polish(playlists): compact header actions + open-on-YouTube link

The detail header overflowed the items column. Make the secondary actions icon-only
with tooltips (Sync/Export, Reset to YouTube, Delete) keeping only Play all labeled;
replace the long 'Unsynced changes' / 'Synced from YouTube' chips with a compact
accent 'Unsynced' dot (tooltip explains). Add an open-on-YouTube external-link button
next to the name + edit pencil (tooltip), shown for any YouTube-linked playlist.

frontend/src/components/Playlists.tsx

@@ -20,6 +20,7 @@ import {
   ArrowDown,
   ArrowUp,
   Check,
+  ExternalLink,
   GripVertical,
   ListPlus,
   Pencil,
@@ -320,9 +321,8 @@ export default function Playlists({ canWrite }: { canWrite: boolean }) {
   }, [sortedPlaylists]);
 
   const builtin = detail?.kind === "watch_later";
-  // YouTube-mirrored playlists can be edited locally and synced back (the read-sync skips
+  // YouTube-mirrored playlists can be edited locally and synced back (the read-sync skips a
-  // a dirty mirror so it won't clobber unpushed edits); the chip just marks their origin.
+  // dirty mirror so it won't clobber unpushed edits); the YT-link button marks their origin.
-  const mirrored = detail?.source === "youtube";
   const editable = !builtin;
   const linked = editable && !!detail?.yt_playlist_id;
   const [syncing, setSyncing] = useState(false);
@@ -651,7 +651,7 @@ export default function Playlists({ canWrite }: { canWrite: boolean }) {
                     className="text-lg font-semibold bg-card border border-border rounded-md px-2 py-0.5 outline-none focus:border-accent"
                   />
                 ) : (
-                  <div className="flex items-center gap-2">
+                  <div className="flex items-center gap-2 min-w-0">
                     <h2 className="text-lg font-semibold truncate">{plName(detail)}</h2>
                     {editable && (
                       <button
@@ -660,17 +660,30 @@ export default function Playlists({ canWrite }: { canWrite: boolean }) {
                           setRenaming(true);
                         }}
                         title={t("playlists.rename")}
-                        className="text-muted hover:text-fg"
+                        aria-label={t("playlists.rename")}
+                        className="shrink-0 text-muted hover:text-fg"
                       >
                         <Pencil className="w-3.5 h-3.5" />
                       </button>
                     )}
+                    {detail.yt_playlist_id && (
+                      <a
+                        href={`https://www.youtube.com/playlist?list=${detail.yt_playlist_id}`}
+                        target="_blank"
+                        rel="noreferrer noopener"
+                        title={t("playlists.openOnYoutube")}
+                        aria-label={t("playlists.openOnYoutube")}
+                        className="shrink-0 text-muted hover:text-accent"
+                      >
+                        <ExternalLink className="w-3.5 h-3.5" />
+                      </a>
+                    )}
                   </div>
                 )}
                 <div className="text-xs text-muted mt-0.5">
                   {t("playlists.itemCount", { count: items.length })}
                 </div>
-                <div className="flex gap-2 mt-3 flex-wrap">
+                <div className="flex gap-1.5 mt-3 flex-wrap items-center">
                   <button
                     onClick={() => items.length && setPlayingIndex(0)}
                     disabled={!items.length}
@@ -683,7 +696,8 @@ export default function Playlists({ canWrite }: { canWrite: boolean }) {
                       onClick={pushToYoutube}
                       disabled={pushing}
                       title={linked ? t("playlists.pushToYoutube") : t("playlists.exportToYoutube")}
-                      className={`inline-flex items-center gap-1.5 text-xs px-3 py-1.5 rounded-lg border transition disabled:opacity-40 ${
+                      aria-label={linked ? t("playlists.pushToYoutube") : t("playlists.exportToYoutube")}
+                      className={`inline-flex items-center justify-center p-2 rounded-lg border transition disabled:opacity-40 ${
                         detail.dirty
                           ? "border-accent text-accent hover:bg-accent/10"
                           : "border-border text-muted hover:text-fg hover:border-accent"
@@ -696,37 +710,37 @@ export default function Playlists({ canWrite }: { canWrite: boolean }) {
                       ) : (
                         <Upload className="w-3.5 h-3.5" />
                       )}
-                      {linked ? t("playlists.pushToYoutube") : t("playlists.exportToYoutube")}
+                    </button>
+                  )}
+                  {linked && detail.dirty && (
+                    <button
+                      onClick={revertToYoutube}
+                      disabled={reverting}
+                      title={t("playlists.revert")}
+                      aria-label={t("playlists.revert")}
+                      className="inline-flex items-center justify-center p-2 rounded-lg border border-border text-muted hover:text-fg hover:border-accent transition disabled:opacity-40"
+                    >
+                      <RotateCcw className={`w-3.5 h-3.5 ${reverting ? "animate-spin" : ""}`} />
                     </button>
                   )}
                   {editable && (
                     <button
                       onClick={deletePlaylist}
-                      className="inline-flex items-center gap-1.5 text-xs px-3 py-1.5 rounded-lg border border-border text-muted hover:text-fg hover:border-accent transition"
+                      title={t("playlists.delete")}
+                      aria-label={t("playlists.delete")}
+                      className="inline-flex items-center justify-center p-2 rounded-lg border border-border text-muted hover:text-red-400 hover:border-red-400/50 transition"
                     >
-                      <Trash2 className="w-3.5 h-3.5" /> {t("playlists.delete")}
+                      <Trash2 className="w-3.5 h-3.5" />
                     </button>
                   )}
                   {linked && detail.dirty && (
-                    <>
+                    <span
-                      <button
+                      title={t("playlists.unsyncedHint")}
-                        onClick={revertToYoutube}
+                      className="inline-flex items-center gap-1.5 text-[11px] text-accent ml-1"
-                        disabled={reverting}
-                        title={t("playlists.revert")}
-                        className="inline-flex items-center gap-1.5 text-xs px-3 py-1.5 rounded-lg border border-border text-muted hover:text-fg hover:border-accent transition disabled:opacity-40"
                     >
-                        <RotateCcw className={`w-3.5 h-3.5 ${reverting ? "animate-spin" : ""}`} />
+                      <span className="w-1.5 h-1.5 rounded-full bg-accent" />
-                        {t("playlists.revert")}
-                      </button>
-                      <span className="inline-flex items-center gap-1.5 text-[11px] px-2.5 py-1.5 rounded-lg text-accent">
                       {t("playlists.unsynced")}
                     </span>
-                    </>
-                  )}
-                  {mirrored && (
-                    <span className="inline-flex items-center gap-1.5 text-[11px] px-2.5 py-1.5 rounded-lg text-muted">
-                      <Youtube className="w-3.5 h-3.5" /> {t("playlists.ytReadonly")}
-                    </span>
                   )}
                 </div>
               </div>

