Clarify follow‑up question prompt

Update `ChatManager::followUpQuestions` to explicitly request up to five
follow‑up questions from the user’s perspective.
- Replace the generic “Generate up to five questions” with “Generate up
to five follow up questions”.
- Add the clause “The questions are from the user point of view.”
- Remove the redundant “Please” and streamline the wording.
- Keep the JSON array return format and the “no markdown” restriction.

These changes make the prompt clearer and better aligned with the
intended user‑centric interaction.

Author: cristianadam

llamachatmanager.cpp

@@ -314,9 +314,10 @@ void ChatManager::followUpQuestions(const QString &convId,
     QJsonArray parts;
     QJsonObject txt;
     txt["type"] = "text";
-    txt["text"] = "Generate up to five questions in the context of the "
-                  "current conversation. Only questions, no explanations. "
-                  "Please return the questions in the form of a JSON array as plain text strings, "
+    txt["text"] = "Generate up to five follow up questions in the context of the "
+                  "current conversation. The questions are from the user point of view. "
+                  "Only questions, no explanations. "
+                  "Return the questions in the form of a JSON array as plain text strings, "
                   "no markdown.";
     parts.append(txt);
     QJsonObject prompt;