feat(web): file card and inline text preview on the public file page

[Zach Dunn (zachdunn)]

Summary

On the public file page (/f/<workspace>/<key>), non-media files no longer show a generic "Preview unavailable" fallback.

• File card: MediaStage's kind === "file" branch now shows the file's identity — title = filename, body = <TYPE> · <size>, link = the download URL — via the existing MediaFallback component (no restyle). The gallery item page (/g/:id/:item) gets the same card via the same new props.
• Inline text preview: files whose content type is exactly text/plain, text/markdown, text/csv, or application/json and whose size is at most 256 KiB get an inline, server-rendered preview. The /f/ route fetches the object body SSR from storage (server-to-server, no CORS concern) with a 5s timeout, decodes it as UTF-8, and renders it as an Astro-escaped, scrollable <pre> block (no set:html). Markdown is shown as source, never rendered. Any fetch failure, timeout, non-2xx response, or oversized body falls back to the file card. A small info line (type, size, download link) sits below the preview.

Commands run

• pnpm --filter @uploads/web astro sync
• pnpm --filter @uploads/web typecheck — 0 errors
• pnpm test (root) — all passing
• pnpm format:check

Refs #946

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🦋 Changeset detected

Latest commit: 828db72

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@buildinternet/uploads	Patch

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