⚡ Bolt: Optimize date parsing in virtualized event list

.Jules/palette.md

@@ -0,0 +1,3 @@
+## 2024-06-22 - Overview Stats 토글 버튼 키보드 접근성 개선
+**Learning:** `overview-stats` 컴포넌트의 설명 텍스트를 펼치거나 접는 `<button>` 요소에 키보드 포커스 스타일이 누락되어 있어, 키보드 내비게이션 사용자에게 현재 포커스 위치를 명확히 보여주지 못했습니다. `hover` 스타일은 있었으나 `focus-visible` 처리가 없어 접근성 결함이 있었습니다.
+**Action:** Tailwind CSS의 `focus-visible` 관련 유틸리티 클래스(`focus-visible:outline-none`, `focus-visible:ring-2`, `focus-visible:ring-ring`, `rounded-sm`)를 추가하여 탭(Tab) 키 이동 시 포커스 링이 보이도록 수정했습니다. 앞으로 대화형 컴포넌트를 설계할 때는 항상 키보드 접근성(focus states)을 염두에 두고 작업해야 합니다.

CHANGELOG.md

@@ -0,0 +1,7 @@
+# Changelog
+
+## [Unreleased]
+
+### 🎨 변경 사항 (UX / 접근성)
+
+- 웹 대시보드의 각종 로그아웃 버튼(`org-sidebar.tsx`, `org-header.tsx`, `no-organization-state.tsx`)에 스크린 리더용 `aria-label="Log out of your account"` (또는 `Sign out of your account`) 속성을 추가하여 접근성을 개선했습니다.

packages/web/src/app/dashboard/[orgSlug]/sessions/[sessionId]/page.tsx

@@ -13,7 +13,7 @@ import {
   SessionFilesTab,
 } from '@/components/dashboard/session-files'
 import { useSessionDetail } from '@/hooks/use-dashboard-sessions'
-import { messagesToTimeline, formatSlashCommandText } from '@/lib/timeline-events'
+import { messagesToTimeline, buildTimelineGroups, formatSlashCommandText } from '@/lib/timeline-events'
 import { extractSessionFiles } from '@/lib/session-files'
 import {
   formatTokens,
@@ -46,6 +46,7 @@ export default function OrgSessionDetailPage({
     () => (data ? messagesToTimeline(data.messages) : []),
     [data],
   )
+  const groups = useMemo(() => buildTimelineGroups(events), [events])
   const files = useMemo(() => extractSessionFiles(events), [events])
   const [selectedIdx, setSelectedIdx] = useState<number | null>(0)
   const safeIdx =
@@ -221,6 +222,7 @@ export default function OrgSessionDetailPage({
             <div className="px-4 pt-3 pb-2">
               <SessionActivityRibbon
                 events={events}
+                groups={groups}
                 selectedIdx={safeIdx}
                 onSelect={setSelectedIdx}
                 sessionStartedAt={data.startedAt}
@@ -232,6 +234,7 @@ export default function OrgSessionDetailPage({
               <div className="border-r border-border min-h-0 overflow-hidden">
                 <EventList
                   events={events}
+                  groups={groups}
                   selectedIdx={safeIdx ?? -1}
                   onSelect={setSelectedIdx}
                   sessionStartedAt={data.startedAt}

packages/web/src/components/dashboard/event-list.tsx

@@ -3,13 +3,14 @@ import { List, type RowComponentProps } from "react-window";
 import { User, Bot, Wrench, ChevronRight } from "lucide-react";
 import {
   formatSlashCommandText,
-  buildTimelineGroups,
   type TimelineEvent,
+  type TimelineGroup,
 } from "@/lib/timeline-events";
 import { cn } from "@/lib/utils";
 
 type EventListProps = {
   events: TimelineEvent[];
+  groups: TimelineGroup[];
   selectedIdx: number;
   onSelect: (idx: number) => void;
   sessionStartedAt: string;
@@ -22,6 +23,7 @@ type FlatRow =
       kind: "event";
       key: string;
       event: TimelineEvent;
+      timestampMs: number;
       idx: number;
       indented: boolean;
       labelOverride?: string;
@@ -32,36 +34,41 @@ type FlatRow =
       toolName: string;
       count: number;
       firstEvent: TimelineEvent;
+      timestampMs: number;
       groupFirstIdx: number;
       isExpanded: boolean;
     };
 
 const ROW_HEIGHT = 36;
 
