feat(web): add minimal Filter slide-over for invoice processing

Refs: AP-46

e2e/invoice-filter-drawer.spec.ts

@@ -0,0 +1,16 @@
+import { expect, test } from "@playwright/test";
+
+test.describe("Invoice Processing filter drawer (AP-46)", () => {
+  test("Filter drawer clears applied filters", async ({ page }) => {
+    await page.goto("/");
+    await page.getByTestId("vendor-filter").fill("Acme");
+    await page.getByTestId("filter-toggle").click();
+    const drawer = page.getByTestId("filter-drawer");
+    await expect(drawer).toBeVisible();
+    await expect(page.getByTestId("filter-drawer-vendor")).toContainText("Acme");
+
+    await page.getByTestId("filter-drawer-clear").click();
+    await expect(page.getByTestId("vendor-filter")).toHaveValue("");
+    await expect(page.getByTestId("filter-toggle").locator(".MuiBadge-badge")).toBeHidden();
+  });
+});

src/dashboard/DashboardGrids.tsx

@@ -2,6 +2,7 @@ import { useMemo, useState } from "react";
 import { Alert, Box, CircularProgress, Stack, Tab, Tabs, Typography } from "@mui/material";
 import type { GridRowParams, GridRowSelectionModel } from "@mui/x-data-grid";
 import { ColumnsDrawer } from "@/dashboard/ColumnsDrawer";
+import { FilterDrawer } from "@/dashboard/FilterDrawer";
 import { InvoiceFilterToolbar } from "@/dashboard/InvoiceFilterToolbar";
 import { CreatePayRunButton } from "@/dashboard/CreatePayRunButton";
 import { InvoiceDataGrid } from "@/dashboard/InvoiceDataGrid";
@@ -76,7 +77,7 @@ export function DashboardGrids() {
   const [selection, setSelection] = useState<GridRowSelectionModel>(emptySelection);
   const [filters, setFilters] = useState<InvoiceFilterState>(emptyFilters);
   const [columnsDrawerOpen, setColumnsDrawerOpen] = useState(false);
-  const [, setFilterDrawerOpen] = useState(false);
+  const [filterDrawerOpen, setFilterDrawerOpen] = useState(false);
   const [columnPrefs, setColumnPrefs] = useState<ColumnPrefs>(() => loadColumnPrefs());
   const { data: invoices = [], isLoading, isError, error } = useInvoices();
   const updatePayDate = useUpdateInvoicePayDate();
@@ -334,6 +335,12 @@ export function DashboardGrids() {
           setColumnPrefs(next);
         }}
       />
+      <FilterDrawer
+        open={filterDrawerOpen}
+        onClose={() => setFilterDrawerOpen(false)}
+        filters={filters}
+        onFiltersChange={setFilters}
+      />
     </Stack>
   );
 }

src/dashboard/FilterDrawer.tsx

@@ -0,0 +1,71 @@
+import CloseIcon from "@mui/icons-material/Close";
+import { Box, Button, Drawer, IconButton, Stack, Typography } from "@mui/material";
+import type { ReactElement } from "react";
+import { countActiveFilters, type InvoiceFilterState } from "@/dashboard/invoice-filters";
+
+type FilterDrawerProps = {
+  open: boolean;
+  onClose: () => void;
+  filters: InvoiceFilterState;
+  onFiltersChange: (next: InvoiceFilterState) => void;
+};
+
+export function FilterDrawer({
+  open,
+  onClose,
+  filters,
+  onFiltersChange,
+}: FilterDrawerProps): ReactElement {
+  const activeCount = countActiveFilters(filters);
+
+  return (
+    <Drawer
+      anchor="right"
+      open={open}
+      onClose={onClose}
+      data-testid="filter-drawer"
+      PaperProps={{ sx: { width: 360, p: 2 } }}
+    >
+      <Stack direction="row" alignItems="center" justifyContent="space-between" sx={{ mb: 2 }}>
+        <Typography variant="h6">Filters</Typography>
+        <IconButton aria-label="Close filters" onClick={onClose} size="small">
+          <CloseIcon />
+        </IconButton>
+      </Stack>
+
+      <Typography variant="body2" color="text.secondary" sx={{ mb: 2 }}>
+        {activeCount === 0
+          ? "No filters applied."
+          : `${activeCount} active filter${activeCount === 1 ? "" : "s"}.`}
+      </Typography>
+
+      <Stack spacing={1.5} sx={{ mb: 3 }}>
+        <Box>
+          <Typography variant="caption" color="text.secondary">
+            Action
+          </Typography>
+          <Typography variant="body2" data-testid="filter-drawer-action">
+            {filters.action ?? "—"}
+          </Typography>
+        </Box>
+        <Box>
+          <Typography variant="caption" color="text.secondary">
+            Vendor
+          </Typography>
+          <Typography variant="body2" data-testid="filter-drawer-vendor">
+            {filters.vendorQuery.trim() || "—"}
+          </Typography>
+        </Box>
+      </Stack>
+
+      <Button
+        variant="outlined"
+        data-testid="filter-drawer-clear"
+        disabled={activeCount === 0}
+        onClick={() => onFiltersChange({ action: null, vendorQuery: "" })}
+      >
+        Clear all
+      </Button>
+    </Drawer>
+  );
+}