feat(web): My Wave button, mood picker and endless wave playback (M4)

- WaveButton: TypeScript port of the prototype's canvas animation
  (orb and liquid), breathing at rest, pulsing to the track's BPM and
  energy in the cover palette, following the cursor, pressing with a
  spring; reduced motion and hidden tabs slow or stop it
- home: the wave in the centre with activity and mood chips; changing
  them while playing rebuilds the upcoming tracks without stopping
- player wave mode: asks for the next batch when two tracks are left,
  sends complete / skip / early skip / like / dislike as feedback and
  refreshes the queue right after a reaction or an early skip
- tracks expose bpm, energy and loudness once analysed; library page
  shows analysis progress and 7-day wave metrics; wave style setting

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

packages/api-client/src/generated/schema.ts

@@ -1235,6 +1235,8 @@ export interface components {
             /** @description Подписанная ссылка на аудио (12 ч); null — трек недоступен */
             stream_url: string | null;
             reaction: components["schemas"]["Reaction"] | null;
+            /** @description Аудиопризнаки (после анализа) — для анимации волны и выравнивания громкости */
+            features: components["schemas"]["TrackFeatures"] | null;
         };
         Artist: {
             /** Format: uuid */
@@ -1281,6 +1283,11 @@ export interface components {
             corrected_query: string | null;
             next_cursor: string | null;
         };
+        TrackFeatures: {
+            bpm: number | null;
+            energy: number | null;
+            loudness_lufs: number | null;
+        };
         /** @enum {string} */
         StreamQuality: "auto" | "original" | "high" | "medium" | "low";
         /** @enum {string} */