v0.6.1: follow linked recipes on sobors.hu, white favicon

- Sobors.hu parser: detect external links in instructions and follow them
  to scrape real recipe content (e.g. kiskegyed.hu linked recipes)
- Article-style ingredient fallback for sobors.hu pages without structured
  ingredient containers (h4 + ul > li plain text)
- Favicon changed to logo_notext_white.svg

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/templates/base.html

@@ -7,7 +7,7 @@
     <link rel="preconnect" href="https://fonts.googleapis.com">
     <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
     <link href="https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700&display=swap" rel="stylesheet">
-    <link rel="icon" type="image/svg+xml" href="/assets/logo_notext.svg">
+    <link rel="icon" type="image/svg+xml" href="/assets/logo_notext_white.svg">
     <style>
         :root {
             --bg: #0d1117;