feat(reports): render generate-report form from OpenAPI spec

Replace hand-written GenerateReportPanel inputs with a generic loop over
extractFields("ReportQuery") + FormFieldRenderer; submit via
useResource("reports").create with server-side validation only.

react-openapi additions (all additive):
- lift items.enum into FieldConfig.enumValues for array-of-enum props
- extract schema `default` into FieldConfig.defaultValue
- new MultiEnumField renderer dispatched for isArray && enumValues
- FKFieldConfig.value: bind option values to a target property instead
  of the primary key (account names); sanitize-payload skips resolveFk
  when set
- new useFkFieldOptions hook encapsulating FK option loading/prefetch
- export extractFields, useFkFieldOptions, MultiEnumField

Drop now-unused granularityOptions/groupDimOptions helpers.

react-openapi/src/components/fields/FormFieldRenderer.tsx

@@ -6,6 +6,7 @@ import { NumberField } from "./renderers/NumberField";
 import { DateField } from "./renderers/DateField";
 import { BooleanField } from "./renderers/BooleanField";
 import { EnumField } from "./renderers/EnumField";
+import { MultiEnumField } from "./renderers/MultiEnumField";
 import { FkSelectField } from "./renderers/FkSelectField";
 import { FkMultiSelectField } from "./renderers/FkMultiSelectField";
 import { FileUploadField } from "./renderers/FileUploadField";
@@ -81,6 +82,17 @@ export function FormFieldRenderer({ field, value, onChange, error, fkOptions, fk
     );
   }
 
+  if (field.isArray && field.enumValues) {
+    return (
+      <MultiEnumField
+        field={field}
+        value={value}
+        onChange={onChange}
+        error={error}
+      />
+    );
+  }
+
   if (field.enumValues) {
     return (
       <EnumField

react-openapi/src/components/fields/index.ts

@@ -3,4 +3,5 @@ export { ListCellRenderer } from "./ListCellRenderer";
 export { DetailFieldRenderer } from "./DetailFieldRenderer";
 export { applyDisplayFormat } from "./utils";
 export { JsonField } from "./renderers/JsonField";
+export { MultiEnumField } from "./renderers/MultiEnumField";
 export { CurrencyField, formatCurrency } from "./renderers/CurrencyField";

react-openapi/src/components/fields/renderers/MultiEnumField.tsx

@@ -0,0 +1,59 @@
+import React from "react";
+import { Autocomplete, TextField, Chip, Box } from "@mui/material";
+import DoneIcon from "@mui/icons-material/Done";
+import type { FieldConfig } from "../../../types";
+
+interface Props {
+  field: FieldConfig;
+  value: any;
+  onChange: (value: any[]) => void;
+  error?: string;
+}
+
+export function MultiEnumField({ field, value, onChange, error }: Props) {
+  const selected: string[] = Array.isArray(value) ? value : [];
+
+  return (
+    <Autocomplete
+      multiple
+      disableCloseOnSelect
+      size="small"
+      options={field.enumValues ?? []}
+      value={selected}
+      onChange={(_, newVal) => onChange(newVal)}
+      renderOption={(props, option, { selected: isSelected }) => {
+        const { key, ...rest } = props as any;
+        return (
+          <li key={key} {...rest}>
+            {isSelected ? (
+              <DoneIcon sx={{ fontSize: 14, mr: 1, color: "primary.main" }} />
+            ) : (
+              <Box sx={{ width: 22, mr: 1 }} />
+            )}
+            {option}
+          </li>
+        );
+      }}
+      renderTags={(tagValue, getTagProps) =>
+        tagValue.map((tag, index) => {
+          const { key, ...tagProps } = getTagProps({ index });
+          return <Chip key={key} {...tagProps} label={tag} size="small" />;
+        })
+      }
+      renderInput={(params) => (
+        <TextField
+          {...params}
+          label={field.label}
+          placeholder={field.description || undefined}
+          error={!!error}
+          helperText={error || field.description || undefined}
+          size="small"
+        />
+      )}
+      sx={{
+        "& .MuiAutocomplete-popupIndicator, & .MuiAutocomplete-clearIndicator": { width: 20, height: 20, fontSize: 16 },
+      }}
+      disabled={field.readOnly}
+    />
+  );
+}