fix(mui): Dashboard icon badges (activity feed + 2FA status) — solid tile + white glyph

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/admin/components/dashboard/DashActivityFeed.tsx

@@ -167,8 +167,8 @@ export default function DashActivityFeed({
                     height: 32,
                     borderRadius: "50%",
                     flexShrink: 0,
-                    bgcolor: isDefault ? "action.hover" : `${badgeColor}.light`,
-                    color: isDefault ? "text.secondary" : `${badgeColor}.main`,
+                    bgcolor: isDefault ? "grey.600" : `${badgeColor}.main`,
+                    color: "common.white",
                   }}
                 >
                   {getActivityIcon(act.action)}

src/admin/components/dashboard/DashProfile.tsx

@@ -259,8 +259,8 @@ export default function DashProfile({
                     alignItems: "center",
                     justifyContent: "center",
                     flexShrink: 0,
-                    bgcolor: totpEnabled ? "success.light" : "action.hover",
-                    color: totpEnabled ? "success.main" : "text.secondary",
+                    bgcolor: totpEnabled ? "success.main" : "grey.600",
+                    color: "common.white",
                   }}
                 >
                   <svg