feat(ui): add media support and sanitization to Telegram feed (#101)

[lspassos1]

This PR enhances the Telegram Intel feed with media support and improved content safety.

Key changes:

• Added support for displaying images and videos from Telegram posts.
• Implemented lazy loading for media elements.
• Integrated safeHtml() for sanitizing post content.
• Added topic-based badge categorization.
• Improved layout for multi-media layouts.

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[koala73]

Hey @lspassos1, thanks for the continued contributions! Really appreciate how active you've been.

We reviewed this PR and have some feedback before we can merge:

Scope

This PR bundles several unrelated changes beyond the Telegram media support: font imports, map section overhaul, grid span selectors, vessel popup (USNI) styles, and fullscreen height tweaks. Could you split these into focused PRs? It makes review and rollback much easier.

Security

• Unsanitized URL in window.open: The img src correctly uses sanitizeUrl(url), but the click handler passes the raw url:

  onClick: () => window.open(url, '_blank')

  Should be sanitizeUrl(url).

• External CDN font imports: Adding @import url('https://fonts.googleapis.com/...') and cdn.jsdelivr.net in CSS is render-blocking and introduces third-party tracking. If these fonts are needed, they should go as <link rel="preload"> in index.html.

CSS Issues

• The @import lines at the top have a leading space, which can cause them to be ignored by some CSS parsers (they must be the very first statements).
• .telegram-intel-topic and .telegram-intel-time are each defined twice in the diff.
• The map resize handle is set to display: none and all its styles removed. This drops existing functionality without explanation.

Logic

• 600000 (10 min for "LIVE" status) should be a named constant.
• response.enabled !== false is looser than the original response.enabled check (it's truthy for undefined/null). Was this intentional?
• Does the TelegramItem type include mediaUrls? If not, the type definition needs updating.

Thanks again for the work here. The Telegram media support itself is solid. Let us know if you have questions on any of the above!