File-Upload: Attachments-Tabelle, Base64-Speicherung, Frontend mit Drag&Drop/Paste/Preview, Error-Handling Fix

wwwroot/js/pages/chat-page.js

@@ -43,6 +43,42 @@ registerPage('chat', {
       });
     }
 
+    // File Upload
+    const fileBtn = document.getElementById('fileBtn');
+    const fileInput = document.getElementById('fileInput');
+    if (fileBtn && fileInput) {
+      fileBtn.addEventListener('click', () => fileInput.click());
+      fileInput.addEventListener('change', (e) => {
+        if (e.target.files[0]) handleFileSelect(e.target.files[0]);
+      });
+    }
+
+    // Drag & Drop
+    const chatContainer = document.querySelector('.chat-page');
+    if (chatContainer) {
+      chatContainer.addEventListener('dragover', (e) => { e.preventDefault(); e.stopPropagation(); });
+      chatContainer.addEventListener('drop', (e) => {
+        e.preventDefault();
+        e.stopPropagation();
+        if (e.dataTransfer.files[0]) handleFileSelect(e.dataTransfer.files[0]);
+      });
+    }
+
+    // Paste
+    if (inputEl) {
+      inputEl.addEventListener('paste', (e) => {
+        const items = e.clipboardData?.items;
+        if (!items) return;
+        for (const item of items) {
+          if (item.kind === 'file') {
+            e.preventDefault();
+            handleFileSelect(item.getAsFile());
+            return;
+          }
+        }
+      });
+    }
+
     // Archivieren
     const archiveBtn = document.getElementById('archiveBtn');
     if (archiveBtn) archiveBtn.addEventListener('click', clearChat);
@@ -62,5 +98,6 @@ registerPage('chat', {
     lastKnownMessageId = 0;
     loadedArchiveCount = 0;
     isStreaming = false;
+    clearPendingFile();
   }
 });