fix: recipe cover placeholder icons use solid color, not opacity (v0.51.2)

text-foreground/25 alpha compounded wherever an icon's own stroke paths
overlap (chef-hat's brim/band, croissant's curves), reading as a dark
blotch instead of an even tint. Swapped to text-muted-foreground — solid,
themed, no overlap artifacts.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

apps/web/lib/changelog.ts

@@ -1,5 +1,5 @@
 // Mirrors CHANGELOG.md at the repo root — update both together.
-export const APP_VERSION = "0.51.1";
+export const APP_VERSION = "0.51.2";
 
 export type ChangelogEntry = {
   version: string;
@@ -11,6 +11,13 @@ export type ChangelogEntry = {
 };
 
 export const CHANGELOG: ChangelogEntry[] = [
+  {
+    version: "0.51.2",
+    date: "2026-07-19 12:20",
+    fixed: [
+      "Recipe cover placeholder icons now use a solid color instead of a transparent one — the transparency darkened wherever an icon's own strokes overlapped, showing up as an uneven blotch on icons like the chef's hat or croissant.",
+    ],
+  },
   {
     version: "0.51.1",
     date: "2026-07-19 12:05",