fix: batch of collections/i18n/translate-button fixes (v0.53.1)

- Drag-reorder used verticalListSortingStrategy on a multi-column grid,
  which computes wrong transforms for grid reflow — swapped to
  rectSortingStrategy so cards actually animate live while dragging.
- Grip handle was rendered as a sibling of (not a descendant of) the
  `group` element its `group-hover:opacity-100` depended on, so it was
  permanently invisible. Fixed the DOM nesting and made it always
  partially visible instead of hover-only.
- common.edit was missing from both locales (not just French) —
  edit-collection-dialog.tsx was the first caller to hit it.
- Root cause of "generated in my language but Translate still shows":
  generate-meal, meal-plan/generate, and adapt never set recipes.language
  on the row they inserted, so the button's `!recipe.language || ...`
  check always fell back to "show it". Fixed at all three insert sites.
- Translate dialog was entirely hardcoded English (title, description,
  language names, buttons) despite i18n keys already existing for most of
  it — now uses them, plus new translated language-name keys.
- Recipe tags now render on the recipe detail page (previously grid-card
  only).
- Collection header actions converted to icon-only + tooltip, matching
  the recipe page's pattern instead of icon+label buttons.
- Collections list search now also matches recipe titles inside each
  collection, not just the collection's own name/description.
- Explore page links to /collections/explore next to its tabs.

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

apps/web/app/api/v1/ai/adapt/[id]/route.ts

@@ -52,6 +52,8 @@ export async function POST(req: NextRequest, { params }: Params) {
   if (!configResult.ok) return configResult.response;
   const aiConfig = configResult.data;
 
+  const locale = (session!.user as { locale?: string }).locale ?? "en";
+
   const result = await withAiQuota(userId, session!.user.tier as "free" | "pro" | "family", () =>
     adaptRecipe(
       {
@@ -66,7 +68,7 @@ export async function POST(req: NextRequest, { params }: Params) {
         extraConstraints: parsed.data.extraConstraints,
       },
       { ...aiConfig, userContext: privateBio ?? undefined },
-      (session!.user as { locale?: string }).locale ?? "en"
+      locale
     ), { skipQuota: aiConfig.isByok }
   );
   if (!result.ok) return result.response;
@@ -100,6 +102,7 @@ export async function POST(req: NextRequest, { params }: Params) {
         description: adapted.description,
         baseServings: adapted.baseServings,
         visibility: "private",
+        language: locale,
         difficulty: adapted.difficulty,
         prepMins: adapted.prepMins,
         cookMins: adapted.cookMins,

apps/web/app/api/v1/ai/generate-meal/route.ts

@@ -8,6 +8,7 @@ import { withAiQuota, resolveAiConfigOrError } from "@/lib/ai/ai-error";
 import { checkAndIncrementTierLimit, incrementUsage, TierLimitError } from "@/lib/tiers";
 import { generateMeal, MEAL_COURSES } from "@/lib/ai/features/generate-meal";
 import { getUserPrivateBio } from "@/lib/ai/user-bio";
+import { getMessages } from "@/lib/i18n/server";
 
 const Schema = z.object({
   collectionId: z.string().min(1),
@@ -89,12 +90,13 @@ export async function POST(req: NextRequest) {
         baseServings: recipe.baseServings,
         recipeType: recipe.recipeType,
         visibility: "private",
+        language: locale,
         aiGenerated: true,
         difficulty: recipe.difficulty ?? null,
         prepMins: recipe.prepMins ?? null,
         cookMins: recipe.cookMins ?? null,
         dietaryTags: recipe.dietaryTags ?? {},
-        tags: [recipe.course],
+        tags: [getMessages(locale).collections.course[recipe.course]],
       });
 
       if (recipe.ingredients.length > 0) {

apps/web/app/api/v1/ai/meal-plan/generate/route.ts

@@ -134,6 +134,7 @@ export async function POST(req: NextRequest) {
         description: entry.recipe.description,
         baseServings: entry.servings,
         visibility: "private",
+        language: locale,
         aiGenerated: true,
         difficulty: entry.recipe.difficulty ?? null,
         prepMins: entry.recipe.prepMins ?? null,