fix: add https:// prefix to website URLs missing scheme

- Fixed 14 companies with bare domain URLs (e.g. www.example.pl -> https://www.example.pl)
- Added ensure_url filter to contact bar href (was missing in one place)
- Migration 063 fixes existing data, template filter prevents future issues

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

database/migrations/063_fix_website_urls_prefix.sql

@@ -0,0 +1,10 @@
+-- Migration 063: Fix website URLs missing https:// prefix
+-- 14 companies have website URLs without http/https scheme
+
+UPDATE companies
+SET website = 'https://' || website,
+    updated_at = NOW()
+WHERE website IS NOT NULL
+  AND website != ''
+  AND website NOT LIKE 'http://%'
+  AND website NOT LIKE 'https://%';

templates/company_detail.html

@@ -1007,7 +1007,7 @@
     </a>
         {% endfor %}
     {% elif company.website %}
-    <a href="{{ company.website }}" class="contact-bar-item" target="_blank" rel="noopener noreferrer"
+    <a href="{{ company.website|ensure_url }}" class="contact-bar-item" target="_blank" rel="noopener noreferrer"
        title="Strona internetowa firmy — {{ company.website|replace('https://', '')|replace('http://', '')|replace('www.', '') }}">
         <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
             <circle cx="12" cy="12" r="10"/>