fix(ui): unify icon badges — solid tile + white glyph via shared helper

The labelled icon-badge tiles were inconsistent: some used a same-hue
light tile + colored glyph (e.g. the Settings 2FA row: success.light tile
+ success.main glyph — low contrast, the reported "badly visible" icon),
and the solid-tile ones used the bright .main fill in dark mode without
darkening, so a white glyph on bright green/amber was low-contrast too
(DashProfile's success badge was ~1.9:1).

Add a single `iconBadgeSx(color)` helper (theme.ts): solid `<color>.main`
fill + white glyph, darkened in dark mode (FILLED_DARK_BG) so white stays
legible; `default` = neutral grey. Applied to every badge so they can't
drift: StatCard, DashActivityFeed, DashProfile (2FA badge), Dashboard
(2FA banner icon), AttendanceHistory (month tile), and the Settings 2FA
row tile (now solid green when required / grey when optional + white lock,
instead of the low-contrast light-green tile). Also switched DashProfile's
backup-codes warning callout from warning.light to a subtle warning wash
so its amber text stays readable in dark mode.

tsc -b --noEmit, npm run build, vitest 152/152 all clean.

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

src/admin/components/dashboard/DashActivityFeed.tsx

@@ -2,6 +2,7 @@ import { Link as RouterLink } from "react-router-dom";
 import Box from "@mui/material/Box";
 import Typography from "@mui/material/Typography";
 import { Card, Button, EmptyState } from "../../ui";
+import { iconBadgeSx, type IconBadgeColor } from "../../theme";
 import {
   ENTITY_TYPE_LABELS,
   getActivityIconClass,
@@ -159,7 +160,8 @@ export default function DashActivityFeed({
                 }}
               >
                 <Box
-                  sx={{
+                  sx={[
+                    {
                       display: "flex",
                       alignItems: "center",
                       justifyContent: "center",
@@ -167,9 +169,11 @@ export default function DashActivityFeed({
                       height: 32,
                       borderRadius: "50%",
                       flexShrink: 0,
-                    bgcolor: isDefault ? "grey.600" : `${badgeColor}.main`,
+                    },
-                    color: "common.white",
+                    iconBadgeSx(
-                  }}
+                      isDefault ? "default" : (badgeColor as IconBadgeColor),
+                    ),
+                  ]}
                 >
                   {getActivityIcon(act.action)}
                 </Box>

src/admin/components/dashboard/DashProfile.tsx

@@ -10,6 +10,7 @@ import DialogActions from "@mui/material/DialogActions";
 import { useAuth } from "../../context/AuthContext";
 import { useAlert } from "../../context/AlertContext";
 import apiFetch from "../../utils/api";
+import { iconBadgeSx } from "../../theme";
 import { Card, Button, Modal, Field, TextField } from "../../ui";
 import useDialogScrollLock from "../../ui/useDialogScrollLock";
 
@@ -251,7 +252,8 @@ export default function DashProfile({
             >
               <Box sx={{ display: "flex", alignItems: "center", gap: 1.5 }}>
                 <Box
-                  sx={{
+                  sx={[
+                    {
                       width: 36,
                       height: 36,
                       borderRadius: "50%",
@@ -259,9 +261,9 @@ export default function DashProfile({
                       alignItems: "center",
                       justifyContent: "center",
                       flexShrink: 0,
-                    bgcolor: totpEnabled ? "success.main" : "grey.600",
+                    },
-                    color: "common.white",
+                    iconBadgeSx(totpEnabled ? "success" : "default"),
-                  }}
+                  ]}
                 >
                   <svg
                     width="18"
@@ -425,7 +427,8 @@ export default function DashProfile({
                   p: 1.5,
                   mb: 2,
                   borderRadius: 2,
-                  bgcolor: "warning.light",
+                  bgcolor:
+                    "rgba(var(--mui-palette-warning-mainChannel) / 0.12)",
                   color: "warning.main",
                   fontSize: "0.875rem",
                 }}

src/admin/pages/AttendanceHistory.tsx

@@ -5,6 +5,7 @@ import Typography from "@mui/material/Typography";
 import { useAuth } from "../context/AuthContext";
 import Forbidden from "../components/Forbidden";
 import { companySettingsOptions } from "../lib/queries/settings";
+import { iconBadgeSx } from "../theme";
 import {
   attendanceHistoryOptions,
   type AttendanceRecord,
@@ -533,17 +534,18 @@ export default function AttendanceHistory() {
             }}
           >
             <Box
-              sx={{
+              sx={[
+                {
                   display: "flex",
                   alignItems: "center",
                   justifyContent: "center",
                   width: 44,
                   height: 44,
                   borderRadius: 2,
-                bgcolor: "info.main",
-                color: "#fff",
                   flexShrink: 0,
-              }}
+                },
+                iconBadgeSx("info"),
+              ]}
             >
               <svg
                 width="24"

