expense list: replace accordion with flat Stripe-style rows

- drop the per-row accordion and delete ExpenseDetail (was only used
  for the expanded view); rows are now static bordered cards with a
  hover highlight
- row layout: logo | name/date + account chip | amount
- tag chips were added to the row during iteration but removed for
  now until a better placement is settled

src/Expense/ExpenseDetail.tsx

@@ -1,24 +0,0 @@
-import React from "react";
-import { Box, Divider } from "@mui/material";
-import { DetailFieldRenderer } from "../../react-openapi";
-import type { ExpenseItem, ExpenseFieldConfigs } from "./types";
-
-interface ExpenseDetailProps {
-  item: ExpenseItem;
-  fields: ExpenseFieldConfigs;
-}
-
-export function ExpenseDetail({ item, fields }: ExpenseDetailProps) {
-  return (
-    <Box sx={{ pt: 1, pb: 0.5 }}>
-      <Divider sx={{ mb: 1.5 }} />
-      <Box sx={{ display: "flex", flexDirection: "column", gap: 0.5 }}>
-        <DetailFieldRenderer field={fields.entity} value={item.entity} displayFormat={fields.formats.entity} />
-        <DetailFieldRenderer field={fields.amount} value={item.amount} />
-        <DetailFieldRenderer field={fields.account} value={item.account} displayFormat={fields.formats.account} />
-        <DetailFieldRenderer field={fields.tags} value={item.tags} displayFormat={fields.formats.tags} />
-        <DetailFieldRenderer field={fields.occurredAt} value={item.occurred_at} />
-      </Box>
-    </Box>
-  );
-}

src/Expense/ExpenseList.tsx

@@ -1,18 +1,10 @@
 import React, { useCallback, useEffect, useMemo, useRef, useState } from "react";
-import {
-  Box,
-  Typography,
-  Accordion,
-  AccordionSummary,
-  AccordionDetails,
-} from "@mui/material";
+import { Box, Typography } from "@mui/material";
 import { alpha } from "@mui/material/styles";
-import ExpandMoreIcon from "@mui/icons-material/ExpandMore";
 import KeyboardArrowUpIcon from "@mui/icons-material/KeyboardArrowUp";
 import { ListCellRenderer, CurrencyField, applyDisplayFormat, formatCurrency } from "../../react-openapi";
 import type { ExpenseItem, ExpenseFieldConfigs } from "./types";
 import { isExpense, monthKey, monthLabel, parseOccurredAt } from "./types";
-import { ExpenseDetail } from "./ExpenseDetail";
 
 interface GroupedMonth {
   key: string;
@@ -43,86 +35,74 @@ function groupByMonth(items: ExpenseItem[]): GroupedMonth[] {
     .sort((a, b) => b.key.localeCompare(a.key));
 }
 
-interface ExpenseCardProps {
+interface ExpenseRowProps {
   item: ExpenseItem;
-  expanded: boolean;
   currency: string;
   fields: ExpenseFieldConfigs;
-  onToggle: (id: string) => void;
 }
 
-const ExpenseCard = React.memo(function ExpenseCard({ item, expanded, currency, fields, onToggle }: ExpenseCardProps) {
+const ExpenseRow = React.memo(function ExpenseRow({ item, currency, fields }: ExpenseRowProps) {
   const itemCurrency = item.account?.currency ?? currency;
 
