Refactor: remove unused cogs and services, simplify architecture

- Remove admin.py and search.py cogs
- Remove searxng.py service and rate_limiter.py utility
- Update bot.py, ai_chat.py, config.py, and ai_service.py
- Update documentation and docker-compose.yml

src/daemon_boyfriend/cogs/ai_chat.py

@@ -1,10 +1,9 @@
-"""AI Chat cog - handles chat commands and mention responses."""
+"""AI Chat cog - handles mention responses."""
 
 import logging
 import re
 
 import discord
-from discord import app_commands
 from discord.ext import commands
 
 from daemon_boyfriend.config import settings
@@ -66,42 +65,13 @@ def split_message(content: str, max_length: int = MAX_MESSAGE_LENGTH) -> list[st
 
 
 class AIChatCog(commands.Cog):
-    """AI conversation commands and mention handling."""
+    """AI conversation via mentions."""
 
     def __init__(self, bot: commands.Bot) -> None:
         self.bot = bot
         self.ai_service = AIService()
         self.conversations = ConversationManager()
 
-    @app_commands.command(name="chat", description="Chat with Daemon Boyfriend")
-    @app_commands.describe(message="Your message to the bot")
-    async def chat(self, interaction: discord.Interaction, message: str) -> None:
-        """Slash command to chat with the AI."""
-        await interaction.response.defer(thinking=True)
-
-        try:
-            response_text = await self._generate_response(interaction.user.id, message)
-
-            # Split long responses
-            chunks = split_message(response_text)
-            await interaction.followup.send(chunks[0])
-
-            # Send additional chunks as follow-up messages
-            for chunk in chunks[1:]:
-                await interaction.followup.send(chunk)
-
-        except Exception as e:
-            logger.error(f"Chat error: {e}", exc_info=True)
-            await interaction.followup.send("Sorry, I encountered an error. Please try again.")
-
-    @app_commands.command(name="clear", description="Clear your conversation history")
-    async def clear_history(self, interaction: discord.Interaction) -> None:
-        """Clear the user's conversation history."""
-        self.conversations.clear_history(interaction.user.id)
-        await interaction.response.send_message(
-            "Your conversation history has been cleared!", ephemeral=True
-        )
-
     @commands.Cog.listener()
     async def on_message(self, message: discord.Message) -> None:
         """Respond when the bot is mentioned."""
@@ -117,8 +87,8 @@ class AIChatCog(commands.Cog):
         content = self._extract_message_content(message)
 
         if not content:
-            # Just a mention with no message
-            await message.reply(f"Hey {message.author.display_name}! How can I help you?")
+            # Just a mention with no message - use configured description
+            await message.reply(f"Hey {message.author.display_name}! {settings.bot_description}")
             return
 
         # Show typing indicator while generating response