fix: CLI spec contradictions from codex AX audit

- Fix paths: relative to agent home dir, not hardcoded /home/agent
- Add worker/dream coordination: dream pauses worker to prevent file races
- Watch registration via .colony.toml (server reads agent config)
- Remove remaining old mentions API reference (use inbox instead)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

ui/colony/src/components/MessageItem.tsx

@@ -209,7 +209,7 @@ export function MessageItem({ message, compact, lastInGroup, replyTarget, onSele
 
         {/* Content */}
         <div className={cn(
-          "mt-1 text-[13px] leading-relaxed break-words font-mono",
+          "mt-1 text-sm leading-relaxed break-words font-mono",
           message.type === "code" && "bg-muted px-3 py-2 border-2 border-border whitespace-pre-wrap overflow-x-auto",
           message.type === "error" && "text-[var(--color-msg-error)]",
         )}>