frontend/src/i18n/locales/de/playlists.json

@@ -19,7 +19,9 @@
   "addToPlaylist": "Zur Wiedergabeliste hinzufügen",
   "exportToYoutube": "Zu YouTube exportieren",
   "pushToYoutube": "Mit YouTube synchronisieren",
-  "unsynced": "Nicht synchronisierte Änderungen",
+  "unsynced": "Nicht synchronisiert",
+  "unsyncedHint": "Du hast lokale Änderungen, die noch nicht mit YouTube synchronisiert sind.",
+  "openOnYoutube": "Auf YouTube öffnen",
   "revert": "Von YouTube zurücksetzen",
   "revertTitle": "Lokale Änderungen verwerfen?",
   "revertMsg": "Dies lädt die Wiedergabeliste von YouTube neu und verwirft deine nicht synchronisierten lokalen Änderungen (Reihenfolge, Hinzufügungen, Entfernungen, Umbenennung). Fortfahren?",

frontend/src/i18n/locales/en/playlists.json

@@ -19,7 +19,9 @@
   "addToPlaylist": "Add to playlist",
   "exportToYoutube": "Export to YouTube",
   "pushToYoutube": "Sync to YouTube",
-  "unsynced": "Unsynced changes",
+  "unsynced": "Unsynced",
+  "unsyncedHint": "You have local changes not yet synced to YouTube.",
+  "openOnYoutube": "Open on YouTube",
   "revert": "Reset to YouTube",
   "revertTitle": "Discard local changes?",
   "revertMsg": "This reloads the playlist from YouTube and discards your unsynced local changes (order, additions, removals, rename). Continue?",

frontend/src/i18n/locales/hu/playlists.json

@@ -19,7 +19,9 @@
   "addToPlaylist": "Hozzáadás listához",
   "exportToYoutube": "Exportálás YouTube-ra",
   "pushToYoutube": "Szinkron YouTube-ra",
-  "unsynced": "Nem szinkronizált változások",
+  "unsynced": "Nincs szinkronizálva",
+  "unsyncedHint": "Vannak helyi módosításaid, amelyek még nincsenek a YouTube-ra szinkronizálva.",
+  "openOnYoutube": "Megnyitás YouTube-on",
   "revert": "Visszaállítás YouTube-ról",
   "revertTitle": "Eldobod a helyi módosításokat?",
   "revertMsg": "Ez újratölti a listát a YouTube-ról, és eldobja a nem szinkronizált helyi módosításaidat (sorrend, hozzáadás, eltávolítás, átnevezés). Folytatod?",