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/app/print/meal-plan/page.tsx

@@ -2,16 +2,10 @@ import { headers } from "next/headers";
 import { auth } from "@/lib/auth/server";
 import { db, mealPlans, eq, and } from "@epicure/db";
 import { PrintTrigger } from "@/components/recipe/print-trigger";
+import { getMessages, formatMessage } from "@/lib/i18n/server";
 
 const DAYS = ["mon", "tue", "wed", "thu", "fri", "sat", "sun"] as const;
-const DAY_LABELS: Record<string, string> = {
-  mon: "Monday", tue: "Tuesday", wed: "Wednesday", thu: "Thursday",
-  fri: "Friday", sat: "Saturday", sun: "Sunday",
-};
 const MEAL_ORDER = ["breakfast", "lunch", "dinner", "snack"] as const;
-const MEAL_LABELS: Record<string, string> = {
-  breakfast: "Breakfast", lunch: "Lunch", dinner: "Dinner", snack: "Snack",
-};
 
 function getMonday(dateStr?: string): Date {
   const d = dateStr ? new Date(dateStr) : new Date();
@@ -31,6 +25,8 @@ export default async function MealPlanPrintPage({
   const session = await auth.api.getSession({ headers: await headers() });
   if (!session) return null;
 
+  const m = getMessages((session.user as { locale?: string }).locale);
+
   const monday = getMonday(week);
   const weekStart = monday.toISOString().slice(0, 10);
   const sunday = new Date(monday);
@@ -82,22 +78,22 @@ export default async function MealPlanPrintPage({
 
       <PrintTrigger />
 
-      <h1>Meal Plan</h1>
+      <h1>{m.mealPlan.title}</h1>
       <p className="subtitle">{label}</p>
 
       <table>
         <thead>
           <tr>
-            <th style={{ width: "100px" }}>Day</th>
-            {MEAL_ORDER.map((m) => (
-              <th key={m}>{MEAL_LABELS[m]}</th>
+            <th style={{ width: "100px" }}>{m.print.day}</th>
+            {MEAL_ORDER.map((meal) => (
+              <th key={meal}>{m.mealPlan.meals[meal]}</th>
             ))}
           </tr>
         </thead>
         <tbody>
           {DAYS.map((day) => (
             <tr key={day}>
-              <td style={{ fontWeight: 600, color: "#555" }}>{DAY_LABELS[day]}</td>
+              <td style={{ fontWeight: 600, color: "#555" }}>{m.print.days[day]}</td>
               {MEAL_ORDER.map((mealType) => {
                 const entry = entries.find((e) => e.day === day && e.mealType === mealType);
                 return (
@@ -106,7 +102,7 @@ export default async function MealPlanPrintPage({
                       <>
                         <span className="recipe-title">{entry.recipe?.title ?? entry.note ?? "—"}</span>
                         {entry.servings && (
-                          <span className="servings"> · {entry.servings} srv</span>
+                          <span className="servings">{formatMessage(m.print.srv, { count: entry.servings })}</span>
                         )}
                       </>
                     ) : (
@@ -120,7 +116,7 @@ export default async function MealPlanPrintPage({
         </tbody>
       </table>
 
-      <footer>Printed from Epicure</footer>
+      <footer>{m.print.footer}</footer>
     </>
   );
 }