Offer a new share as a QR code and through the share sheet

The share created page gets "Show QR code", a dialog with the link as a
QR code (black on white, full screen on a phone) that downloads as a PNG
drawn in the browser, with a password reminder for protected shares; and
"Share…", which opens the device's share sheet where there is one. Both
carry only the link.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01V9NnLxnPp8vaaurb3Z1MFy

tests/Feature/ShareCreatedTest.php

@@ -0,0 +1,27 @@
+<?php
+
+use App\Models\Share;
+use App\Services\QrCodeService;
+
+test('the share created page offers the link as a QR code and through the share sheet', function () {
+    $share = Share::factory()->create();
+    $url = route('share.download', $share);
+
+    $response = $this->get(route('share.created', $share));
+
+    $response->assertOk()
+        ->assertSee($url, false)
+        ->assertSee('data-test="show-qr-code"', false)
+        ->assertSee('data-test="share-sheet"', false)
+        ->assertSee('share-'.$share->token.'.png')
+        ->assertSee('<div data-qr-code class="mx-auto aspect-square w-full max-w-80 rounded-corner-lg bg-white p-2 [&>svg]:size-full">'.app(QrCodeService::class)->svg($url).'</div>', false)
+        ->assertDontSee('Recipients also need the password.');
+});
+
+test('the QR code dialog reminds that a protected share also needs its password', function () {
+    $share = Share::factory()->withPassword()->create();
+
+    $this->get(route('share.created', $share))
+        ->assertOk()
+        ->assertSee('Recipients also need the password.');
+});