-function formatElapsed(timestamp: string, sessionStartedAt: string): string {
-  const t = new Date(timestamp).getTime();
-  const start = new Date(sessionStartedAt).getTime();
-  if (Number.isNaN(t) || Number.isNaN(start)) return "";
-  const diffSec = Math.max(0, Math.floor((t - start) / 1000));
+function formatElapsedMs(
+  timestampMs: number,
+  sessionStartedAtMs: number,
+): string {
+  if (Number.isNaN(timestampMs) || Number.isNaN(sessionStartedAtMs)) return "";
+  const diffSec = Math.max(
+    0,
+    Math.floor((timestampMs - sessionStartedAtMs) / 1000),
+  );
   const h = Math.floor(diffSec / 3600);
   const m = Math.floor((diffSec % 3600) / 60);
   const s = diffSec % 60;
   return `${h}:${String(m).padStart(2, "0")}:${String(s).padStart(2, "0")}`;
 }
 
 function buildFlatRows(
-  events: TimelineEvent[],
+  groups: TimelineGroup[],
   expandedGroups: Set<number>,
   selectedIdx: number,
 ): FlatRow[] {
-  const groups = buildTimelineGroups(events);
   const rows: FlatRow[] = [];
   for (const group of groups) {
     if (group.kind === "single") {
       rows.push({
         kind: "event",
         key: `s-${group.idx}`,
         event: group.event,
+        timestampMs: new Date(group.event.timestamp).getTime(),
         idx: group.idx,
         indented: false,
       });
@@ -73,6 +80,7 @@ function buildFlatRows(
         kind: "event",
         key: `gs-${idx}`,
         event,
+        timestampMs: new Date(event.timestamp).getTime(),
         idx,
         indented: false,
         labelOverride: "Tool",
@@ -89,6 +97,7 @@ function buildFlatRows(
       toolName: group.toolName,
       count: group.items.length,
       firstEvent: group.items[0].event,
+      timestampMs: new Date(group.items[0].event.timestamp).getTime(),
       groupFirstIdx: firstIdx,
       isExpanded,
     });
@@ -98,6 +107,7 @@ function buildFlatRows(
           kind: "event",
           key: `gc-${idx}`,
           event,
+          timestampMs: new Date(event.timestamp).getTime(),
           idx,
           indented: true,
           labelOverride: "Tool",
@@ -123,7 +133,8 @@ function getSinglePreview(event: TimelineEvent): string {
     return normalized.slice(0, 80);
   }
   if (event.isSkillCall && event.skillName) return `Skill: ${event.skillName}`;
-  if (event.isAgentCall && event.agentType) return `Subagent: ${event.agentType}`;
+  if (event.isAgentCall && event.agentType)
+    return `Subagent: ${event.agentType}`;
   return event.toolName;
 }
 
@@ -204,7 +215,7 @@ function RowView({
 type RowProps = {
   rows: FlatRow[];
   selectedIdx: number;
-  sessionStartedAt: string;
+  sessionStartedAtMs: number;
   onSelect: (idx: number) => void;
   onToggleGroup: (firstIdx: number) => void;
 };
@@ -214,7 +225,7 @@ function Row({
   style,
   rows,
   selectedIdx,
-  sessionStartedAt,
+  sessionStartedAtMs,
   onSelect,
   onToggleGroup,
 }: RowComponentProps<RowProps>) {
@@ -227,7 +238,7 @@ function Row({
         <RowView
           label="Tool"
           preview={`${row.toolName} x${row.count}`}
-          time={formatElapsed(row.firstEvent.timestamp, sessionStartedAt)}
+          time={formatElapsedMs(row.timestampMs, sessionStartedAtMs)}
           icon={getIcon(row.firstEvent)}
           isSelected={false}
           onClick={() => onToggleGroup(row.groupFirstIdx)}
@@ -238,18 +249,19 @@ function Row({
   }
 
   const label = row.labelOverride ?? getSingleLabel(row.event);
-  const preview = row.labelOverride === "Tool"
-    ? row.event.kind === "tool"
-      ? row.event.toolName
-      : getSinglePreview(row.event)
-    : getSinglePreview(row.event);
+  const preview =
+    row.labelOverride === "Tool"
+      ? row.event.kind === "tool"
+        ? row.event.toolName
+        : getSinglePreview(row.event)
+      : getSinglePreview(row.event);
 
