✨ feat: Add TOML configuration support

[cxyfer]

Summary

• Added comprehensive TOML configuration support using config.toml
• Implemented environment variable override mechanism for sensitive data
• Maintained backward compatibility with existing .env files
• Created configuration management with singleton pattern

Changes Made

• New configuration system: Added utils/config.py with ConfigManager class
• TOML support: Added config.toml.example template with comprehensive settings
• Environment overrides: Environment variables take precedence over TOML values
• Backward compatibility: Existing .env files continue to work
• Updated dependencies: Added tomli for Python < 3.11 TOML support

Test Plan

• Test TOML configuration loading
• Test environment variable override functionality
• Test bot initialization with new configuration system
• Test fallback to .env when config.toml is missing
• Verify all configuration sections work properly

🤖 Generated with Claude Code

[Copilot]

Pull Request Overview

This PR adds full TOML-based configuration support with environment variable overrides, preserves .env fallback, and centralizes settings access via a singleton ConfigManager.

• Introduces a new ConfigManager for loading TOML, applying env overrides, and exposing typed getters
• Updates bot.py to initialize via ConfigManager and provide a .env-based fallback
• Adds tomli dependency, updates docs and examples for the new configuration methods

Reviewed Changes

Copilot reviewed 7 out of 9 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
utils/config.py	New ConfigManager handling TOML parsing, env overrides, and getters
utils/init.py	Exports get_config and ConfigManager
pyproject.toml	Added python-dotenv and tomli dependencies
config.toml.example	Full example of all supported config sections
bot.py	Loads configuration via ConfigManager, sets up logging, and falls back to .env
README.md	Documentation for TOML and env var configuration methods
.env.example	Clarified backward-compatibility notes and optional Gemini API key

Comments suppressed due to low confidence (2)

README.md:64

• [nitpick] The TOML example in the README omits the [bot] section for command_prefix. Add a snippet showing how to configure bot.command_prefix for completeness.

[schedule]

bot.py:50

• The call to load_dotenv (and subsequent os.getenv usage) requires imports for both os and load_dotenv from dotenv. Without these imports, this will raise a NameError.

    load_dotenv(dotenv_path='.env', verbose=True, override=True)

[Copilot]

[nitpick] The set_module_level import is unused in this file; consider removing it to keep imports clean.

Suggested change

	from utils.logger import setup_logging, get_logger, set_module_level
	from utils.logger import setup_logging, get_logger

[Copilot]

[nitpick] The DummyConfig class duplicates logic and default values from ConfigManager. Consider refactoring to reuse common code or reduce duplication.

Suggested change

	class DummyConfig:
	"""Compatibility wrapper for .env configuration"""
	def get(self, key, default=None):
	"""Get configuration value with .env fallback"""
	if key == "database.path":
	return "data/data.db"
	elif key == "schedule.post_time":
	return POST_TIME
	elif key == "schedule.timezone":
	return TIMEZONE
	return default
	def get_section(self, section):
	"""Get configuration section"""
	if section == "logging":
	return {
	"level": "INFO",
	"directory": "./logs",
	"modules": {
	"bot": "DEBUG",
	"bot.discord": "DEBUG",
	"bot.lcus": "DEBUG",
	"bot.db": "DEBUG",
	"discord": "WARNING",
	"discord.gateway": "WARNING",
	"discord.client": "WARNING",
	"requests": "WARNING"
	}
	}
	return {}
	def get_llm_model_config(self, model_type):
	"""Get LLM model configuration"""
	if model_type == "standard":
	return {"name": "gemini-2.5-flash", "temperature": 0.0}
	else:
	return {"name": "gemini-2.5-pro", "temperature": 0.0}
	def get_cache_expire_seconds(self, cache_type):
	"""Get cache expiration time"""
	return 3600 if cache_type == "translation" else 86400
	@property
	def discord_token(self):
	return DISCORD_TOKEN
	@property
	def gemini_api_key(self):
	return os.getenv('GOOGLE_GEMINI_API_KEY')
	@property
	def post_time(self):
	return POST_TIME
	@property
	def timezone(self):
	return TIMEZONE
	config = DummyConfig()
	class DummyConfig(get_config().__class__):
	"""Compatibility wrapper for .env configuration"""
	def __init__(self):
	super().__init__()
	self.env_values = {
	"discord_token": os.getenv('DISCORD_TOKEN'),
	"post_time": os.getenv('POST_TIME', '00:00'),
	"timezone": os.getenv('TIMEZONE', 'UTC'),
	"gemini_api_key": os.getenv('GOOGLE_GEMINI_API_KEY'),
	}
	def get(self, key, default=None):
	"""Get configuration value with .env fallback"""
	if key in self.env_values:
	return self.env_values[key]
	return super().get(key, default)
	@property
	def discord_token(self):
	return self.env_values["discord_token"]
	@property
	def gemini_api_key(self):
	return self.env_values["gemini_api_key"]
	@property
	def post_time(self):
	return self.env_values["post_time"]
	@property
	def timezone(self):
	return self.env_values["timezone"]
	config = DummyConfig()