feat: post-logout redirect override + keep LoQE engine warm across previews

[v-kessler]

What

Two independent changes:

1. Post-logout redirect override (auth.ts) — adds optional idpPostLogoutRedirectUrl (absolute override) and idpDisablePostLogoutRedirect (omit the post_logout_redirect_uri param entirely) to AuthConfig, for IdPs whose allowed post-logout URLs are fixed or which reject any non-registered URL. Precedence: disable > absolute URL > derived default. Fully backward compatible (both fields optional).

2. Keep LoQE DuckDB engine warm (LoQEEngine.ts) — release() now defers teardown by a 60s grace period instead of destroying the engine the instant refCount hits 0; acquire() cancels the pending teardown. Preview open/close and table-to-table navigation reuse the warm engine, so the DuckDB WASM is not re-fetched/re-instantiated and extensions are not reloaded each time. forceDestroy()/resetDatabase() still tear down immediately.

BEGIN_COMMIT_OVERRIDE
feat(ui): add post-logout redirect override and disable options to auth config
fix(ui): keep LoQE DuckDB engine warm across previews with grace-period teardown
END_COMMIT_OVERRIDE

Summary by CodeRabbit

• New Features

  • Added configurable post-logout redirect behavior, including custom redirect URLs or the option to disable redirects.

• Bug Fixes

  • Improved preview lifecycle handling so the query engine remains available during brief transitions, reducing unnecessary reinitialization and improving responsiveness.

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Review details

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: cebe9532-6b9a-4004-b4fd-01bbd98eac97

📥 Commits

Reviewing files that changed from the base of the PR and between a94a58d and 7aecf50.

📒 Files selected for processing (1)

• src/plugins/auth.ts

Walkthrough

The PR defers LoQE engine destruction across brief idle periods and adds configurable OIDC post-logout redirect behavior through new authentication settings.

Changes

LoQE engine lifecycle

Layer / File(s)	Summary
Deferred engine teardown src/composables/loqe/LoQEEngine.ts	The engine cancels pending teardown when reacquired, schedules destruction after an idle grace period when unused, and clears the timer during forced destruction.

OIDC logout redirect configuration

Layer / File(s)	Summary
Post-logout redirect resolution src/plugins/auth.ts	AuthConfig supports disabling or overriding the logout redirect URI, and createAuth passes the resolved value to UserManagerSettings.

Estimated code review effort: 3 (Moderate) | ~20 minutes

Poem

I’m a bunny with a timer to spare,
Keeping warm engines hopping with care.
A logout path may bend or disappear,
With redirects chosen crystal-clear.
Hop, hop—configuration blooms this year!

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately summarizes both main changes: logout redirect override and keeping the LoQE engine warm across previews.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feat/post-logout-override-and-loqe-grace

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[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@src/plugins/auth.ts`:
- Around line 39-42: Update the Cognito branch in signOut to honor
config.idpDisablePostLogoutRedirect instead of falling back to
window.location.origin when post_logout_redirect_uri is undefined. Preserve the
existing logout_uri behavior when the flag is false, and ensure the disabled
state omits or otherwise avoids supplying a redirect URI.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: c9ca0ca2-0195-4786-a41e-c937fc18fb7e

📥 Commits

Reviewing files that changed from the base of the PR and between 762773a and a94a58d.

📒 Files selected for processing (2)

• src/composables/loqe/LoQEEngine.ts
• src/plugins/auth.ts