fix: standardize locked-vs-hidden treatment across all 9 per-tier gated features (v0.79.0)

Rule, applied consistently everywhere via a new isFeatureAvailableAnyTier() helper: if a feature is enabled on at least one tier, it stays visible for locked-out viewers with a small "Pro" badge and opens an upgrade prompt on click; if a feature is disabled on every tier, it hides entirely, since there's no upgrade path to point at.

Covers: recipe variations, meal/drink pairings, nutrition estimation, Markdown export (5 call sites), weekly nutrition, import from URL, import from photo, and the Instacart grocery-delivery menu item. Previously inconsistent — some hid outright, one showed a lock icon overlapping its own icon.

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 = "0.78.3";
+export const APP_VERSION = "0.79.0";
 
 export type ChangelogEntry = {
   version: string;
@@ -11,6 +11,13 @@ export type ChangelogEntry = {
 };
 
 export const CHANGELOG: ChangelogEntry[] = [
+  {
+    version: "0.79.0",
+    date: "2026-07-24 16:00",
+    fixed: [
+      "Standardized locked-feature treatment across every per-tier gated feature: if a feature is enabled on at least one tier, it stays visible with a \"Pro\" badge (clicking opens an upgrade prompt) instead of hiding; only a feature disabled on every tier hides outright. Applies to recipe variations, meal/drink pairings, nutrition estimation, Markdown export (recipe, meal plan, shopping list, collection, pantry), weekly nutrition, import from URL, import from photo, and the Instacart grocery-delivery option.",
+    ],
+  },
   {
     version: "0.78.3",
     date: "2026-07-24 15:00",