feat(i18n): translate hardcoded strings across print, public recipe, and recipe management UI

Wires dozens of components and server pages to next-intl instead of hardcoded
English text, and adds a lightweight getMessages/formatMessage helper for
server components (print pages, public recipe page, cook metadata) since
next-intl/server isn't wired into this app's routing. Backfills missing
en/fr message keys that existing code already referenced but fr.json lacked.

apps/web/components/recipe/meal-pairing-button.tsx

@@ -1,6 +1,7 @@
 "use client";
 
 import { useState } from "react";
+import { useTranslations } from "next-intl";
 import { useRouter } from "next/navigation";
 import { FakeProgressBar } from "@/components/ui/fake-progress-bar";
 import { UtensilsCrossed, Sparkles, Loader2, ChefHat, Salad, Wine, Cake, Sandwich, Soup, Check } from "lucide-react";
@@ -54,6 +55,7 @@ const DIFFICULTY_VARIANT = {
 } as const;
 
 export function MealPairingButton({ recipeId }: { recipeId: string }) {
+  const t = useTranslations("recipe");
   const router = useRouter();
   const [open, setOpen] = useState(false);
   const [loading, setLoading] = useState(false);
@@ -71,7 +73,7 @@ export function MealPairingButton({ recipeId }: { recipeId: string }) {
         headers: { "Content-Type": "application/json" },
         body: JSON.stringify({ count: 4 }),
       });
-      if (!res.ok) { toast.error("Failed to suggest pairings"); return; }
+      if (!res.ok) { toast.error(t("pairingMealFailed")); return; }
       const data = await res.json() as { pairings: Pairing[] };
       setPairings(data.pairings);
     } finally {
@@ -101,7 +103,7 @@ export function MealPairingButton({ recipeId }: { recipeId: string }) {
           headers: { "Content-Type": "application/json" },
           body: JSON.stringify({ prompt: pairing.name }),
         });
-        if (!genRes.ok) { toast.error(`Failed to generate "${pairing.name}"`); continue; }
+        if (!genRes.ok) { toast.error(t("pairingGenerateFailed", { name: pairing.name })); continue; }
         const generated = await genRes.json() as {
           title: string; description?: string; baseServings?: number; prepMins?: number;
           cookMins?: number; difficulty?: string; dietaryTags?: Record<string, boolean>;
@@ -113,11 +115,11 @@ export function MealPairingButton({ recipeId }: { recipeId: string }) {
           headers: { "Content-Type": "application/json" },
           body: JSON.stringify({ ...generated, visibility: "private", aiGenerated: true }),
         });
-        if (!saveRes.ok) { toast.error(`Failed to save "${pairing.name}"`); continue; }
+        if (!saveRes.ok) { toast.error(t("pairingSaveFailed", { name: pairing.name })); continue; }
         const saved = await saveRes.json() as { id: string };
         savedIds.push(saved.id);
       } catch {
-        toast.error(`Error generating "${pairing.name}"`);
+        toast.error(t("pairingGenerateFailed", { name: pairing.name }));
       }
     }
 
@@ -126,10 +128,10 @@ export function MealPairingButton({ recipeId }: { recipeId: string }) {
     setOpen(false);
 
     if (savedIds.length === 1) {
-      toast.success("Recipe generated — review before publishing");
+      toast.success(t("pairingSuccess"));
       router.push(`/recipes/${savedIds[0]}/edit`);
     } else if (savedIds.length > 1) {
-      toast.success(`${savedIds.length} recipes generated — find them in your library`);
+      toast.success(t("pairingBulkSuccess", { count: savedIds.length }));
       router.push("/recipes");
     }
   }