feat(lecteur): menu FAB partage /watch et /shorts

- PlayerMenuComponent : FAB circulaire translucide (haut-gauche) + panneau
  deroulant, commun aux deux pages (position, style, open/close, clic exterieur)
- /shorts : consolidation de tous les boutons (fournisseurs, langue, actions)
  dans le menu FAB ; suppression du rail a droite et de la rangee du haut
- /watch : actions (cinema, qualite, j'aime, playlist, transcription,
  telechargement, partage, ouvrir) deplacees dans le menu FAB
- AddToPlaylistComponent : variante menuItem pour s'integrer au menu
- styles .pm-item/.pm-sep/.pm-section-label dans index.css

src/components/shorts/watch-short.component.ts

@@ -16,6 +16,7 @@ import { Video } from '../../models/video.model';
 import { shortsFeedAccepts, isPlayable as isPlayablePolicy, type PlayableContext } from '../../app/shared/utils/section-policy';
 import { SHORT_TO_LONG, type ProviderId } from '../../app/shared/providers/provider-ids';
 import { dailymotionEmbedBase } from '../../app/shared/providers/dailymotion-player';
+import { PlayerMenuComponent } from '../../app/shared/components/player-menu/player-menu.component';
 import { SearchService } from '../../app/search/search.service';
 import { ChannelProviderFactory } from '../../app/core/providers/channel/channel-provider.factory';
 import {
@@ -87,7 +88,7 @@ const SHORTS_QUERIES: Record<string, string[]> = {
   selector: 'app-watch-short',
   standalone: true,
   changeDetection: ChangeDetectionStrategy.OnPush,
-  imports: [CommonModule, RouterLink],
+  imports: [CommonModule, RouterLink, PlayerMenuComponent],
   templateUrl: './watch-short.component.html'
 })
 export class WatchShortComponent implements OnDestroy {
@@ -274,6 +275,18 @@ export class WatchShortComponent implements OnDestroy {
       return this.langFilter() === 'profile' ? `Filtre actif : ${base} (profil)` : `Filtre actif : ${base}`;
     } catch { return 'Filtre de langues'; }
   });
+
+  /** Libellé court du mode de langue pour le menu FAB (« Français »…). */
+  readonly langFilterShort = computed(() => {
+    switch (this.langFilter()) {
+      case 'profile': return 'Profil';
+      case 'fr': return 'Français';
+      case 'en': return 'Anglais';
+      case 'fren': return 'FR + EN';
+      case 'all': return 'Toutes';
+      default: return this.langFilter();
+    }
+  });
   readonly current = computed<Video | null>(() => {
     const list = this.items();
     const i = this.index();
@@ -955,9 +968,6 @@ export class WatchShortComponent implements OnDestroy {
     try { this.isFullscreen.set(!!document.fullscreenElement); } catch {}
   };
 
-  toggleMenu(): void {
-    this.menuOpen.update(o => !o);
-  }
   closeMenu(): void {
     this.menuOpen.set(false);
   }