fix: hide recipe variations button when locked instead of disabled+lock-badge (v0.78.1)

Was the one gated feature still shown as a clickable disabled button with a small lock icon overlay, opening an upgrade dialog on click. Every other gated feature (pairings, nutrition estimate, markdown export) hides entirely instead — brought this one in line and removed the now-dead locked/UpgradeDialog code from VariationsButton.

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 = "0.78.0";
+export const APP_VERSION = "0.78.1";
 
 export type ChangelogEntry = {
   version: string;
@@ -11,6 +11,13 @@ export type ChangelogEntry = {
 };
 
 export const CHANGELOG: ChangelogEntry[] = [
+  {
+    version: "0.78.1",
+    date: "2026-07-24 14:10",
+    fixed: [
+      "Recipe variations button was the one leftover spot still shown disabled with a small lock badge for tiers without the feature, instead of hidden entirely like every other gated feature. Now hidden, matching meal/drink pairings, nutrition estimation, and Markdown export.",
+    ],
+  },
   {
     version: "0.78.0",
     date: "2026-07-24 13:40",