feat(mui): migrate Warehouse Categories (Kategorie) onto MUI kit

Replace legacy admin-* CSS, FormModal, ConfirmModal, FormField, and
framer-motion wrappers with PageHeader, Card, DataTable, Modal,
ConfirmDialog, Field, TextField, EmptyState, LoadingState, and MUI
IconButton. All data logic preserved verbatim.

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

src/admin/pages/WarehouseCategories.tsx

@@ -1,18 +1,28 @@
 import { useState } from "react";
 import { useQuery } from "@tanstack/react-query";
+import Box from "@mui/material/Box";
+import IconButton from "@mui/material/IconButton";
 import { useAlert } from "../context/AlertContext";
 import { useAuth } from "../context/AuthContext";
 import Forbidden from "../components/Forbidden";
-import { motion } from "framer-motion";
-import ConfirmModal from "../components/ConfirmModal";
-import FormModal from "../components/FormModal";
-
-import FormField from "../components/FormField";
 import {
   warehouseCategoryListOptions,
   type WarehouseCategory,
 } from "../lib/queries/warehouse";
 import { useApiMutation } from "../lib/queries/mutations";
+import {
+  Button,
+  Card,
+  DataTable,
+  Modal,
+  ConfirmDialog,
+  Field,
+  TextField,
+  PageHeader,
+  EmptyState,
+  LoadingState,
+  type DataColumn,
+} from "../ui";
 
 const API_BASE = "/api/admin/warehouse/categories";
 
@@ -22,6 +32,50 @@ interface CategoryForm {
   sort_order: number;
 }
 
+const PlusIcon = (
+  <svg
+    width="20"
+    height="20"
+    viewBox="0 0 24 24"
+    fill="none"
+    stroke="currentColor"
+    strokeWidth="2"
+  >
+    <line x1="12" y1="5" x2="12" y2="19" />
+    <line x1="5" y1="12" x2="19" y2="12" />
+  </svg>
+);
+const EditIcon = (
+  <svg
+    width="18"
+    height="18"
+    viewBox="0 0 24 24"
+    fill="none"
+    stroke="currentColor"
+    strokeWidth="2"
+    strokeLinecap="round"
+    strokeLinejoin="round"
+  >
+    <path d="M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7" />
+    <path d="M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z" />
+  </svg>
+);
+const DeleteIcon = (
+  <svg
+    width="18"
+    height="18"
+    viewBox="0 0 24 24"
+    fill="none"
+    stroke="currentColor"
+    strokeWidth="2"
+    strokeLinecap="round"
+    strokeLinejoin="round"
+  >
+    <polyline points="3 6 5 6 21 6" />
+    <path d="M19 6v14a2 2 0 0 1-2 2H7a2 2 0 0 1-2-2V6m3 0V4a2 2 0 0 1 2-2h4a2 2 0 0 1 2 2v2" />
+  </svg>
+);
+
 export default function WarehouseCategories() {
   const alert = useAlert();
   const { hasPermission } = useAuth();
@@ -121,207 +175,145 @@ export default function WarehouseCategories() {
   };
 
   if (isPending) {
-    return (
+    return <LoadingState />;
-      <div className="admin-loading">
-        <div className="admin-spinner" />
-      </div>
-    );
   }
 
-  return (
+  const total = categories.length;
-    <div>
+  const subtitle = `${total} ${
-      <motion.div
+    total === 1
-        className="admin-page-header"
+      ? "kategorie"
-        initial={{ opacity: 0, y: 12 }}
+      : total >= 2 && total <= 4
-        animate={{ opacity: 1, y: 0 }}
+        ? "kategorie"
-        transition={{ duration: 0.25 }}
+        : "kategorií"
-      >
+  }`;
-        <div>
-          <h1 className="admin-page-title">Kategorie skladu</h1>
-        </div>
-        <div className="admin-page-actions">
-          <button
-            onClick={openCreateModal}
-            className="admin-btn admin-btn-primary"
-          >
-            <svg
-              width="20"
-              height="20"
-              viewBox="0 0 24 24"
-              fill="none"
-              stroke="currentColor"
-              strokeWidth="2"
-            >
-              <line x1="12" y1="5" x2="12" y2="19" />
-              <line x1="5" y1="12" x2="19" y2="12" />
-            </svg>
-            Přidat kategorii
-          </button>
-        </div>
-      </motion.div>
 
