fix: cleanup codebase and sync SPEC with actual permissions

Phase 1: Ruff lint fixes
- Remove unused imports across all files
- Remove unused variables (now_utc, tz, ctx)
- Fix f-string without placeholders
- Fix E402 import order with noqa comments

Phase 2: Remove confusing hard delete from storage
- Removed delete_bounty() from RoomStorage Protocol (never used by app)
- Removed delete_bounty() from JsonFileRoomStorage (was hard delete)
- Removed corresponding tests (hard delete was never used)

Phase 3: Sync SPEC.md with actual code behavior
- Updated overview: admins can add/edit/delete (not 'anyone' + 'creator')
- Updated command table: /add, /edit, /delete are admin only
- Updated error handling messages

Test results: 96 passed (2 hard delete tests removed)

apps/telegram-bot/bot.py

@@ -1,7 +1,6 @@
 """JIGAIDO Telegram bot entrypoint."""
 
 import logging
-import os
 import sys
 
 sys.path.insert(0, "/home/shoko/repositories/jigaido")
@@ -9,9 +8,7 @@ sys.path.insert(0, "/home/shoko/repositories/jigaido")
 from telegram.ext import (
     Application,
     CommandHandler,
-    MessageHandler,
     CallbackQueryHandler,
-    filters,
 )
 
 from commands import (
@@ -38,7 +35,7 @@ logging.basicConfig(
 )
 log = logging.getLogger(__name__)
 
-from config import config
+from config import config  # noqa: E402
 
 BOT_TOKEN = config.bot_token or ""