v3: native bandcamp playback and a queue in the global player

The player now holds a queue instead of a single item, so albums play
through and single tracks share the same code path. Adds a "stream" item
kind for expiring, remotely-hosted sources: Bandcamp signs its mp3 URLs
for ~24h, so an item carries the page it came from and re-resolves itself
on error or on a stale restored session, falling back to the iframe embed
if that fails too.

Gated behind GERBEUR_BANDCAMP_PLAYER (default "embed"), injected into a
meta tag the same way as site-name/site-emoji.

Also: player header gains artwork and a subtitle, volume persists across
queue advances and reloads, and cross-origin streams get a plain seek bar
rather than a waveform that can never decode.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SbtjNsT5wvuABnfqhegZEJ

vite.config.ts

@@ -4,6 +4,7 @@ import { lingui } from "@lingui/vite-plugin";
 
 const SITE_NAME = process.env.GERBEUR_SITE_NAME || "gerbeur";
 const SITE_EMOJI = process.env.GERBEUR_SITE_EMOJI || "🚚";
+const BANDCAMP_PLAYER = process.env.GERBEUR_BANDCAMP_PLAYER?.trim() === "native" ? "native" : "embed";
 
 // Cache-busting token for the favicon URLs (see index.html). Changes when the
 // emoji changes, so browsers don't keep serving a stale cached icon. Mirrors
@@ -49,6 +50,7 @@ export default defineConfig({
               .replaceAll("__SITE_NAME__", SITE_NAME)
               .replaceAll("__SITE_EMOJI__", SITE_EMOJI)
               .replaceAll("__ICON_VERSION__", ICON_VERSION)
+              .replaceAll("__BANDCAMP_PLAYER__", BANDCAMP_PLAYER)
             : html,
       },
     },