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/Cargo.lock

@@ -2790,6 +2790,23 @@ dependencies = [
  "autocfg",
 ]
 
+[[package]]
+name = "microfft"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f2b6673eb0cc536241d6734c2ca45abfdbf90e9e7791c66a36a7ba3c315b76cf"
+dependencies = [
+ "cfg-if",
+ "num-complex",
+ "static_assertions",
+]
+
+[[package]]
+name = "micromath"
+version = "2.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c3c8dda44ff03a2f238717214da50f65d5a53b45cd213a7370424ffdb6fae815"
+
 [[package]]
 name = "mime"
 version = "0.3.17"
@@ -2922,6 +2939,16 @@ dependencies = [
  "num-traits",
 ]
 
+[[package]]
+name = "num-complex"
+version = "0.4.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "73f88a1307638156682bada9d7604135552957b7818057dcef22705b4d509495"
+dependencies = [
+ "bytemuck",
+ "num-traits",
+]
+
 [[package]]
 name = "num-conv"
 version = "0.2.1"
@@ -3502,6 +3529,18 @@ dependencies = [
  "futures-io",
 ]
 
+[[package]]
+name = "pitch_shift"
+version = "2.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0768e7cebce3deed6b8249e3c636f65cdb791e235258694b6d12f71f036ce9d3"
+dependencies = [
+ "bytemuck",
+ "microfft",
+ "micromath",
+ "num-complex",
+]
+
 [[package]]
 name = "pkg-config"
 version = "0.3.33"
@@ -3783,6 +3822,7 @@ dependencies = [
  "libc",
  "lofty",
  "md5",
+ "pitch_shift",
  "psysonic-analysis",
  "psysonic-core",
  "reqwest",