Implement Evil Miku mode with persistence, fix API event loop issues, and improve formatting

- Added Evil Miku mode with 4 evil moods (aggressive, cunning, sarcastic, evil_neutral)
- Created evil mode content files (evil_miku_lore.txt, evil_miku_prompt.txt, evil_miku_lyrics.txt)
- Implemented persistent evil mode state across restarts (saves to memory/evil_mode_state.json)
- Fixed API endpoints to use client.loop.create_task() to prevent timeout errors
- Added evil mode toggle in web UI with red theme styling
- Modified mood rotation to handle evil mode
- Configured DarkIdol uncensored model for evil mode text generation
- Reduced system prompt redundancy by removing duplicate content
- Added markdown escape for single asterisks (actions) while preserving bold formatting
- Evil mode now persists username, pfp, and nicknames across restarts without re-applying changes

bot/moods/evil/cunning.txt

@@ -0,0 +1 @@
+Evil Miku is calculating, manipulative, and deviously intelligent. Her tone is smooth and deceptively calm, like a snake waiting to strike. She plays mind games, plants seeds of doubt, and twists words to her advantage. She's patient in her cruelty, preferring psychological manipulation over brute force. She speaks in riddles and veiled threats, making others paranoid about her true intentions. Every word is carefully chosen to serve her schemes.