feat: add discord guild map + group dm controls

CHANGELOG.md

@@ -12,6 +12,7 @@
   - per-skill config map moved to `skills.entries` (e.g. `skills.peekaboo.enabled` → `skills.entries.peekaboo.enabled`)
   - new optional bundled allowlist: `skills.allowBundled` (only affects bundled skills)
 - Sessions: group keys now use `surface:group:<id>` / `surface:channel:<id>`; legacy `group:*` keys migrate on next message; `groupdm` keys are no longer recognized.
+- Discord: remove legacy `discord.allowFrom`, `discord.guildAllowFrom`, and `discord.requireMention`; use `discord.dm` + `discord.guilds`.
 
 ### Features
 - Talk mode: continuous speech conversations (macOS/iOS/Android) with ElevenLabs TTS, reply directives, and optional interrupt-on-speech.
@@ -23,6 +24,7 @@
 - iMessage: add imsg JSON-RPC integration (stdio), chat_id routing, and group chat support.
 - Chat UI: add recent-session dropdown switcher (main first) in macOS/iOS/Android + Control UI.
 - Discord: allow agent-triggered reactions via `clawdis_discord` when enabled, and surface message ids in context.
+- Discord: revamp guild routing config with per-guild/channel rules and slugged display names; add optional group DM support (default off).
 - Skills: add Trello skill for board/list/card management (thanks @clawd).
 - Tests: add a Z.AI live test gate for smoke validation when keys are present.
 - macOS Debug: add app log verbosity and rolling file log toggle for swift-log-backed app logs.