feat(mui): migrate Leave Requests (Žádosti) onto MUI kit

Replaces admin-* CSS, ConfirmModal, and legacy markup with PageHeader,
Card, DataTable, ConfirmDialog, StatusChip, EmptyState, LoadingState.
Dual StatusChip badges per row: leave-type (info/error/default) and
status (warning/success/error/default). Note cell preserved with Box
title-tooltip and ellipsis truncation. cancelMutation and invalidate:
["leave-requests", "leave", "attendance"] preserved verbatim.

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

src/admin/pages/LeaveRequests.tsx

@@ -3,11 +3,22 @@ import { useQuery } from "@tanstack/react-query";
 import { useAlert } from "../context/AlertContext";
 import { useAuth } from "../context/AuthContext";
 import { motion } from "framer-motion";
+import Box from "@mui/material/Box";
 import Forbidden from "../components/Forbidden";
 import { formatDate, formatDatetime } from "../utils/attendanceHelpers";
-import ConfirmModal from "../components/ConfirmModal";
 import { leaveRequestsOptions, type LeaveRequest } from "../lib/queries/leave";
 import { useApiMutation } from "../lib/queries/mutations";
+import {
+  Button,
+  Card,
+  DataTable,
+  ConfirmDialog,
+  StatusChip,
+  PageHeader,
+  EmptyState,
+  LoadingState,
+  type DataColumn,
+} from "../ui";
 
 const API_BASE = "/api/admin";
 
@@ -24,18 +35,40 @@ const statusLabels: Record<string, string> = {
   cancelled: "Zrušeno",
 };
 
-const statusClasses: Record<string, string> = {
-  pending: "badge-pending",
-  approved: "badge-approved",
-  rejected: "badge-rejected",
-  cancelled: "badge-cancelled",
+// Leave type → StatusChip color
+const leaveTypeColor: Record<
+  string,
+  "info" | "error" | "default" | "success" | "warning"
+> = {
+  vacation: "info",
+  sick: "error",
+  unpaid: "default",
 };
 
-const leaveTypeClasses: Record<string, string> = {
-  vacation: "badge-vacation",
-  sick: "badge-sick",
-  unpaid: "badge-unpaid",
-};
+// Status → StatusChip color
+const statusColor: Record<string, "warning" | "success" | "error" | "default"> =
+  {
+    pending: "warning",
+    approved: "success",
+    rejected: "error",
+    cancelled: "default",
+  };
+
+const CancelIcon = (
+  <svg
+    width="16"
+    height="16"
+    viewBox="0 0 24 24"
+    fill="none"
+    stroke="currentColor"
+    strokeWidth="2"
+    strokeLinecap="round"
+    strokeLinejoin="round"
+  >
+    <line x1="18" y1="6" x2="6" y2="18" />
+    <line x1="6" y1="6" x2="18" y2="18" />
+  </svg>
+);
 
 export default function LeaveRequests() {
   const alert = useAlert();
@@ -72,167 +105,179 @@ export default function LeaveRequests() {
     }
   };
 
-  function renderNoteCell(req: LeaveRequest) {
-    const truncate = (text: string) =>
-      text.length > 40 ? `${text.substring(0, 40)}...` : text;
-    if (req.status === "rejected" && req.reviewer_note) {
-      return (
-        <span
-          style={{ color: "var(--danger)", fontSize: "0.875rem" }}
-          title={req.reviewer_note}
-        >
-          {truncate(req.reviewer_note)}
-        </span>
-      );
-    }
-    if (req.notes) {
-      return (
-        <span
-          className="text-secondary"
-          style={{ fontSize: "0.875rem" }}
-          title={req.notes}
-        >
-          {truncate(req.notes)}
-        </span>
-      );
-    }
-    return <span className="text-muted">—</span>;
+  if (isPending) {
+    return <LoadingState />;
   }
 
