Initial commit: Templates Reply Add-on für Hotel Park Soltau

Modifiziertes Templates Reply Thunderbird Add-on mit:
- HTML-Import von Netzlaufwerk
- Massen-Delete mit Checkboxen
- Deutsches UI mit "Vorlagen" Button
- 16 Hotel-Vorlagen als HTML-Dateien

popup.js

@@ -0,0 +1,66 @@
+// popup.js
+
+const TEMPLATE_STORAGE_KEY = 'message_templates';
+
+async function getTemplates() {
+    try {
+        const result = await browser.storage.local.get(TEMPLATE_STORAGE_KEY);
+        return result[TEMPLATE_STORAGE_KEY] || [];
+    } catch (error) {
+        console.error("Error retrieving templates in popup:", error);
+        return [];
+    }
+}
+
+function insertTemplateAndClose(templateText) {
+    browser.runtime.sendMessage({
+        action: 'insertTemplate',
+        text: templateText
+    }).catch(e => console.error("Error sending message to background:", e));
+    window.close();
+}
+
+async function renderPopupButtons() {
+    const templates = await getTemplates();
+    const templateList = document.getElementById('template-list');
+    templateList.innerHTML = '';
+
+    if (templates.length === 0) {
+        templateList.innerHTML = `
+            <div class="empty-state">
+                Keine Vorlagen vorhanden.<br>
+                <a href="#" id="open-options">Jetzt einrichten</a>
+            </div>`;
+        document.getElementById('open-options').addEventListener('click', (e) => {
+            e.preventDefault();
+            browser.runtime.openOptionsPage();
+            window.close();
+        });
+        return;
+    }
+
+    templates.forEach(template => {
+        const button = document.createElement('button');
+        button.textContent = template.name;
+        button.addEventListener('click', () => {
+            insertTemplateAndClose(template.content);
+        });
+        templateList.appendChild(button);
+    });
+
+    // Footer with manage link
+    const footer = document.createElement('div');
+    footer.className = 'footer';
+    const manageLink = document.createElement('a');
+    manageLink.href = "#";
+    manageLink.textContent = 'Vorlagen verwalten';
+    manageLink.addEventListener('click', (e) => {
+        e.preventDefault();
+        browser.runtime.openOptionsPage();
+        window.close();
+    });
+    footer.appendChild(manageLink);
+    templateList.parentNode.appendChild(footer);
+}
+
+document.addEventListener('DOMContentLoaded', renderPopupButtons);