   return (
-    <Accordion
-      disableGutters
-      expanded={expanded}
-      onChange={(_, isExpanded) => onToggle(isExpanded ? item.id : "")}
-      TransitionProps={{ unmountOnExit: true }}
+    <Box
       sx={{
+        display: "flex",
+        alignItems: "center",
+        gap: 2,
+        px: 2,
+        py: 1.25,
         border: "1px solid",
-        borderColor: expanded ? "primary.main" : "divider",
+        borderColor: "divider",
         borderRadius: 2,
-        overflow: "hidden",
-        boxShadow: "none",
-        "&:before": { display: "none" },
-        transition: "border-color 160ms ease, background-color 160ms ease",
-        "&:hover": { borderColor: "primary.light" },
+        backgroundColor: "background.paper",
+        transition: "background-color 160ms ease, border-color 160ms ease",
+        "&:hover": {
+          backgroundColor: "action.hover",
+          borderColor: "primary.light",
+        },
       }}
     >
-      <AccordionSummary
-        expandIcon={<ExpandMoreIcon />}
+      <Box
         sx={{
-          "& .MuiAccordionSummary-content": {
-            alignItems: "center",
-            gap: 2,
-            minWidth: 0,
-            py: 0.5,
-          },
+          width: 40,
+          flexShrink: 0,
+          display: "flex",
+          alignItems: "center",
+          justifyContent: "center",
         }}
       >
-        <Box
-          sx={{
-            width: 40,
-            flexShrink: 0,
-            display: "flex",
-            alignItems: "center",
-            justifyContent: "center",
-          }}
+        {item.entity?.logo ? (
+          <ListCellRenderer field={fields.logo} value={item.entity.logo} />
+        ) : (
+          <Box sx={{ width: 40, height: 40, borderRadius: 2, bgcolor: "action.hover" }} />
+        )}
+      </Box>
+      <Box sx={{ flex: "0 1 auto", minWidth: 0 }}>
+        <Typography
+          variant="body1"
+          fontWeight={600}
+          noWrap
+          sx={{ fontSize: "0.9375rem", lineHeight: 1.3 }}
         >
-          {item.entity?.logo ? (
-            <ListCellRenderer field={fields.logo} value={item.entity.logo} />
-          ) : (
-            <Box sx={{ width: 40, height: 40, borderRadius: 2, bgcolor: "action.hover" }} />
+          {item.entity ? applyDisplayFormat(item.entity, fields.formats.entity) : "Unknown"}
+        </Typography>
+        <Box sx={{ display: "flex", alignItems: "center", gap: 1, flexWrap: "wrap" }}>
+          <Box sx={{ color: "text.secondary" }}>
+            <ListCellRenderer field={fields.occurredAt} value={item.occurred_at} />
+          </Box>
+          {item.account?.name && (
+            <ListCellRenderer
+              field={fields.account}
+              value={item.account}
+              displayFormat={fields.formats.account}
+            />
           )}
         </Box>
-        <Box sx={{ flex: 1, minWidth: 0 }}>
-          <Typography
-            variant="body1"
-            fontWeight={600}
-            noWrap
-            sx={{ fontSize: "0.9375rem", lineHeight: 1.3 }}
-          >
-            {item.entity ? applyDisplayFormat(item.entity, fields.formats.entity) : "Unknown"}
-          </Typography>
-          <Box sx={{ display: "flex", alignItems: "center", gap: 1, mt: 0.25, flexWrap: "wrap" }}>
-            <ListCellRenderer field={fields.occurredAt} value={item.occurred_at} />
-            {item.account?.name && (
-              <ListCellRenderer
-                field={fields.account}
-                value={item.account}
-                displayFormat={fields.formats.account}
-              />
-            )}
-          </Box>
-        </Box>
-        <CurrencyField value={item.amount} currency={itemCurrency} large />
-      </AccordionSummary>
-      <AccordionDetails sx={{ pt: 0 }}>
-        <ExpenseDetail item={item} fields={fields} />
-      </AccordionDetails>
-    </Accordion>
+      </Box>
+      <Box sx={{ flex: 1 }} />
+      <CurrencyField value={item.amount} currency={itemCurrency} large />
+    </Box>
   );
 });
 
@@ -132,13 +112,9 @@ interface ExpenseListProps {
 }
 
 export function ExpenseList({ items, fields }: ExpenseListProps) {
-  const [expandedId, setExpandedId] = useState<string | null>(null);
   const [activeMonth, setActiveMonth] = useState<string | null>(null);
   const groups = useMemo(() => groupByMonth(items), [items]);
   const listRef = useRef<HTMLDivElement>(null);
-  const handleToggle = useCallback((id: string) => {
-    setExpandedId((prev) => (prev === id ? null : id));
-  }, []);
 
   const jumpToActiveMonth = useCallback(() => {
     if (!activeMonth) return;
@@ -239,13 +215,11 @@ export function ExpenseList({ items, fields }: ExpenseListProps) {
 
           <Box sx={{ display: "flex", flexDirection: "column", gap: 1 }}>
             {group.items.map((item) => (
-              <ExpenseCard
+              <ExpenseRow
                 key={item.id}
                 item={item}
-                expanded={expandedId === item.id}
                 currency={group.currency}
                 fields={fields}
-                onToggle={handleToggle}
               />
             ))}
           </Box>