refactor(config): simplify AI provider configuration with provider selector

Remove StepFun provider support and consolidate AI configuration under
DEFAULT_AI_PROVIDER variable supporting openrouter, llamacpp, and openai.
Update .env, README.md, and main.py to use the new provider-based structure.
Add "Qualidade Total na Empresa" to topics list.

main.py

@@ -11,16 +11,12 @@ load_dotenv()
 
 TELEGRAM_BOT_TOKEN = os.getenv("TELEGRAM_BOT_TOKEN")
 TELEGRAM_CHAT_ID = os.getenv("TELEGRAM_CHAT_ID")
-OPENAI_API_KEY = os.getenv("OPENAI_API_KEY")
+DEFAULT_AI_PROVIDER = os.getenv("DEFAULT_AI_PROVIDER", "openrouter").lower()
+DEFAULT_AI_MODEL = os.getenv("DEFAULT_AI_MODEL", "")
 OPENROUTER_API_KEY = os.getenv("OPENROUTER_API_KEY")
-OPENROUTER_MODEL = os.getenv("OPENROUTER_MODEL")
-STEPFUN_BASE_URL = os.getenv("STEPFUN_BASE_URL")
-STEPFUN_API_KEY = os.getenv("STEPFUN_API_KEY")
-STEPFUN_MODEL = os.getenv("STEPFUN_MODEL")
-LLAMACPP_BASE_URL = os.getenv("LLAMACPP_BASE_URL")
-LLAMACPP_API_KEY = os.getenv("LLAMACPP_API_KEY")
-LLAMACPP_MODEL = os.getenv("LLAMACPP_MODEL")
-DEFAULT_AI_MODEL = os.getenv("DEFAULT_AI_MODEL", OPENROUTER_MODEL or STEPFUN_MODEL or LLAMACPP_MODEL or "gpt-4o-mini")
+LLAMACPP_BASE_URL = os.getenv("LLAMACPP_BASE_URL", "http://localhost:8080/v1/")
+LLAMACPP_API_KEY = os.getenv("LLAMACPP_API_KEY", "not-needed")
+OPENAI_API_KEY = os.getenv("OPENAI_API_KEY")
 LANGUAGE = os.getenv("LANGUAGE", "pt-BR")
 MIN_LINES = int(os.getenv("MIN_LINES", "20"))
 INTERVAL_MINUTES = int(os.getenv("INTERVAL_MINUTES", "60"))
@@ -34,10 +30,14 @@ if not TELEGRAM_BOT_TOKEN or TELEGRAM_BOT_TOKEN == "seu_bot_token_aqui":
 if not TELEGRAM_CHAT_ID or TELEGRAM_CHAT_ID == "seu_chat_id_aqui":
     raise ValueError("TELEGRAM_CHAT_ID não configurado no .env")
 
-if OPENROUTER_API_KEY and OPENROUTER_API_KEY != "sk-or-v1-...":
+if DEFAULT_AI_PROVIDER == "openrouter" and OPENROUTER_API_KEY and OPENROUTER_API_KEY != "sk-or-v1-...":
+    client = openai.OpenAI(base_url="https://openrouter.ai/api/v1", api_key=OPENROUTER_API_KEY)
+elif DEFAULT_AI_PROVIDER == "llamacpp" and LLAMACPP_API_KEY:
+    client = openai.OpenAI(base_url=LLAMACPP_BASE_URL, api_key=LLAMACPP_API_KEY)
+elif DEFAULT_AI_PROVIDER == "openai" and OPENAI_API_KEY:
+    client = openai.OpenAI(api_key=OPENAI_API_KEY)
+elif OPENROUTER_API_KEY and OPENROUTER_API_KEY != "sk-or-v1-...":
     client = openai.OpenAI(base_url="https://openrouter.ai/api/v1", api_key=OPENROUTER_API_KEY)
-elif STEPFUN_API_KEY:
-    client = openai.OpenAI(base_url=STEPFUN_BASE_URL, api_key=STEPFUN_API_KEY)
 elif LLAMACPP_API_KEY:
     client = openai.OpenAI(base_url=LLAMACPP_BASE_URL, api_key=LLAMACPP_API_KEY)
 elif OPENAI_API_KEY:
@@ -94,7 +94,6 @@ def send_telegram_message(text, topic):
         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"📌 Assunto: {topic}\n\n"
     )
     message = header + text
@@ -154,6 +153,7 @@ def job():
 
 def main():
     print("=== ThorAgentIA iniciado ===")
+    print(f"Provedor: {DEFAULT_AI_PROVIDER} | Modelo: {DEFAULT_AI_MODEL}")
     print(f"Horário permitido: {START_HOUR}h às {END_HOUR}h")
     print(f"Dias permitidos: {DAYS_OF_WEEK}")
     print(f"Intervalo: {INTERVAL_MINUTES} minutos")