exp(orbit): host merge, guest queue view, settings popover, i18n

Guest suggestions now auto-merge into the host's play queue at random
positions inside the upcoming range, so they actually surface alongside
host-picked tracks instead of piling up at the end. Per-item dedupe via
addedBy:addedAt:trackId keys survives reshuffles.

Guests get a read-only mirror of the session in place of their queue
panel — live-card for the host's current track, suggestion list with
submitter attribution, and a footer reminding them the host owns
playback. Track metadata is resolved lazily and cached locally.

New host-only settings popover (gear in the bar) with auto-approve and
auto-shuffle toggles plus a "Shuffle now" action. Settings live in the
OrbitState blob and push immediately to Navidrome; missing fields on
older blobs default to "both on".

15-min shuffle now touches the real playerStore queue via a new
shuffleUpcomingQueue action — previous behaviour only reshuffled the
guest-facing suggestion history. A manual shuffle is available from the
settings popover so the interval can be verified without waiting.

Start-modal reworked into a single step: share-link is visible and
copy-able from the start, auto-copied on Start if the host hasn't
already hit Copy. Link carries a live name-derived slug (parser strips
it, SID is authoritative). LAN/remote-server hint above the facts.
Random session-name suggester pulls from three pattern pools for ~10k
unique combinations.

All user-visible Orbit strings moved to a dedicated orbit i18n
namespace (en + de); other locales fall back to en via i18next.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/components/QueuePanel.tsx

@@ -1,8 +1,8 @@
 import React, { useState, useRef, useMemo, useEffect } from 'react';
 import { Track, usePlayerStore, songToTrack } from '../store/playerStore';
-import { Play, Music, Star, X, Trash2, Save, FolderOpen, Shuffle, Infinity, Waves, MicVocal, ListMusic, Check, ListPlus, ArrowUpToLine, Radio, HardDrive, ChevronDown, Info, Share2, Orbit as OrbitIcon } from 'lucide-react';
-import OrbitStartModal from './OrbitStartModal';
 import { useOrbitStore } from '../store/orbitStore';
+import OrbitGuestQueue from './OrbitGuestQueue';
+import { Play, Music, Star, X, Trash2, Save, FolderOpen, Shuffle, Infinity, Waves, MicVocal, ListMusic, Check, ListPlus, ArrowUpToLine, Radio, HardDrive, ChevronDown, Info, Share2 } from 'lucide-react';
 import { buildCoverArtUrl, coverArtCacheKey, getAlbum, getPlaylists, getPlaylist, updatePlaylist, deletePlaylist, SubsonicPlaylist } from '../api/subsonic';
 import { usePlaylistStore } from '../store/playlistStore';
 import { useCachedUrl } from './CachedImage';
@@ -201,9 +201,6 @@ function QueueHeader({ queue, queueIndex, showRemainingTime, setShowRemainingTim
 
   const dur = showRemainingTime ? `-${fmt(Math.floor(remainingSecs))}` : fmt(Math.floor(totalSecs));
 
-  const orbitRole = useOrbitStore(s => s.role);
-  const [startOpen, setStartOpen] = useState(false);
-
   return (
     <div className="queue-header">
       <div style={{ display: "flex", flexDirection: "column", minWidth: 0, flex: 1 }}>
@@ -230,23 +227,23 @@ function QueueHeader({ queue, queueIndex, showRemainingTime, setShowRemainingTim
           </div>
         )}
       </div>
-      {orbitRole === null && (
-        <button
-          type="button"
-          className="queue-header-orbit-btn"
-          onClick={() => setStartOpen(true)}
-          data-tooltip="Start a session"
-          aria-label="Start a session"
-        >
-          <OrbitIcon size={14} />
-        </button>
-      )}
-      {startOpen && <OrbitStartModal onClose={() => setStartOpen(false)} />}
     </div>
   );
 }
 
 export default function QueuePanel() {
+  const orbitRole = useOrbitStore(s => s.role);
+  if (orbitRole === 'guest') {
+    return (
+      <aside className="queue-panel queue-panel--orbit-guest">
+        <OrbitGuestQueue />
+      </aside>
+    );
+  }
+  return <QueuePanelHostOrSolo />;
+}
+
+function QueuePanelHostOrSolo() {
   const { t } = useTranslation();
   const navigate = useNavigate();
   const queue = usePlayerStore(s => s.queue);