feat(admin-ui): implement UMKM admin dashboard and CRUD pages

src/app/admin/(dashboard)/ekonomi/umkm/penjualan/page.tsx

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+'use client'
+import {
+  Box,
+  Button,
+  Center,
+  Group,
+  Pagination,
+  Paper,
+  Skeleton,
+  Stack,
+  Table,
+  TableTbody,
+  TableTd,
+  TableTh,
+  TableThead,
+  TableTr,
+  Text,
+  Title
+} from '@mantine/core';
+import { useShallowEffect } from '@mantine/hooks';
+import { IconPlus, IconTrash } from '@tabler/icons-react';
+import { useProxy } from 'valtio/utils';
+import umkmState from '../../../_state/ekonomi/umkm/umkm';
+
+function PenjualanUmkm() {
+  const state = useProxy(umkmState.penjualan.findMany);
+
+  useShallowEffect(() => {
+    state.load(state.page, 10);
+  }, [state.page]);
+
+  return (
+    <Stack gap="lg">
+      <Group justify="space-between">
+        <Title order={3}>Histori Penjualan UMKM</Title>
+        <Button leftSection={<IconPlus size={18} />} color="blue">
+          Catat Penjualan
+        </Button>
+      </Group>
+
+      <Paper withBorder p="md" radius="md">
+        {state.loading ? (
+          <Skeleton height={400} />
+        ) : (
+          <Box style={{ overflowX: 'auto' }}>
+            <Table highlightOnHover>
+              <TableThead>
+                <TableTr>
+                  <TableTh>Tanggal</TableTh>
+                  <TableTh>Produk</TableTh>
+                  <TableTh>UMKM</TableTh>
+                  <TableTh>Jumlah</TableTh>
+                  <TableTh>Total Nilai</TableTh>
+                  <TableTh>Aksi</TableTh>
+                </TableTr>
+              </TableThead>
+              <TableTbody>
+                {state.data.map((item) => (
+                  <TableTr key={item.id}>
+                    <TableTd>{new Date(item.tanggal).toLocaleDateString('id-ID')}</TableTd>
+                    <TableTd fw={500}>{item.produk?.nama}</TableTd>
+                    <TableTd>{item.produk?.umkm?.nama}</TableTd>
+                    <TableTd>{item.jumlah}</TableTd>
+                    <TableTd fw={600}>Rp {item.totalNilai.toLocaleString()}</TableTd>
+                    <TableTd>
+                      <Button variant="subtle" color="red" size="xs">
+                        <IconTrash size={16} />
+                      </Button>
+                    </TableTd>
+                  </TableTr>
+                ))}
+              </TableTbody>
+            </Table>
+          </Box>
+        )}
+
+        <Center mt="md">
+          <Pagination
+            total={state.totalPages}
+            value={state.page}
+            onChange={(p) => state.load(p, 10)}
+          />
+        </Center>
+      </Paper>
+    </Stack>
+  );
+}
+
+export default PenjualanUmkm;