Bufix/routing system

[hexplus]

Description

Fixes a router bug where the Route outlet permanently froze after navigating away from a nested route. Navigating from a nested child route (e.g. /ui/button) to a top-level route could wedge the outlet on the old layout — every later navigation changed the URL but not the rendered page.

Root cause: Route.update is async (it awaits lazy component loads) and used an isUpdating/pendingUpdate flag pair plus a route.path === currentPath insert guard. The startup sequence (createRouter sets the route to /, then a queueMicrotask navigates to the real deep URL) produces overlapping update() calls; under that timing race isUpdating could get stuck true (every later update short-circuited) and stale route content could be inserted. This reproduced reliably in a real browser but not in happy-dom tests, whose microtask timing dodged the race.

Fix: Replaced the flag-based concurrency in both Route and Outlet with a monotonic per-update sequence ("latest wins") — a load superseded mid-flight is discarded and only the latest navigation commits to the DOM. Outlet also now clears + dispose()s stale child content when leaving the nested area (previously it kept stale content and leaked the child's reactive bindings/listeners on every nested navigation) and skips redundant re-renders of the same child.

Bumped sibujs to 3.2.1, updated CHANGELOG, and added regression tests (tests/router.nested-to-top.test.ts): nested→top swap + a rapid-burst "latest wins" case. Full router suite (221 tests) passes; verified end-to-end in the browser (nested→top, top→nested, sidebar nested→nested, rapid-fire bursts, back/forward).

Related Issue

Closes #

Type of Change

• Bug fix
• New feature
• Breaking change
• Documentation update

Checklist

• I have read CONTRIBUTING.md
• My code builds without errors
• I have tested my changes
• I have updated documentation if needed