Fix aria-label interpolation and missing "opens in new tab" on external links

[Copilot]

Svelte does not interpolate {expr} inside quoted attribute strings — they are treated as literals. Four aria-label attributes were broken in this way, and one external-link label was missing the "opens in new tab" annotation required for WCAG consistency.

Changes

• ModelDetailsModal.svelte / ModelCard.svelte: Change aria-label="{model.license} ..." → aria-label={...${model.license}...} so the actual license value reaches assistive tech instead of the literal string {model.license}.
• social-media.svelte: Same fix for {title} — aria-label="{title} (opens in new tab)" → aria-label={${title} (opens in new tab)}.
• download-dropdown.svelte: Add (opens in new tab) to the GitHub Releases link aria-label, consistent with all other target="_blank" links in the codebase.

<!-- Before: Svelte treats {model.license} as a literal string -->
aria-label="{model.license} license (opens in new tab)"

<!-- After: properly interpolated -->
aria-label={`${model.license} license (opens in new tab)`}

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Project	Deployment	Actions	Updated (UTC)
foundry-local	Ready	Preview, Comment	Mar 24, 2026 1:59am