feat: add summary and search commands (#54)

* feat: add summary and search commands

Signed-off-by: Frost Ming <me@frostming.com>

* fix formats

Signed-off-by: Frost Ming <me@frostming.com>

* fix: clean up

Signed-off-by: Frost Ming <me@frostming.com>

config.py

@@ -0,0 +1,35 @@
+from functools import cached_property
+
+import openai
+from pydantic_settings import BaseSettings, SettingsConfigDict
+
+
+class Settings(BaseSettings):
+    model_config = SettingsConfigDict(env_file=".env")
+
+    telegram_bot_token: str
+    timezone: str = "Asia/Shanghai"
+
+    openai_api_key: str | None = None
+    openai_model: str = "gpt-4o-mini"
+    openai_base_url: str = "https://api.openai.com/v1"
+
+    google_gemini_api_key: str | None = None
+    anthropic_api_key: str | None = None
+    telegra_ph_token: str | None = None
+
+    @cached_property
+    def openai_client(self) -> openai.OpenAI:
+        return openai.OpenAI(
+            api_key=self.openai_api_key,
+            base_url=self.openai_base_url,
+        )
+
+    @cached_property
+    def telegraph_client(self):
+        from handlers._telegraph import TelegraphAPI
+
+        return TelegraphAPI(self.telegra_ph_token)
+
+
+settings = Settings()  # type: ignore