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/components/recipe/recipes-header.tsx

@@ -87,6 +87,7 @@ export function RecipesHeader({
   initialTag = "",
   initialBatchCook = "",
   initialRecipeType = "",
+  sharedUrl,
 }: {
   count: number;
   initialQuery?: string;
@@ -96,13 +97,19 @@ export function RecipesHeader({
   initialTag?: string;
   initialBatchCook?: string;
   initialRecipeType?: string;
+  /** A link shared into the installed PWA via the OS share sheet (Web Share
+   * Target, Chromium/Android only) — see manifest.ts's share_target and
+   * page.tsx's read of the `url`/`text` params it's redirected here with.
+   * Auto-opens the import dialog pre-filled instead of requiring the user
+   * to paste the link again. */
+  sharedUrl?: string;
 }) {
   const router = useRouter();
   const pathname = usePathname();
   const t = useTranslations("recipes");
   const tRecipe = useTranslations("recipe");
   const [aiOpen, setAiOpen] = useState(false);
-  const [urlOpen, setUrlOpen] = useState(false);
+  const [urlOpen, setUrlOpen] = useState(!!sharedUrl);
   const [query, setQuery] = useState(initialQuery);
   const [, startTransition] = useTransition();
 
@@ -314,7 +321,7 @@ export function RecipesHeader({
       </div>
 
       <AiGenerateDialog open={aiOpen} onOpenChange={setAiOpen} />
-      <UrlImportDialog open={urlOpen} onOpenChange={setUrlOpen} />
+      <UrlImportDialog open={urlOpen} onOpenChange={setUrlOpen} initialUrl={sharedUrl} autoImport={!!sharedUrl} />
     </>
   );
 }