feat: universal environment dashboard

[kmendell]

Checklist

• This PR is not opened from my fork’s main branch

What This PR Implements

Fixes: #2142

Changes Made

Testing Done

• Development environment started: ./scripts/development/dev.sh start
• Frontend verified at http://localhost:3000
• Backend verified at http://localhost:3552
• Manual testing completed (describe):
• No linting errors (e.g., just lint all)
• Backend tests pass: just test backend

AI Tool Used (if applicable)

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What AI helped with:
I reviewed and edited all AI-generated output:
I ran all required tests and manually verified changes:

Additional Context

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Greptile Summary

This PR adds a universal "all environments" dashboard view that aggregates per-environment snapshot data (containers, images, action items) behind a new /dashboard/environments endpoint, alongside live CPU/memory/disk metrics via WebSocket for each reachable environment. The backend fetches snapshots concurrently (4-way limit, 20 s timeout per environment) and gracefully marks unreachable environments as error or skipped rather than failing the whole response.

All five P0/P1 issues from the previous review round have been resolved: the new endpoint now declares both BearerAuth and ApiKeyAuth; summarizeEnvironmentOverviewInternal uses if/else so disabled environments are no longer double-counted; \"0\" is replaced with the localEnvironmentID package-level constant; pruningEnvironmentId is set synchronously before the await gap in confirmPrune; and void reloadVersion is read before the first await in overviewSummaryPromise, keeping the summary tiles reactive to manual refreshes.

Confidence Score: 5/5

Safe to merge — all previously flagged P0/P1 issues are resolved and no new blocking issues were found.

Every critical concern from the last review round (auth scheme, double-counting, magic string, prune race condition, stale summary tiles) is addressed in this version. The implementation is thorough, well-tested (service + handler tests covering the new endpoint and failure paths), and the concurrency model is safe. Remaining observations are P2 style notes only.

No files require special attention.

_{Reviews (5): Last reviewed commit: "feat: universal environment dashboard" | Re-trigger Greptile}

[kmendell]

• feat: universal environment dashboard #2241 👈 (View in Graphite)
• main

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[kmendell]

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[getarcaneappbot]

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[kmendell]

@greptileai

[github-actions]

This pull request has merge conflicts. Please resolve the conflicts so the PR can stay up-to-date and reviewed.

[github-actions]

This pull request has merge conflicts. Please resolve the conflicts so the PR can stay up-to-date and reviewed.