calcit 0.13.36 before the local tool updated
• production Vite build exercised with the newer local compiler; final browser smoke test will use the CI artifact built with the declared Calcit 0.13.36

This PR is intentionally not merged; Actions and the CI-built browser artifact will be verified first.

[Copilot]

Pull request overview

This PR updates the project to run cleanly after a Calcit upgrade by pinning compatible runtime/dependencies, hardening frontend runtime behavior against invalid state/API responses, and extending CI to validate/build and publish a frontend artifact for smoke testing.

Changes:

• Pin @calcit/procs to 0.13.36 and bump Calcit/Respo-related deps to compatible versions (including a pinned Respo/alerts.calcit commit).
• Make frontend runtime more defensive: normalize nested component state before map access; recover from invalid preview API responses; ensure some browser event callbacks return nil.
• Enhance CI with a top-level Calcit --check-only step and upload dist/ as a short-lived artifact.

Reviewed changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
yarn.lock	Locks @calcit/procs to 0.13.36 for reproducible installs.
package.json	Pins @calcit/procs to 0.13.36 to match the upgraded runtime.
deps.cirru	Updates Calcit/Respo dependency versions and pins Respo/alerts.calcit to a specific commit.
calcit.cirru	Adds defensive runtime checks for preview parsing/state shape and adjusts event handlers/config reads.
.github/workflows/upload.yaml	Adds Calcit check-only and uploads the built frontend (dist) as an artifact.

---

💡 Add a code-review agent skill or configure MCP servers for context-aware, tailored reviews. Learn more in the docs.

[tiye]

Calcit 0.13.37 follow-up pushed in 77eb8b9. This now depends on Respo/respo.calcit#114 through prerelease branch 0.16.84-calcit-0.13.37.0 so caps selects the fixed dependency before formal release. Local verification passed: caps --ci, client/server check-only, yarn install --immutable, yarn compile-page, Node 24 Vite production build, and fresh production browser load with zero console errors. Not merging; waiting for both PR Actions.

[tiye]

Follow-up: copyboard now depends on normal Respo 0.16.84, tracked by Respo/respo.calcit#115. Revalidated locally with caps --ci and yarn compile-page.