mini player + dark glass: eight shapes run by the hidden main as the one brain, dissolving covers and accents, drag from anywhere, and the space between the panes turned to real acrylic - with the webview flags that keep rest frames honest

src/views/Settings.svelte

@@ -1,6 +1,7 @@
 <script>
     import { app, clearCatalogHeroArtCache, refreshSourcePrefs } from "../lib/state.svelte.js";
     import { setWordFill } from "../lib/lyrics.svelte.js";
+    import { applyGlass } from "../lib/glass.js";
     import * as api from "../lib/api.js";
     import Icon from "../components/Icon.svelte";
 
@@ -105,6 +106,14 @@
         }
     }
 
+    async function setGlassMode(next) {
+        if (next !== settings.glass_mode) {
+            // Applies live — the acrylic backdrop and the CSS thinning land
+            // together the moment the save succeeds.
+            if (await commit({ glassMode: next })) applyGlass(next);
+        }
+    }
+
     async function setWordTiming(next) {
         if (next !== settings.word_timing) {
             await commit({ wordTiming: next });
@@ -280,6 +289,25 @@
             </p>
         </section>
 
+        <section>
+            <h2>Appearance</h2>
+            <div class="row">
+                <div class="label">
+                    <div class="name">Dark glass</div>
+                    <div class="hint">Lets whatever is behind the window glow through the app's dark surfaces with a live blur (Windows acrylic). Panels, menus and cards stay solid so nothing gets hard to read.</div>
+                </div>
+                <select
+                    class="device-select"
+                    value={settings.glass_mode ? "on" : "off"}
+                    disabled={saving}
+                    onchange={(e) => setGlassMode(e.currentTarget.value === "on")}
+                >
+                    <option value="off">Off — solid</option>
+                    <option value="on">On — dark glass</option>
+                </select>
+            </div>
+        </section>
+
         <section>
             <h2>Playback</h2>
             <div class="row">