perf: optimize framework and router

[mohamedmansour]

• Replace 28-entry ARIA lookup table with algorithmic generation, no more regex. (-1KB)
• Extract shared applyParamsQueryState helper eliminating router code duplication
• Parallelize component loading with Promise.all and per-item abort guards
• Replace DOM querySelector dedup with in-memory Set for CSS/style injection
• Convert templateDOMCache to WeakMap for GC-friendly caching
• Apply charCodeAt guard to resolveRepeatValue hot path
• Remove dead waitForRenderReady method
• Add ssrPreloadsCleared flag to skip redundant DOM queries
• Fix loadPromises memory leak in destroy()
• Cache basePath field to avoid repeated nullish coalescing

[Copilot]

Pull request overview

Performance-focused updates across the WebUI router and framework runtime to reduce DOM queries, cut duplication, and tighten hot-path checks while keeping existing behavior.

Changes:

• Router: extract shared param/query/state application, cache basePath, add in-memory CSS/style dedup sets, parallelize component preloading, and fix destroy() retaining in-flight ensureLoaded() promises.
• Framework: micro-optimize resolveRepeatValue, switch SSR template DOM cache to a WeakMap, and generate ARIA attribute names algorithmically in toKebabCase.
• Cleanup: remove unused router helper (waitForRenderReady) and add an SSR-preload clearing guard.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 3 comments.

File	Description
packages/webui-router/src/router.ts	Refactors route state application, reduces DOM query overhead via Sets, parallelizes preload, and improves teardown by clearing more caches.
packages/webui-framework/src/element/diff.ts	Hot-path optimization for repeat-scope dotted path resolution.
packages/webui-framework/src/element.ts	Makes SSR template DOM cache GC-friendly via WeakMap; clarifies disconnect behavior.
packages/webui-framework/src/decorators.ts	Shrinks ARIA reflection mapping by generating aria-* names algorithmically.