fix(theme): R10 S1 follow-ups — dedicated info token + restore collapsed hovers

- Add --info/--info-fg (blue; dark #60a5fa / light #2563eb) so info notifications
  stop borrowing --accent, which collided with a status colour in schemes whose
  accent shares its hue (YouTube red = error, Slate orange = warn, Matrix/Forest
  green = success). Toaster info tone accent -> info.
- Restore hover feedback the codemod flattened: 'bg-X ... hover:bg-X' /
  'text-X ... hover:text-X' collapsed to a no-op once both shades mapped to one
  shadeless token. Reuse the house hover:opacity-{80,90} idiom (ConfirmProvider
  danger button, DownloadCenter error link).

frontend/src/components/Toaster.tsx

@@ -4,7 +4,7 @@ import { AlertCircle, AlertTriangle, CheckCircle2, Info, X, XCircle } from "luci
 import { dismiss, getActiveToasts, subscribe, type NotifLevel } from "../lib/notifications";
 
 export const LEVEL_STYLE: Record<NotifLevel, { icon: typeof Info; color: string; bar: string }> = {
-  info: { icon: Info, color: "text-accent", bar: "bg-accent" },
+  info: { icon: Info, color: "text-info", bar: "bg-info" },
   success: { icon: CheckCircle2, color: "text-success", bar: "bg-success" },
   warning: { icon: AlertTriangle, color: "text-warn", bar: "bg-warn" },
   error: { icon: AlertCircle, color: "text-danger", bar: "bg-danger" },