fix(glass): solidify the translucent (backdrop-on) glass tier

With a background image on, glass surfaces used surface-alpha 50% + 10px blur, so the feed read
straight THROUGH the nav/menus/popovers (user-reported: distractingly transparent). Raised to
72%/80%/85% + 14px blur — the backdrop image still shows as soft colour, but content behind no longer
punches through. Verified in-browser: nav bg alpha 0.5 -> 0.72, no inline override on a clean pref.

VERSION

@@ -1 +1 @@
-0.60.0
+0.60.1

frontend/src/index.css

@@ -99,12 +99,15 @@
    glass (image off / perf), the :root defaults keep it solid & readable. ===== */
 html[data-backdrop="on"],
 .glass-media {
-  --glass-blur: 10px;
+  /* Solidified after user feedback (2026-08-08): 50%/10px let the feed read straight THROUGH the nav
+     and popovers — distractingly transparent. Higher alpha + a stronger blur keep the backdrop image
+     showing through as soft colour without the content behind punching through. */
+  --glass-blur: 14px;
   --glass-saturate: 1.6;
   --glass-dark-bright: 1.2;
-  --glass-surface-alpha: 50%;
-  --glass-card-alpha: 60%;
-  --glass-menu-alpha: 66%;
+  --glass-surface-alpha: 72%;
+  --glass-card-alpha: 80%;
+  --glass-menu-alpha: 85%;
   --glass-border-alpha: 80%;
   --glass-edge: 25%;
   --glass-inset: 15%;

frontend/src/lib/releaseNotes.ts

@@ -14,6 +14,13 @@ export interface ReleaseEntry {
 }
 
 export const RELEASE_NOTES: ReleaseEntry[] = [
+  {
+    version: "0.60.1",
+    date: "2026-08-08",
+    fixes: [
+      "With a background image on, the frosted panels (nav, menus, dialogs) are less see-through — the content behind them no longer reads through and distracts.",
+    ],
+  },
   {
     version: "0.60.0",
     date: "2026-08-08",