src/admin/pages/Dashboard.tsx

@@ -12,6 +12,7 @@ import { require2FAOptions } from "../lib/queries/settings";
 import { getCzechDate } from "../utils/dashboardHelpers";
 import { useApiMutation } from "../lib/queries/mutations";
 import { Card, Button, StatusChip, PageEnter } from "../ui";
+import { iconBadgeSx } from "../theme";
 import DashKpiCards from "../components/dashboard/DashKpiCards";
 import DashQuickActions from "../components/dashboard/DashQuickActions";
 import DashActivityFeed from "../components/dashboard/DashActivityFeed";
@@ -253,17 +254,18 @@ export default function Dashboard() {
           >
             <Box sx={{ display: "flex", alignItems: "center", gap: 1.5 }}>
               <Box
-                sx={{
+                sx={[
+                  {
                     width: 40,
                     height: 40,
                     borderRadius: "50%",
                     display: "flex",
                     alignItems: "center",
                     justifyContent: "center",
-                  bgcolor: "error.main",
-                  color: "#fff",
                     flexShrink: 0,
-                }}
+                  },
+                  iconBadgeSx("error"),
+                ]}
               >
                 <svg
                   width="20"

src/admin/pages/Settings.tsx

@@ -33,6 +33,7 @@ import {
 
 import { useApiMutation } from "../lib/queries/mutations";
 import apiFetch from "../utils/api";
+import { iconBadgeSx } from "../theme";
 const API_BASE = "/api/admin";
 
 const PlusIcon = (
@@ -842,17 +843,18 @@ export default function Settings() {
               >
                 <Box sx={{ display: "flex", alignItems: "center", gap: 1.5 }}>
                   <Box
-                    sx={{
+                    sx={[
+                      {
                         width: 36,
                         height: 36,
                         borderRadius: "50%",
                         display: "flex",
                         alignItems: "center",
                         justifyContent: "center",
-                      bgcolor: require2FA ? "success.light" : "action.hover",
-                      color: require2FA ? "success.main" : "text.secondary",
                         flexShrink: 0,
-                    }}
+                      },
+                      iconBadgeSx(require2FA ? "success" : "default"),
+                    ]}
                   >
                     <svg
                       width="18"

src/admin/theme.ts

@@ -1,4 +1,4 @@
-import { createTheme } from "@mui/material/styles";
+import { createTheme, type Theme } from "@mui/material/styles";
 
 const FONT_BODY = "'Plus Jakarta Sans', system-ui, sans-serif";
 const FONT_HEADING = "'Urbanist', sans-serif";
@@ -226,3 +226,29 @@ export const fonts = {
   heading: FONT_HEADING,
   mono: FONT_MONO,
 };
+
+export type IconBadgeColor =
+  | "default"
+  | "primary"
+  | "success"
+  | "warning"
+  | "error"
+  | "info";
+
+/**
+ * sx fragment for a solid icon-badge tile: a `<color>.main` fill with a WHITE
+ * glyph, darkened in dark mode (FILLED_DARK_BG) so white stays legible on the
+ * otherwise-bright success/warning/info/error fills. `default` = neutral grey.
+ * Single source of truth for every labelled icon badge — use in an sx array
+ * next to the tile's size/shape so they can never drift apart:
+ *   sx={[{ width: 40, height: 40, borderRadius: 2, display: "flex", … }, iconBadgeSx(color)]}
+ */
+export function iconBadgeSx(color: IconBadgeColor) {
+  const bg = color === "default" ? "grey.600" : `${color}.main`;
+  const darkBg = (FILLED_DARK_BG as Record<string, { bg: string }>)[color]?.bg;
+  return (theme: Theme) => ({
+    bgcolor: bg,
+    color: "common.white",
+    ...(darkBg ? theme.applyStyles("dark", { backgroundColor: darkBg }) : {}),
+  });
+}

src/admin/ui/StatCard.tsx

@@ -2,7 +2,7 @@ import type { ReactNode } from "react";
 import Box from "@mui/material/Box";
 import Typography from "@mui/material/Typography";
 import Card from "./Card";
-import { FILLED_DARK_BG } from "../theme";
+import { iconBadgeSx } from "../theme";
 
 export type StatCardColor =
   | "default"
@@ -31,33 +31,23 @@ export default function StatCard({
   color = "default",
   footer,
 }: StatCardProps) {
-  // Solid tile + white glyph: high-contrast in both themes (the old light tint
-  // left the icon dark/low-visibility, esp. for the default variant). In dark
-  // mode the bright .main fill is darkened (same rule as filled buttons/chips)
-  // so the white glyph stays legible on success/warning/info/error tiles.
-  const iconBg = color === "default" ? "grey.600" : `${color}.main`;
-  const iconDarkBg = (FILLED_DARK_BG as Record<string, { bg: string }>)[color]
-    ?.bg;
-
   return (
     <Card>
       <Box sx={{ display: "flex", alignItems: "flex-start", gap: 1.5 }}>
         {icon && (
           <Box
-            sx={(theme) => ({
+            sx={[
+              {
                 display: "flex",
                 alignItems: "center",
                 justifyContent: "center",
                 width: 40,
                 height: 40,
                 borderRadius: 2,
-              bgcolor: iconBg,
-              color: "common.white",
                 flexShrink: 0,
-              ...(iconDarkBg
+              },
-                ? theme.applyStyles("dark", { backgroundColor: iconDarkBg })
+              iconBadgeSx(color),
-                : {}),
+            ]}
-            })}
           >
             {icon}
           </Box>