feat(telegram): add message chunking and update channel configuration

Implement message splitting for messages exceeding Telegram's 4096 character
limit. Update header branding, increase max_tokens to 4000, adjust END_HOUR
to 20, update default AI model, and revise documentation to reflect channel
setup instead of groups.

main.py

@@ -78,9 +78,12 @@ def generate_insight(topic):
                 {"role": "user", "content": prompt},
             ],
             temperature=0.7,
-            max_tokens=1500,
+            max_tokens=4000,
         )
-        return response.choices[0].message.content.strip()
+        content = response.choices[0].message.content
+        if not content:
+            return "[Erro ao gerar insight: resposta vazia da API]"
+        return content.strip()
     except Exception as e:
         return f"[Erro ao gerar insight: {e}]"
 
@@ -88,9 +91,10 @@ def generate_insight(topic):
 def send_telegram_message(text, topic):
     now = datetime.now()
     header = (
-        f"🤖 *ThorAgentIA*\n"
+        f"🤖 *Syspanel Insights - by ThorAgentIA*\n"
+        f"🤖 *https://syspanel.com.br*\n"
         f"🕒 {now.strftime('%d/%m/%Y %H:%M:%S')}\n"
-        f"🧠 Modelo: `{DEFAULT_AI_MODEL}`\n"
+        # f"🧠 Modelo: `{DEFAULT_AI_MODEL}`\n"
         f"📌 Assunto: {topic}\n\n"
     )
     message = header + text
@@ -101,10 +105,35 @@ def send_telegram_message(text, topic):
         "text": message,
         "parse_mode": "Markdown",
     }
+
     try:
-        response = requests.post(url, json=payload, timeout=30)
-        response.raise_for_status()
-        print(f"[{now.strftime('%Y-%m-%d %H:%M:%S')}] Mensagem enviada com sucesso.")
+        if len(message) <= 4096:
+            response = requests.post(url, json=payload, timeout=30)
+            response.raise_for_status()
+            print(f"[{now.strftime('%Y-%m-%d %H:%M:%S')}] Mensagem enviada com sucesso.")
+        else:
+            chunks = []
+            current = header
+            parts = text.split("\n\n")
+            for part in parts:
+                candidate = current + part
+                if len(candidate) <= 4096:
+                    current = candidate + "\n\n"
+                else:
+                    chunks.append(current.strip())
+                    current = header + part + "\n\n"
+            if current.strip():
+                chunks.append(current.strip())
+
+            for idx, chunk in enumerate(chunks, start=1):
+                chunk_payload = {
+                    "chat_id": TELEGRAM_CHAT_ID,
+                    "text": chunk,
+                    "parse_mode": "Markdown",
+                }
+                response = requests.post(url, json=chunk_payload, timeout=30)
+                response.raise_for_status()
+            print(f"[{now.strftime('%Y-%m-%d %H:%M:%S')}] Mensagem enviada em {len(chunks)} parte(s).")
     except Exception as e:
         print(f"[{now.strftime('%Y-%m-%d %H:%M:%S')}] Erro ao enviar mensagem: {e}")