Linux: session-native GDK/WebKit mitigations and in-page browse scroll (#731)

* feat(linux): session GDK defaults, nvidia-quirk, optional x11-legacy wrap

Ship PSYSONIC_ALLOW_NATIVE_GDK from Nix/AUR instead of pinning WEBKIT_DISABLE_*
and GDK x11. Add flake psysonic-x11-legacy for the old wrap; alias gdk-session
to psysonic. Startup uses webkit2gtk-nvidia-quirk and Wayland-aware compositing;
refresh Help (a45) and nixos-install docs.

* fix(linux): session GDK and nvidia-quirk only; drop wrapper env heuristics

Remove PSYSONIC_ALLOW_NATIVE_GDK and devShell GDK/WEBKIT exports; stop
synthesizing GDK/WebKit vars in main.rs. Update Nix/AUR wrappers, install
docs, CHANGELOG, and help FAQ with practical user-facing workarounds.

* fix(linux): X11-pinned GDK uses DMABUF quirk path, not Wayland explicit-sync

When GDK_BACKEND is forced to x11 on a wayland user session, webkit2gtk-nvidia-quirk
would still apply __NV_DISABLE_EXPLICIT_SYNC and gray out the webview. Map that case
to WEBKIT_DISABLE_DMABUF_RENDERER like native X11.

* fix(ui): stabilize WebKitGTK/Wayland hover paint for nav and media cards

Sidebar nav links avoid transition:all and promote icons with translateZ(0).
Artist rows and album/artist/song cards use compositing hints; card shadows
and borders no longer interpolate so cover zoom can stay smooth without jitter.

* fix(ui): isolate artist/album card text and cover paint on WebKitGTK

Promote cover blocks with contain/paint and text stacks with translateZ(0);
use artist-card-info on the artists grid for the same layout as other cards.

* feat(artists): in-page overlay scroll and locked main viewport

Move list/grid into an inner OverlayScrollArea, stop sticky toolbar from
owning the route scroll, align the rail with the main panel edge, and skip
the main-route overlay thumb when the viewport cannot scroll vertically.

* feat(browse): extend in-page overlay scroll to more library routes

Reuse the locked main viewport pattern from Artists for Albums, Composers,
Lossless albums, and New releases; wire VirtualCardGrid and scroll chrome
to the matching in-page viewport ids.

* fix(linux): improve Wayland GPU compositing text clarity in WebKitGTK

Use on-demand hardware acceleration on main and mini webviews when the
session is Wayland and compositing stays on; gate subpixel body AA on the
same conditions via new Tauri probes. Document PSYSONIC_SKIP_WAYLAND_FONT_TUNING
for opt-out and changelog.

* fix(rust): satisfy clippy needless_return in Linux webkit helpers

* fix(linux): tune Wayland text rendering with HW policy env and CSS

Allow PSYSONIC_WEBKIT_WAYLAND_HW_POLICY to select WebKit hardware
acceleration policy (never/always vs default on-demand). Extend Wayland
font CSS to #root with geometricPrecision and text-size-adjust on html.

* feat(linux): Wayland text presets in settings, safe WebKit apply, CPU default

Persist profile to app config; apply WebKit policy at startup/mini only to
avoid WebKitGTK hangs on live toggles. UI + CSS preview stays live; default
preset is sharp (CPU-friendly).

* fix(linux): map Wayland sharp preset to OnDemand WebKit policy

HardwareAccelerationPolicy::Never at startup broke main-viewport wheel
scrolling on WebKitGTK+Wayland; sharp vs balanced remains a CSS AA path.
Use PSYSONIC_WEBKIT_WAYLAND_HW_POLICY for a true Never policy.

* fix(rust): gate Linux-only Wayland WebKit helpers for Windows builds

Re-export startup helpers only under cfg(linux) and drop non-Linux stubs so
Windows compiles without unused-import and dead-code warnings.

* chore(release): CHANGELOG + credits for Linux session/WebKit work (PR #731)

Consolidate scattered incremental changelog notes into two [1.47.0]
entries with PR link; remove duplicate Linux blocks from [1.46.0] Fixed.
Append settings credit line for cucadmuh.

src/styles/components/album-card.css

@@ -6,7 +6,8 @@
   border-radius: var(--radius-lg);
   overflow: hidden;
   box-shadow: inset 0 0 0 1px var(--border-subtle);
-  transition: transform var(--transition-base), box-shadow var(--transition-base);
+  /* Instant shadow change — same WebKitGTK jitter as animated box-shadow on .artist-card. */
+  transform: translateZ(0);
 }
 
 .album-card:hover {
@@ -18,6 +19,9 @@
   aspect-ratio: 1;
   overflow: hidden;
   background: var(--bg-hover);
+  contain: paint;
+  isolation: isolate;
+  transform: translateZ(0);
 }
 
 .album-card-cover img {
@@ -25,12 +29,12 @@
   height: 100%;
   object-fit: cover;
   transform-origin: center center;
-  transform: scale(1);
+  transform: translateZ(0) scale(1);
   transition: opacity 0.15s ease, transform 350ms cubic-bezier(0.16, 1, 0.3, 1);
 }
 
 .album-card:hover .album-card-cover img {
-  transform: scale(1.02);
+  transform: translateZ(0) scale(1.02);
 }
 
 .album-card-cover-placeholder {
@@ -42,3 +46,6 @@
   color: var(--text-muted);
 }
 
+.album-card-info {
+  transform: translateZ(0);
+}

src/styles/components/artist-card-grid-view.css

@@ -7,7 +7,8 @@
   border: 1px solid var(--border-subtle);
   cursor: pointer;
   overflow: hidden;
-  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
+  /* Instant border/shadow: animated box-shadow jitters on WebKitGTK/Wayland; cover zoom stays smooth below. */
+  transform: translateZ(0);
 }
 
 .artist-card:hover {
@@ -24,6 +25,9 @@
   align-items: center;
   justify-content: center;
   color: var(--text-muted);
+  contain: paint;
+  isolation: isolate;
+  transform: translateZ(0);
 }
 
 .artist-card-avatar img {
@@ -31,12 +35,12 @@
   height: 100%;
   object-fit: cover;
   transform-origin: center center;
-  transform: scale(1);
+  transform: translateZ(0) scale(1);
   transition: opacity 0.15s ease, transform 350ms cubic-bezier(0.16, 1, 0.3, 1);
 }
 
 .artist-card:hover .artist-card-avatar img {
-  transform: scale(1.02);
+  transform: translateZ(0) scale(1.02);
 }
 
 .artist-card-avatar-initial {
@@ -64,6 +68,11 @@
   display: flex;
   flex-direction: column;
   gap: 2px;
+  transform: translateZ(0);
+}
+
+.artist-card-info--center {
+  text-align: center;
 }
 
 .artist-card-name {

src/styles/components/artists-page.css

@@ -1,4 +1,5 @@
 /* ─ Artists Page ─ */
+
 .letter-heading {
   font-size: 13px;
   font-weight: 700;
@@ -23,6 +24,7 @@
   padding: var(--space-3);
   border-radius: var(--radius-md);
   transition: background var(--transition-fast);
+  transform: translateZ(0);
   width: 100%;
   text-align: left;
 }
@@ -67,4 +69,3 @@
   color: var(--text-muted);
   margin-top: 2px;
 }
-