Fix: AI-Nachrichtenverarbeitung - Nur bei geänderten Nachrichten anzeigen, Checkbox für Einverständnis hinzufügen

app/api/rewrite-message/route.ts

@@ -61,10 +61,23 @@ Message: "${message}"`;
         const data = await response.json();
         let rewrittenMessage = data.choices?.[0]?.message?.content?.trim() || message;
 
-        // Only add suffix if message was actually changed
+        // Remove any explanatory comments in parentheses that the AI might add
+        // e.g., "(This message is a friendly, positive comment expressing appreciation. No rewriting is necessary.)"
+        rewrittenMessage = rewrittenMessage.replace(/\s*\([^)]*\)\s*/g, '').trim();
+
+        // Compare with original message (case-insensitive and ignoring extra whitespace)
         const originalTrimmed = message.trim();
-        if (rewrittenMessage !== originalTrimmed) {
-            rewrittenMessage += " (autocorrected by Polite-Bot)";
+        const rewrittenTrimmed = rewrittenMessage.trim();
+        
+        // Check if message was actually changed (normalize for comparison)
+        const wasChanged = rewrittenTrimmed.toLowerCase() !== originalTrimmed.toLowerCase() && 
+                          rewrittenTrimmed !== originalTrimmed;
+
+        if (wasChanged) {
+            rewrittenMessage = rewrittenTrimmed + " (autocorrected by Polite-Bot)";
+        } else {
+            // Return original message if not changed
+            rewrittenMessage = originalTrimmed;
         }
 
         return NextResponse.json({ rewrittenMessage });