feat: add demo shutdown notice banner across all pages

[josecelano]

Closes #228

Adds a prominent full-width banner at the very top of every page (above the header) notifying visitors that all Torrust public demo services are currently shut down.

Changes

1. New banner in layout (src/routes/+layout.svelte) — Dark-themed banner with red left accent bar and red border, positioned above the navigation header so it's visible on every page.

2. Removed old subtle notice (src/lib/components/organisms/Hero.svelte) — The tiny .demo-notice paragraph from the hero section has been removed (was hard to read and easy to miss).

3. Demo links redirected to issue Add banner on homepage informing that all Torrust public demos are currently down #228 — All "Live demo" buttons and demo URLs now point to the issue instead of broken demo endpoints:

   • HeroCard live demo buttons (Index & Tracker)
   • TorrustIndexPost.svelte demo site link
   • constants.ts demo fields in both index and tracker comparison tables

Revert

See the comment on issue #228 for a full revert checklist to undo these changes when the demos are back online.

[Copilot]

Pull request overview

Adds a prominent, site-wide notice that Torrust public demo services are shut down, and redirects several demo URLs to the tracking issue (#228) to avoid sending users to broken endpoints.

Changes:

• Added a full-width shutdown banner above the header in the root layout.
• Repointed “demo/live demo” URLs in key homepage components and comparison-table data to issue #228.
• Minor homepage styling change (currently introduces a duplicated selector / likely unintended styling regression).

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
src/routes/+layout.svelte	Adds the global demo shutdown banner and its styling.
src/routes/(home)/+page.svelte	Updates homepage styling (currently duplicates .container selector, likely meant to style h2).
src/lib/constants/constants.ts	Redirects index/tracker table demo URLs to issue #228.
src/lib/components/singletons/TorrustIndexPost.svelte	Redirects the “demo site” link to issue #228 (copy still claims the demo is running).
src/lib/components/organisms/Hero.svelte	Redirects HeroCard “Live demo” targets to issue #228 (button label remains “Live demo”).

Comments suppressed due to low confidence (1)

src/routes/(home)/+page.svelte:63

• The styles define .container twice; the second block looks like it was intended for the h2 but now applies font-size/font-weight to the whole container, likely affecting all nested text and overriding earlier container padding.

	.container {
		text-align: center;
		color: rgba(245, 245, 245, 0.96);
		padding-top: 4rem;
		font-size: 1.8rem;

---

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[josecelano]

Fixed by adding rel="noopener noreferrer" to the banner link in src/routes/+layout.svelte.

[josecelano]

Updated the following blog posts to replace or note dead demo links:

• src/routes/blog/released-v3-0-0/+page.svelte — demo link now points to issue Add banner on homepage informing that all Torrust public demos are currently down #228
• src/routes/blog/live-demo-beta-v3/+page.svelte — both demo links now point to issue Add banner on homepage informing that all Torrust public demos are currently down #228
• src/routes/blog/new-torquest-tracker-demo/+page.svelte — changed "is still available at" to "was available at" and redirected link to issue Add banner on homepage informing that all Torrust public demos are currently down #228
• src/routes/blog/vortex-rust-bittorrent-client-review/+page.svelte — "Torrust Demo Index" link and torrent index link now point to issue Add banner on homepage informing that all Torrust public demos are currently down #228

Historical code examples (like wget commands) were left as-is since they document the actual commands that were run at the time.

[josecelano]

Fixed. Updated the text in src/lib/components/singletons/TorrustIndexPost.svelte to say "We previously ran a demo site on Digital Ocean... though all public demo services are currently shut down."

[josecelano]

Fixed. Updated HeroCard.svelte to detect when the demo link points to the shutdown issue and display "Unavailable" instead of "Live demo", with a dimmed/greyed-out appearance (reduced opacity, grey background, no pointer-events).

[josecelano]

ACK 26c69f7