-  if (isPending) {
-    return (
-      <div className="admin-loading">
-        <div className="admin-spinner" />
-      </div>
-    );
-  }
+  const columns: DataColumn<LeaveRequest>[] = [
+    {
+      key: "leave_type",
+      header: "Typ",
+      width: "14%",
+      render: (req) => (
+        <StatusChip
+          label={leaveTypeLabels[req.leave_type] || req.leave_type}
+          color={leaveTypeColor[req.leave_type] ?? "default"}
+        />
+      ),
+    },
+    {
+      key: "date_from",
+      header: "Od",
+      width: "11%",
+      mono: true,
+      render: (req) => formatDate(req.date_from),
+    },
+    {
+      key: "date_to",
+      header: "Do",
+      width: "11%",
+      mono: true,
+      render: (req) => formatDate(req.date_to),
+    },
+    {
+      key: "total_days",
+      header: "Dny",
+      width: "7%",
+      mono: true,
+      render: (req) => String(req.total_days),
+    },
+    {
+      key: "total_hours",
+      header: "Hodiny",
+      width: "8%",
+      mono: true,
+      render: (req) => `${req.total_hours}h`,
+    },
+    {
+      key: "status",
+      header: "Stav",
+      width: "16%",
+      render: (req) => (
+        <StatusChip
+          label={statusLabels[req.status] || req.status}
+          color={statusColor[req.status] ?? "default"}
+        />
+      ),
+    },
+    {
+      key: "notes",
+      header: "Poznámka",
+      width: "20%",
+      render: (req) => {
+        const truncate = (text: string) =>
+          text.length > 40 ? `${text.substring(0, 40)}...` : text;
+        if (req.status === "rejected" && req.reviewer_note) {
+          return (
+            <Box
+              component="span"
+              title={req.reviewer_note}
+              sx={{
+                color: "error.main",
+                fontSize: "0.875rem",
+                display: "block",
+                overflow: "hidden",
+                textOverflow: "ellipsis",
+                whiteSpace: "nowrap",
+              }}
+            >
+              {truncate(req.reviewer_note)}
+            </Box>
+          );
+        }
+        if (req.notes) {
+          return (
+            <Box
+              component="span"
+              title={req.notes}
+              sx={{
+                color: "text.secondary",
+                fontSize: "0.875rem",
+                display: "block",
+                overflow: "hidden",
+                textOverflow: "ellipsis",
+                whiteSpace: "nowrap",
+              }}
+            >
+              {truncate(req.notes)}
+            </Box>
+          );
+        }
+        return (
+          <Box component="span" sx={{ color: "text.disabled" }}>
+            —
+          </Box>
+        );
+      },
+    },
+    {
+      key: "created_at",
+      header: "Podáno",
+      width: "13%",
+      mono: true,
+      render: (req) => formatDatetime(req.created_at),
+    },
+    {
+      key: "actions",
+      header: "Akce",
+      width: "8%",
+      align: "right",
+      render: (req) =>
+        req.status === "pending" ? (
+          <Button
+            size="small"
+            variant="outlined"
+            startIcon={CancelIcon}
+            onClick={() => setCancelModal({ open: true, id: req.id })}
+          >
+            Zrušit
+          </Button>
+        ) : null,
+    },
+  ];
 
   return (
-    <div>
+    <Box>
       <motion.div
-        className="admin-page-header"
         initial={{ opacity: 0, y: 12 }}
         animate={{ opacity: 1, y: 0 }}
         transition={{ duration: 0.25 }}
       >
-        <div>
-          <h1 className="admin-page-title">Moje žádosti</h1>
-          <p className="admin-page-subtitle">Přehled žádostí o nepřítomnost</p>
-        </div>
+        <PageHeader
+          title="Moje žádosti"
+          subtitle="Přehled žádostí o nepřítomnost"
+        />
       </motion.div>
 
