dark glass, the whole app: frost on every pane, and the periscope pattern for every glass bar the frost sits under - backdrop-filter black-flattens over see-through ground (measured 3-vs-40), so bars over frost blur a scroll-synced clone behind a static band cut instead; the bar moved out of the scroller (pane shell, inner .content keeping the closest-contract, the old negative-margin flow replayed by a spacer after the artist page's sticky physics named the scrollport padding sacred); painted pages declare data-painted and keep the real backdrop bar, which is how the artist hero runs under the glass again; np wash rides the scroll away and dissolves to frost like the album banner; perf measured to vsync - 142px blur wraps (27.9ms frames down to 6.9), idle scroll-gated reclones, clip-path band, content-visibility on library rows, async cover decode; mini frosts over the mini:glass channel and the rest-frame flags ride window config because the env-var lane dies on some webview2 runtimes

src/lib/glass.js

@@ -2,9 +2,21 @@
 // root (global.css thins the base surfaces), the OS half is the acrylic
 // backdrop behind the transparent window (window_glass command). Both are
 // idempotent, so boot and the Settings toggle share this one entry point.
+//
+// This file runs in the MAIN window only. The mini frosts itself from the
+// `mini:glass` event this emits (one setting, two windows): it toggles its
+// own root class and invokes window_glass, which acts on the CALLING window.
+// The mini must never import this — its applier would re-emit into its own
+// listener.
+import { emit } from "@tauri-apps/api/event";
 import { windowGlass } from "./api.js";
 
+let current = false;
+export const glassOn = () => current;
+
 export function applyGlass(on) {
-    document.documentElement.classList.toggle("glass", !!on);
-    void windowGlass(!!on).catch(() => {});
+    current = !!on;
+    document.documentElement.classList.toggle("glass", current);
+    void windowGlass(current).catch(() => {});
+    void emit("mini:glass", { on: current });
 }

src/lib/miniBridge.svelte.js

@@ -11,11 +11,14 @@
 //                                                   throttled ~5/s
 //   mini:queue  { rows: [{ title, dur }], index, next: { title, artUrl } }
 //                                                   on queue shape change
+//   mini:glass  { on }                              on dark-glass flips
+//                                                   (applyGlass) + hello
 //   mini:cmd    { op, value }                       mini → here
 //   mini:hello  {}                                  mini → here, answered
 //                                                   with a full snapshot
 import { emit } from "@tauri-apps/api/event";
 import * as api from "./api.js";
+import { glassOn } from "./glass.js";
 import {
     player,
     theme,
@@ -154,6 +157,9 @@ export function initMiniBridge() {
         void emitTrack();
         void emitQueue();
         emitTick();
+        // Frost state rides its own channel: hello answers with the current
+        // value, applyGlass pushes flips live (see glass.js).
+        void emit("mini:glass", { on: glassOn() });
     });
     api.onEvent("mini:cmd", (p) => {
         const { op, value } = p ?? {};