-      <motion.div
+  const columns: DataColumn<WarehouseCategory>[] = [
-        className="admin-card"
+    {
-        initial={{ opacity: 0, y: 12 }}
+      key: "name",
-        animate={{ opacity: 1, y: 0 }}
+      header: "Název",
-        transition={{ duration: 0.25, delay: 0.06 }}
+      width: "35%",
-      >
+      bold: true,
-        <div className="admin-card-body">
+      render: (c) => c.name,
-          {categories.length === 0 && (
+    },
-            <div className="admin-empty-state">
+    {
-              <div className="admin-empty-icon">
+      key: "description",
-                <svg
+      header: "Popis",
-                  width="28"
+      width: "40%",
-                  height="28"
+      render: (c) => c.description || "—",
-                  viewBox="0 0 24 24"
+    },
-                  fill="none"
+    {
-                  stroke="currentColor"
+      key: "sort_order",
-                  strokeWidth="1.5"
+      header: "Pořadí",
-                  strokeLinecap="round"
+      width: "15%",
-                  strokeLinejoin="round"
+      mono: true,
-                >
+      render: (c) => String(c.sort_order),
-                  <path d="M22 19a2 2 0 0 1-2 2H4a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h5l2 3h9a2 2 0 0 1 2 2z" />
+    },
-                </svg>
+    {
-              </div>
+      key: "actions",
-              <p>Zatím nejsou žádné kategorie.</p>
+      header: "Akce",
-              <button
+      width: "10%",
-                onClick={openCreateModal}
+      align: "right",
-                className="admin-btn admin-btn-primary"
+      render: (c) => (
-              >
+        <Box sx={{ display: "flex", gap: 0.5, justifyContent: "flex-end" }}>
-                Přidat první kategorii
+          <IconButton
-              </button>
+            size="small"
-            </div>
+            onClick={() => openEditModal(c)}
-          )}
-          {categories.length > 0 && (
-            <div className="admin-table-responsive">
-              <table className="admin-table">
-                <thead>
-                  <tr>
-                    <th>Název</th>
-                    <th>Popis</th>
-                    <th>Pořadí</th>
-                    <th>Akce</th>
-                  </tr>
-                </thead>
-                <tbody>
-                  {categories.map((category) => (
-                    <tr key={category.id}>
-                      <td className="fw-500">{category.name}</td>
-                      <td>{category.description || "—"}</td>
-                      <td className="admin-mono">{category.sort_order}</td>
-                      <td>
-                        <div className="admin-table-actions">
-                          <button
-                            onClick={() => openEditModal(category)}
-                            className="admin-btn-icon"
-                            title="Upravit"
             aria-label="Upravit"
+            title="Upravit"
           >
-                            <svg
+            {EditIcon}
-                              width="18"
+          </IconButton>
-                              height="18"
+          <IconButton
-                              viewBox="0 0 24 24"
+            size="small"
-                              fill="none"
+            color="error"
-                              stroke="currentColor"
+            onClick={() => setDeleteConfirm({ show: true, category: c })}
-                              strokeWidth="2"
-                              strokeLinecap="round"
-                              strokeLinejoin="round"
-                            >
-                              <path d="M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7" />
-                              <path d="M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z" />
-                            </svg>
-                          </button>
-                          <button
-                            onClick={() =>
-                              setDeleteConfirm({ show: true, category })
-                            }
-                            className="admin-btn-icon danger"
-                            title="Smazat"
             aria-label="Smazat"
+            title="Smazat"
           >
-                            <svg
+            {DeleteIcon}
-                              width="18"
+          </IconButton>
-                              height="18"
+        </Box>
-                              viewBox="0 0 24 24"
+      ),
-                              fill="none"
+    },
-                              stroke="currentColor"
+  ];
-                              strokeWidth="2"
+
-                              strokeLinecap="round"
+  return (
-                              strokeLinejoin="round"
+    <Box>
-                            >
+      <PageHeader
-                              <polyline points="3 6 5 6 21 6" />
+        title="Kategorie skladu"
-                              <path d="M19 6v14a2 2 0 0 1-2 2H7a2 2 0 0 1-2-2V6m3 0V4a2 2 0 0 1 2-2h4a2 2 0 0 1 2 2v2" />
+        subtitle={subtitle}
-                            </svg>
+        actions={
-                          </button>
+          <Button startIcon={PlusIcon} onClick={openCreateModal}>
-                        </div>
+            Přidat kategorii
-                      </td>
+          </Button>
-                    </tr>
+        }
-                  ))}
+      />
-                </tbody>
+
-              </table>
+      <Card>
-            </div>
+        <DataTable<WarehouseCategory>
-          )}
+          columns={columns}
-        </div>
+          rows={categories}
-      </motion.div>
+          rowKey={(c) => c.id}
+          empty={
+            <EmptyState
+              title="Zatím nejsou žádné kategorie."
+              action={
+                <Button startIcon={PlusIcon} onClick={openCreateModal}>
+                  Přidat první kategorii
+                </Button>
+              }
+            />
+          }
+        />
+      </Card>
 