       <motion.div
-        className="admin-card"
         initial={{ opacity: 0, y: 12 }}
         animate={{ opacity: 1, y: 0 }}
         transition={{ duration: 0.25, delay: 0.06 }}
       >
-        <div className="admin-card-body">
-          {requests.length === 0 ? (
-            <div className="admin-empty-state">
-              <div className="admin-empty-icon">
-                <svg
-                  width="28"
-                  height="28"
-                  viewBox="0 0 24 24"
-                  fill="none"
-                  stroke="currentColor"
-                  strokeWidth="1.5"
-                  strokeLinecap="round"
-                  strokeLinejoin="round"
-                >
-                  <rect x="3" y="4" width="18" height="18" rx="2" ry="2" />
-                  <line x1="16" y1="2" x2="16" y2="6" />
-                  <line x1="8" y1="2" x2="8" y2="6" />
-                  <line x1="3" y1="10" x2="21" y2="10" />
-                </svg>
-              </div>
-              <p>Zatím nemáte žádné žádosti</p>
-              <p style={{ fontSize: "0.875rem", color: "var(--text-muted)" }}>
-                Novou žádost můžete podat na stránce Docházka
-              </p>
-            </div>
-          ) : (
-            <div className="admin-table-responsive">
-              <table className="admin-table">
-                <thead>
-                  <tr>
-                    <th>Typ</th>
-                    <th>Od</th>
-                    <th>Do</th>
-                    <th>Dny</th>
-                    <th>Hodiny</th>
-                    <th>Stav</th>
-                    <th>Poznámka</th>
-                    <th>Podáno</th>
-                    <th>Akce</th>
-                  </tr>
-                </thead>
-                <tbody>
-                  {requests.map((req) => (
-                    <tr key={req.id}>
-                      <td>
-                        <span
-                          className={`attendance-leave-badge ${leaveTypeClasses[req.leave_type] || ""}`}
-                        >
-                          {leaveTypeLabels[req.leave_type] || req.leave_type}
-                        </span>
-                      </td>
-                      <td className="admin-mono">
-                        {formatDate(req.date_from)}
-                      </td>
-                      <td className="admin-mono">{formatDate(req.date_to)}</td>
-                      <td className="admin-mono">{req.total_days}</td>
-                      <td className="admin-mono">{req.total_hours}h</td>
-                      <td>
-                        <span
-                          className={`admin-badge ${statusClasses[req.status] || ""}`}
-                        >
-                          {statusLabels[req.status] || req.status}
-                        </span>
-                      </td>
-                      <td style={{ maxWidth: "200px" }}>
-                        {renderNoteCell(req)}
-                      </td>
-                      <td
-                        className="admin-mono"
-                        style={{ whiteSpace: "nowrap" }}
-                      >
-                        {formatDatetime(req.created_at)}
-                      </td>
-                      <td>
-                        <div className="admin-table-actions">
-                          {req.status === "pending" && (
-                            <button
-                              onClick={() =>
-                                setCancelModal({ open: true, id: req.id })
-                              }
-                              className="admin-btn admin-btn-secondary admin-btn-sm"
-                            >
-                              Zrušit
-                            </button>
-                          )}
-                        </div>
-                      </td>
-                    </tr>
-                  ))}
-                </tbody>
-              </table>
-            </div>
-          )}
-        </div>
+        <Card>
+          <DataTable<LeaveRequest>
+            columns={columns}
+            rows={requests}
+            rowKey={(req) => req.id}
+            empty={
+              <EmptyState
+                title="Zatím nemáte žádné žádosti"
+                description="Novou žádost můžete podat na stránce Docházka"
+              />
+            }
+          />
+        </Card>
       </motion.div>
 
-      <ConfirmModal
+      <ConfirmDialog
         isOpen={cancelModal.open}
         onClose={() => setCancelModal({ open: false, id: null })}
         onConfirm={handleCancel}
         title="Zrušit žádost"
         message="Opravdu chcete zrušit tuto žádost o nepřítomnost?"
         confirmText="Zrušit žádost"
-        type="warning"
         loading={cancelMutation.isPending}
       />
-    </div>
+    </Box>
   );
 }