i18n: translate meal/drink pairing, nutrition, comments, DMs, people search, URL import

Full sweep of hardcoded English strings across:
- Meal pairing and drink pairing dialogs (titles, descriptions, role/
  type labels, regenerate/generate buttons, progress labels) — also
  fixed drink type labels that had French text hardcoded regardless
  of locale ("Sans alcool"/"Chaud").
- Nutrition panel — had no useTranslations at all.
- Comments: header, empty/loading state, post/reply/cancel/delete
  buttons, relative timestamps (just now/Xm ago/Xh ago/Xd ago), and
  comment-reactions' toasts + aria-labels.
- Rating stars toasts.
- Direct messages: thread, conversation list, message button, both
  /messages pages.
- People search page and component.
- URL import dialog (title, description, buttons, toasts).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

apps/web/components/social/rating-stars.tsx

@@ -3,6 +3,7 @@
 import { useState } from "react";
 import { Star } from "lucide-react";
 import { toast } from "sonner";
+import { useTranslations } from "next-intl";
 import { cn } from "@/lib/utils";
 
 export function RatingStars({
@@ -16,6 +17,7 @@ export function RatingStars({
   readonly?: boolean;
   size?: "sm" | "default";
 }) {
+  const t = useTranslations("social");
   const [score, setScore] = useState(initialScore);
   const [hovered, setHovered] = useState(0);
   const [saving, setSaving] = useState(false);
@@ -31,11 +33,11 @@ export function RatingStars({
       });
       if (!res.ok) {
         const err = await res.json() as { error?: string };
-        toast.error(err.error ?? "Failed to rate");
+        toast.error(err.error ?? t("ratingFailed"));
         return;
       }
       setScore(value);
-      toast.success("Rating saved");
+      toast.success(t("ratingSaved"));
     } finally {
       setSaving(false);
     }