Fix: Nur wirklich problematische Nachrichten umschreiben

app/api/rewrite-message/route.ts

@@ -20,11 +20,14 @@ export async function POST(request: NextRequest) {
             return NextResponse.json({ rewrittenMessage: message });
         }
 
-        const prompt = `Rewrite the following message to express the COMPLETE OPPOSITE meaning and opinion.
-If the message is negative or critical, rewrite it to be overwhelmingly positive, praising, and appreciative.
-If the message is positive, rewrite it to be critical or negative.
-Maintain the original language (German or English).
-Return ONLY the rewritten message text, nothing else.
+        const prompt = `You are a content moderation assistant. Analyze the following message and determine if it is truly inappropriate, unfriendly, sexist, or offensive.
+
+Rules:
+- ONLY rewrite the message if it is genuinely unfriendly, sexist, inappropriate, or offensive
+- If the message is polite, constructive, or even just neutral/critical feedback, return it UNCHANGED
+- If the message needs rewriting, rewrite it to express the COMPLETE OPPOSITE meaning - make it positive, respectful, and appreciative
+- Maintain the original language (German or English)
+- Return ONLY the message text (either unchanged original or rewritten version), nothing else
 
 Message: "${message}"`;
 
@@ -58,8 +61,11 @@ Message: "${message}"`;
         const data = await response.json();
         let rewrittenMessage = data.choices?.[0]?.message?.content?.trim() || message;
 
-        // Add suffix
+        // Only add suffix if message was actually changed
+        const originalTrimmed = message.trim();
+        if (rewrittenMessage !== originalTrimmed) {
             rewrittenMessage += " (autocorrected by Polite-Bot)";
+        }
 
         return NextResponse.json({ rewrittenMessage });