       {/* Add/Edit Modal */}
-      <FormModal
+      <Modal
         isOpen={showModal}
         onClose={() => setShowModal(false)}
         onSubmit={handleSubmit}
         title={editingCategory ? "Upravit kategorii" : "Přidat kategorii"}
         loading={saving}
       >
-        <div className="admin-form">
+        <Field label="Název" required error={errors.name}>
-          <FormField label="Název" error={errors.name} required>
+          <TextField
-            <input
-              type="text"
             value={form.name}
+            error={!!errors.name}
             onChange={(e) => {
               setForm({ ...form, name: e.target.value });
               setErrors((prev) => ({ ...prev, name: "" }));
             }}
-              className="admin-form-input"
             placeholder="Název kategorie"
-              aria-invalid={!!errors.name}
           />
-          </FormField>
+        </Field>
 
-          <FormField label="Popis">
+        <Field label="Popis">
-            <textarea
+          <TextField
+            multiline
+            minRows={3}
             value={form.description}
-              onChange={(e) =>
+            onChange={(e) => setForm({ ...form, description: e.target.value })}
-                setForm({ ...form, description: e.target.value })
-              }
-              className="admin-form-input"
-              rows={3}
             placeholder="Volitelný popis kategorie"
           />
-          </FormField>
+        </Field>
 
-          <FormField label="Pořadí řazení">
+        <Field label="Pořadí řazení">
-            <input
+          <TextField
             type="number"
-              inputMode="numeric"
+            value={String(form.sort_order)}
-              value={form.sort_order}
             onChange={(e) =>
               setForm({
                 ...form,
                 sort_order: parseInt(e.target.value) || 0,
               })
             }
-              className="admin-form-input"
+            inputProps={{ min: 0 }}
-              min="0"
           />
-            <small className="admin-form-hint">
+        </Field>
-              Nižší hodnota = výše v seznamu
+      </Modal>
-            </small>
-          </FormField>
-        </div>
-      </FormModal>
 
       {/* Delete Confirmation */}
-      <ConfirmModal
+      <ConfirmDialog
         isOpen={deleteConfirm.show}
         onClose={() => setDeleteConfirm({ show: false, category: null })}
         onConfirm={handleDelete}
@@ -333,7 +325,8 @@ export default function WarehouseCategories() {
         }
         confirmText="Smazat"
         confirmVariant="danger"
+        loading={deleteMutation.isPending}
       />
-    </div>
+    </Box>
   );
 }