feat(playback): global speed with three strategies (#852)

* feat(playback): global speed with three strategies

Add Settings → Audio and player-bar controls for global playback speed
(speed with auto pitch correction as default, varispeed, manual pitch shift).
Time-stretch runs on a background worker; Orbit sessions force 1.0× passthrough.

* fix(playback): align seekbar, seek, and progress on content timeline

Unify UI timebase across varispeed and preserve strategies: full-track
duration, speed-scaled progress for DSP paths, and content-timeline seeks
without varispeed scaling. Reset the sample counter after seek so clicks
land correctly; restart playback on strategy/enable changes instead of
fragile hot-switching.

* fix(ui): anchor playback speed popover like volume controls

Replace the centered EQ-style modal with a player-bar popover (outside
click, Escape, reposition on scroll). Show compact controls in the bar
and overflow menu; keep strategy hints and labels in Settings only.

* docs(release): CHANGELOG and credits for playback speed (PR #852)

* docs(changelog): add playback speed entry for PR #852

* fix(clippy): simplify raw_counter_samples branch for CI

Collapse duplicate if branches flagged by clippy::if-same-then-else.

* fix(ui): wheel on pitch slider adjusts pitch in speed popover

In compact player-bar controls, scroll over the pitch row changes pitch;
elsewhere in the panel changes speed. Stop propagation so overflow menu
wheel does not tweak volume.

* fix(playback): address PR #852 review and drop ineffective dynamic imports

Translate playback-rate strings for de/fr/es/zh/nb/nl/ro; restamp sample
counter on live preserve-path speed changes; use neutral rate atomics for
radio progress; static-import playerStore in playListenSession (move preview
volume sync to previewPlayerVolumeSync side-effect module).

* fix(i18n): translate playback-rate strategy labels in all locales

Replace leftover English Varispeed/Pitch strings in ru and other non-en
settings blocks so popover strategy buttons and hints read natively.

* fix(i18n): refine German varispeed label to "Tonhöhe folgt dem Tempo"

---------

Co-authored-by: Psychotoxical <171614930+Psychotoxical@users.noreply.github.com>

src/store/previewStore.ts

@@ -4,7 +4,7 @@ import { create } from 'zustand';
 import { invoke } from '@tauri-apps/api/core';
 import { usePlayerStore } from './playerStore';
 import { useAuthStore } from './authStore';
-import { useOrbitStore } from './orbitStore';
+import { isOrbitPlaybackSyncActive } from '../utils/orbit';
 
 /** Minimal track info needed to surface the preview in the player bar UI. */
 export interface PreviewingTrack {
@@ -55,7 +55,7 @@ const PREVIEW_VOLUME_MATCH = true;
  * preview-specific gain, so we pre-multiply here). Master headroom is added on
  * the Rust side.
  */
-function computePreviewVolume(): number {
+export function computePreviewVolume(): number {
   const auth = useAuthStore.getState();
   let volume = usePlayerStore.getState().volume;
   if (PREVIEW_VOLUME_MATCH && auth.normalizationEngine === 'loudness') {
@@ -82,10 +82,7 @@ export const usePreviewStore = create<PreviewState>((set, get) => ({
     // preview started by a guest would yank the host's track out from
     // under them. UI buttons are hidden via `[data-orbit-active]` CSS;
     // this guards keyboard shortcuts / programmatic callers.
-    const orbit = useOrbitStore.getState();
-    const inOrbit = (orbit.role === 'host' || orbit.role === 'guest')
-      && (orbit.phase === 'active' || orbit.phase === 'joining' || orbit.phase === 'starting');
-    if (inOrbit) return;
+    if (isOrbitPlaybackSyncActive()) return;
 
     const current = get().previewingId;
     if (current === song.id) {
@@ -158,14 +155,3 @@ export const usePreviewStore = create<PreviewState>((set, get) => ({
     set({ previewingId: null, previewingTrack: null, elapsed: 0, audioStarted: false });
   },
 }));
-
-// Keep the preview sink in sync with player volume slider movements while a
-// preview is in flight. Without this the Rust preview Sink stays at whatever
-// level was set at `audio_preview_play` — slider drags only ramp the main
-// sink. Auth/normalization changes during preview are intentionally ignored
-// (preview is short and the case is rare).
-usePlayerStore.subscribe((state, prev) => {
-  if (state.volume === prev.volume) return;
-  if (!usePreviewStore.getState().previewingId) return;
-  invoke('audio_preview_set_volume', { volume: computePreviewVolume() }).catch(() => {});
-});