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-tauri/crates/psysonic-audio/src/progress_task.rs

@@ -12,6 +12,7 @@ use tauri::{AppHandle, Emitter, Runtime};
 
 use super::engine::AudioCurrent;
 use super::helpers::{ramp_sink_volume, ProgressPayload, MASTER_HEADROOM};
+use super::playback_rate::{effective_duration_secs, effective_position_secs, PlaybackRateAtomics};
 use super::state::ChainedInfo;
 
 /// Sink for the three progress events the task emits. Production wraps an
@@ -68,6 +69,7 @@ pub(crate) fn spawn_progress_task<E: ProgressEmitter>(
     gapless_switch_at: Arc<AtomicU64>,
     current_playback_url: Arc<Mutex<Option<String>>>,
     stream_playback_armed: Arc<AtomicBool>,
+    playback_rate: PlaybackRateAtomics,
 ) {
     // Keep progress aligned with audible output (ALSA/PipeWire/Pulse queue) on
     // Linux; mirrors the quantum policy used for stream open/reopen plus a small
@@ -196,10 +198,11 @@ pub(crate) fn spawn_progress_task<E: ProgressEmitter>(
 
             // Read playback snapshot under a single lock to minimize contention
             // with seek/play/pause commands that also touch `current`.
-            let (dur, paused_at) = {
+            let (base_dur, paused_at) = {
                 let cur = current_arc.lock().unwrap();
                 (cur.duration_secs, cur.paused_at)
             };
+            let dur = effective_duration_secs(base_dur, &playback_rate);
             let is_paused = paused_at.is_some();
 
             let pos_raw = if !stream_playback_armed.load(Ordering::Relaxed) {
@@ -207,7 +210,8 @@ pub(crate) fn spawn_progress_task<E: ProgressEmitter>(
             } else if let Some(p) = paused_at {
                 p
             } else {
-                (samples / divisor).min(dur.max(0.001))
+                effective_position_secs(samples / divisor, &playback_rate)
+                    .min(dur.max(0.001))
             };
             let progress_latency = if is_paused {
                 0.0
@@ -333,6 +337,7 @@ mod tests {
         gapless_switch_at: Arc<AtomicU64>,
         playback_url: Arc<Mutex<Option<String>>>,
         stream_playback_armed: Arc<AtomicBool>,
+        playback_rate: PlaybackRateAtomics,
     }
 
     impl TaskHarness {
@@ -362,6 +367,7 @@ mod tests {
                 gapless_switch_at: Arc::new(AtomicU64::new(0)),
                 playback_url: Arc::new(Mutex::new(None)),
                 stream_playback_armed: Arc::new(AtomicBool::new(true)),
+                playback_rate: PlaybackRateAtomics::new(),
             }
         }
 
@@ -381,6 +387,7 @@ mod tests {
                 self.gapless_switch_at.clone(),
                 self.playback_url.clone(),
                 self.stream_playback_armed.clone(),
+                self.playback_rate.clone(),
             );
         }
     }