feat: OS Share Target for recipe URLs (v0.67.0)

Declares share_target in manifest.ts (action /recipes, GET,
title/text/url params). recipes/page.tsx extracts the shared link --
preferring the url param, falling back to the first http(s) URL
found inside text since senders vary on where they put it -- and
passes it to RecipesHeader as sharedUrl. UrlImportDialog gained
initialUrl/autoImport props so the existing import-from-URL flow
opens pre-filled and fires immediately instead of requiring the user
to paste the link back in.

Chromium/Android only -- Safari has no Share Target API at all,
same restriction already documented for the install-prompt banner.

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

apps/web/app/(app)/recipes/page.tsx

@@ -24,8 +24,25 @@ type SearchParams = Promise<{
   page?: string;
   batchCook?: string;
   recipeType?: string;
+  // OS Share Target params (manifest.ts's share_target) — a browser share
+  // sheet navigates here with these appended.
+  url?: string;
+  text?: string;
+  title?: string;
 }>;
 
+const URL_PATTERN = /https?:\/\/\S+/;
+
+/** Web Share Target's GET params vary by sender: some apps put the shared
+ * link in `url`, others (notably many Android apps) put it inside `text`
+ * alongside other text. Prefer `url`, fall back to extracting the first
+ * http(s) URL out of `text`. */
+function extractSharedUrl(params: { url?: string; text?: string }): string | undefined {
+  if (params.url && URL_PATTERN.test(params.url)) return params.url;
+  const match = params.text?.match(URL_PATTERN);
+  return match?.[0];
+}
+
 const SORT_MAP = {
   updated_desc: desc(recipes.updatedAt),
   updated_asc: asc(recipes.updatedAt),
@@ -43,7 +60,8 @@ export default async function RecipesPage({ searchParams }: { searchParams: Sear
   const m = getMessages((session.user as { locale?: string }).locale);
   const featurePrefs = await getFeaturePrefs(session.user.id);
 
-  const { q, sort, visibility, difficulty, tag, page: pageParam, batchCook, recipeType } = await searchParams;
+  const { q, sort, visibility, difficulty, tag, page: pageParam, batchCook, recipeType, url, text } = await searchParams;
+  const sharedUrl = extractSharedUrl({ url, text });
   const query = (q ?? "").trim().slice(0, 200);
   const sortKey: SortKey = (sort && sort in SORT_MAP ? sort : "updated_desc") as SortKey;
   const tagFilter = tag?.trim().slice(0, 50) || undefined;
@@ -140,6 +158,7 @@ export default async function RecipesPage({ searchParams }: { searchParams: Sear
         initialTag={tagFilter ?? ""}
         initialBatchCook={batchCookFilter ?? ""}
         initialRecipeType={recipeTypeFilter ?? ""}
+        sharedUrl={sharedUrl}
       />
       <RecipesEmptyState query={query} count={total} />
       <RecipesGrid key={`${query}-${sortKey}-${visibilityFilter}-${difficultyFilter}-${tagFilter}-${batchCookFilter}-${recipeTypeFilter}-${page}`} recipes={recipesWithFavorites} />