[P1] Fix deployment base paths, route metadata, sitemap, and canonical URL generation

[Banegasn]

Objective

Make every prerendered demo route load correctly at the canonical deployment location and expose correct search/social metadata.

Evidence

• README documents GitHub Pages at /components/, while Angular github-pages baseHref and source <base> use /; the current custom-domain redirect further obscures the intended canonical root.
• /progress is declared twice and the first declaration carries Divider metadata.
• The sitemap omits 14 public routes.
• og:url is static, while route handling updates only title/description.

Scope

Choose/document the canonical domain/base-path policy; make build configuration environment-specific; generate routes/sitemap/canonical/OG URLs from one public route catalog; smoke-test direct navigation, refresh, assets, and prerendered metadata under the deployed prefix.

Acceptance criteria

• Every public route is unique and has correct title/description/canonical/OG URL.
• Sitemap and route inventory have exact parity.
• Root load, assets, router navigation, and direct refresh work at the canonical base path.
• Local development remains rooted at / without manual edits.
• CI serves the built artifact under the production prefix and crawls all routes.
• README/live-demo links match the chosen HTTPS canonical URL.

Dependencies

Blocked by #5 and #6; coordinate performance/visual work with #17.

Autonomous execution contract

Do not hard-code the route list in multiple new places. Generate consumers from one typed catalog.