fix: Fehlendes src-type-display Element im Quellen-Formular ergänzt

Das readonly Input zeigt dem Nutzer den erkannten Quellentyp (RSS-Feed,
Web-Quelle, Telegram) nach der Auto-Erkennung an. Der hidden Select
dient weiterhin als Datenspeicher für saveSource().
Telegram-Pfad setzt jetzt ebenfalls src-type-display.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/static/dashboard.html

@@ -603,8 +603,9 @@
                                 </select>
                             </div>
                             <div class="form-group">
-                                <label for="src-type-select">Typ</label>
+                                <label>Typ</label>
-                                <select id="src-type-select">
+                                <input type="text" id="src-type-display" class="input-readonly" readonly>
+                                <select id="src-type-select" style="display:none">
                                     <option value="rss_feed">RSS-Feed</option>
                                     <option value="web_source">Web-Quelle</option>
                                     <option value="telegram_channel">Telegram-Kanal</option>

src/static/js/app.js

@@ -2682,6 +2682,7 @@ const App = {
             };
             document.getElementById('src-name').value = '@' + channelName;
             document.getElementById('src-type-select').value = 'telegram_channel';
+            document.getElementById('src-type-display').value = 'Telegram';
             document.getElementById('src-domain').value = tgUrl;
             document.getElementById('src-rss-url-group').style.display = 'none';
             document.getElementById('src-discovery-result').style.display = 'block';
@@ -2731,6 +2732,7 @@ const App = {
                 const typeLabel = this._discoveredData.source_type === 'rss_feed' ? 'RSS-Feed' : this._discoveredData.source_type === 'telegram_channel' ? 'Telegram' : 'Web-Quelle';
                 const typeSelect = document.getElementById('src-type-select');
                 if (typeSelect) typeSelect.value = this._discoveredData.source_type || 'web_source';
+                document.getElementById('src-type-display').value = typeLabel;
 
                 const rssGroup = document.getElementById('src-rss-url-group');
                 const rssInput = document.getElementById('src-rss-url');
@@ -2810,6 +2812,7 @@ const App = {
         const typeLabel = source.source_type === 'rss_feed' ? 'RSS-Feed' : source.source_type === 'telegram_channel' ? 'Telegram' : 'Web-Quelle';
         const typeSelect = document.getElementById('src-type-select');
         if (typeSelect) typeSelect.value = source.source_type || 'web_source';
+        document.getElementById('src-type-display').value = typeLabel;
 
         const rssGroup = document.getElementById('src-rss-url-group');
         const rssInput = document.getElementById('src-rss-url');