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/app/(app)/meal-plan/page.tsx

@@ -12,7 +12,7 @@ import { NewShoppingListButton } from "@/components/meal-plan/new-shopping-list-
 import { WeeklyNutritionBar } from "@/components/nutrition/weekly-nutrition-bar";
 import { cn } from "@/lib/utils";
 import { ExportMarkdownButton } from "@/components/shared/export-markdown-button";
-import { getFeatureFlagMatrix, type Tier } from "@/lib/feature-flags";
+import { getFeatureFlagMatrix, isFeatureAvailableAnyTier, type Tier } from "@/lib/feature-flags";
 import { mealPlanToMarkdown } from "@/lib/markdown/meal-plan";
 import { getMessages, formatMessage } from "@/lib/i18n/server";
 
@@ -62,8 +62,10 @@ export default async function MealPlanPage({
   const msgs = getMessages((session.user as { locale?: string }).locale);
   const viewerTier = (session.user as { tier?: string }).tier as Tier | undefined ?? "free";
   const featureFlags = await getFeatureFlagMatrix();
-  const canExportMarkdown = featureFlags.markdown_export[viewerTier];
-  const canSeeWeeklyNutrition = featureFlags.weekly_nutrition[viewerTier];
+  const markdownExportLocked = !featureFlags.markdown_export[viewerTier];
+  const markdownExportAvailable = isFeatureAvailableAnyTier(featureFlags, "markdown_export");
+  const weeklyNutritionLocked = !featureFlags.weekly_nutrition[viewerTier];
+  const weeklyNutritionAvailable = isFeatureAvailableAnyTier(featureFlags, "weekly_nutrition");
 
   const monday = getMonday(week);
   const weekStart = toDateStr(monday);
@@ -162,10 +164,11 @@ export default async function MealPlanPage({
             } />
             <TooltipContent>{msgs.common.print}</TooltipContent>
           </Tooltip>
-          {canExportMarkdown && (
+          {markdownExportAvailable && (
             <ExportMarkdownButton
               markdown={mealPlanToMarkdown({ label, entries })}
               filename={`meal-plan-${weekStart}`}
+              locked={markdownExportLocked}
             />
           )}
           <Tooltip>
@@ -180,7 +183,7 @@ export default async function MealPlanPage({
       </div>
       </TooltipProvider>
 
-      {canSeeWeeklyNutrition && <WeeklyNutritionBar weekStart={weekStart} />}
+      {weeklyNutritionAvailable && <WeeklyNutritionBar weekStart={weekStart} locked={weeklyNutritionLocked} />}
       <MealPlanner weekStart={weekStart} initialEntries={entries} userRecipes={userRecipes} hasNutritionGoals={hasNutritionGoals} />
 
       {sharedMemberships.length > 0 && (