refactor: simplify codebase with unified patterns and reduced duplication

- unify ChatConfigService setters into generic setPermission method
- replace PermissionService switch statements with data-driven checkers map
- deduplicate config.ts callback handlers via loop-based registration (414→254 lines)
- extract shared updateChatCommands utility from role-add/role-delete
- add proper generics to chunk utility, fix mention loop indexing
- extract isHiddenAdmin helper and ANONYMOUS_ADMIN_ID constant in perms
- remove debug console.logs, standardize arrow exports and type imports
- add roleAdminPermission schema and migration

src/bot/commands/admin/role-delete.ts

@@ -1,5 +1,6 @@
 import type { BotType } from '@/bot/index.js'
 import { bold, code, format } from 'gramio'
+import { updateChatCommands } from '@/bot/utilities/commands.js'
 import { PermissionService } from '@/shared/services/permission.js'
 import { RoleService } from '@/shared/services/role.js'
 
@@ -34,19 +35,7 @@ export default (bot: BotType) => {
       return ctx.reply('failed to delete role, skill issue')
     }
 
-    setImmediate(async () => {
-      const roles = await RoleService.getByChatId(ctx.chatId)
-      await bot.api.setMyCommands({
-        scope: {
-          chat_id: ctx.chatId,
-          type: 'chat',
-        },
-        commands: roles.map(role => ({
-          command: role.slug,
-          description: `Mention all members of this role`,
-        })),
-      })
-    })
+    updateChatCommands(bot, ctx.chatId)
 
     return ctx.reply(format`role ${bold(role.slug)} deleted`)
   })