feat(hub): Configuration page, asset seedOrUpdate, English UI

- Add Configuration page with "Refresh Assets" button
- Replace seedIfEmpty with seedOrUpdate (SHA-256 compare on startup)
- Translate all Hungarian text on Apps pages to English
- Add Configuration tab to all template navigation
- Expand isAssetFile to match favicon patterns
- Add felhom-logo.svg to website assets for the pipeline

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

hub/internal/web/templates/customer_unified.html

@@ -15,7 +15,8 @@
             <nav class="nav-links" style="margin-bottom: 0.5rem;">
                 <a href="/" class="nav-link">Dashboard</a>
                 <a href="/configs" class="nav-link active">Customers</a>
-                <a href="/apps" class="nav-link">Alkalmazások</a>
+                <a href="/apps" class="nav-link">Apps</a>
+                <a href="/configuration" class="nav-link">Configuration</a>
             </nav>
             <a href="/configs" class="back-link">&larr; All Customers</a>
             <h1>
@@ -471,20 +472,20 @@
             {{end}}
         </section>
 
-        <!-- Alkalmazás telemetria -->
+        <!-- App telemetry -->
         {{if .HasAppTelemetry}}
         <section class="card">
-            <h2>Alkalmazás telemetria <span class="text-muted" style="font-size: 0.85em; font-weight: normal;">(utolsó 7 nap)</span></h2>
+            <h2>App Telemetry <span class="text-muted" style="font-size: 0.85em; font-weight: normal;">(last 7 days)</span></h2>
             <table class="data-table">
                 <thead>
                     <tr>
-                        <th>Alkalmazás</th>
-                        <th>Memória (jelenlegi)</th>
-                        <th>Memória (átlag 7d)</th>
-                        <th>Memória (csúcs 7d)</th>
-                        <th>Katalógus limit</th>
-                        <th>Hibák</th>
-                        <th>Figyelmeztetések</th>
+                        <th>App</th>
+                        <th>Memory (current)</th>
+                        <th>Memory (avg 7d)</th>
+                        <th>Memory (peak 7d)</th>
+                        <th>Catalog Limit</th>
+                        <th>Errors</th>
+                        <th>Warnings</th>
                     </tr>
                 </thead>
                 <tbody>