   return (
     <div style={style} role="listitem">
       <RowView
         label={label}
         preview={preview}
-        time={formatElapsed(row.event.timestamp, sessionStartedAt)}
+        time={formatElapsedMs(row.timestampMs, sessionStartedAtMs)}
         icon={getIcon(row.event)}
         isSelected={row.idx === selectedIdx}
         onClick={() => onSelect(row.idx)}
@@ -261,15 +273,21 @@ function Row({
 
 export function EventList({
   events,
+  groups,
   selectedIdx,
   onSelect,
   sessionStartedAt,
   expandedGroups,
   onToggleGroup,
 }: EventListProps) {
+  const sessionStartedAtMs = useMemo(
+    () => new Date(sessionStartedAt).getTime(),
+    [sessionStartedAt],
+  );
+
   const rows = useMemo(
-    () => buildFlatRows(events, expandedGroups, selectedIdx),
-    [events, expandedGroups, selectedIdx],
+    () => buildFlatRows(groups, expandedGroups, selectedIdx),
+    [groups, expandedGroups, selectedIdx],
   );
 
   if (events.length === 0) {
@@ -288,7 +306,7 @@ export function EventList({
       rowProps={{
         rows,
         selectedIdx,
-        sessionStartedAt,
+        sessionStartedAtMs,
         onSelect,
         onToggleGroup,
       }}

packages/web/src/components/dashboard/no-organization-state.tsx

@@ -37,6 +37,7 @@ export function NoOrganizationState({
             <button
               onClick={() => signOut({ callbackUrl: '/login' })}
               className="text-sm text-destructive hover:underline"
+              aria-label="Log out of your account"
             >
               Log out
             </button>

packages/web/src/components/dashboard/overview-stats.tsx

@@ -88,7 +88,7 @@ export function OverviewStats({
         id="overview-stats-explanation-toggle"
         aria-expanded={expanded}
         aria-controls="overview-stats-explanation"
-        className="mt-4 flex items-center gap-2 text-xs text-muted-foreground hover:text-foreground transition-colors"
+        className="mt-4 flex items-center gap-2 text-xs text-muted-foreground hover:text-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring transition-colors rounded-sm"
       >
         <span
           aria-hidden="true"

packages/web/src/components/dashboard/reports/weekly-flow-chart.tsx

@@ -12,6 +12,7 @@ import {
   Legend,
   type TooltipProps,
 } from 'recharts'
+import { useMemo } from 'react'
 import { parseISO } from 'date-fns'
 import { formatTokens } from '@/lib/format'
 import type { DailySeriesPoint } from '@/types/reports'
@@ -57,18 +58,22 @@ function sumTokens(p: DailySeriesPoint): number {
 }
 
 export function WeeklyFlowChart({ thisWeek, prevWeek }: WeeklyFlowChartProps) {
-  // 요일 기준으로 병합 (월~일 7개 슬롯)
-  const dayNames = ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
-  const data: ChartRow[] = dayNames.map((day) => ({ day, thisWeekTokens: 0, prevWeekTokens: 0 }))
+  const data = useMemo(() => {
+    // 요일 기준으로 병합 (월~일 7개 슬롯)
+    const dayNames = ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
+    const result: ChartRow[] = dayNames.map((day) => ({ day, thisWeekTokens: 0, prevWeekTokens: 0 }))
 
-  for (const p of thisWeek) {
-    const idx = dayIndex(p.date)
-    if (idx >= 0) data[idx].thisWeekTokens += sumTokens(p)
-  }
-  for (const p of prevWeek) {
-    const idx = dayIndex(p.date)
-    if (idx >= 0) data[idx].prevWeekTokens += sumTokens(p)
-  }
+    for (const p of thisWeek) {
+      const idx = dayIndex(p.date)
+      if (idx >= 0) result[idx].thisWeekTokens += sumTokens(p)
+    }
+    for (const p of prevWeek) {
+      const idx = dayIndex(p.date)
+      if (idx >= 0) result[idx].prevWeekTokens += sumTokens(p)
+    }
+
+    return result
+  }, [thisWeek, prevWeek])
 
   return (
     <ResponsiveContainer width="100%" height={260}>

packages/web/src/components/dashboard/session-activity-ribbon.tsx

@@ -1,16 +1,17 @@
 'use client'
 
-import { useMemo, useState, useRef } from 'react'
+import { useState, useRef } from 'react'
 import {
   formatSlashCommandText,
-  buildTimelineGroups,
   type TimelineEvent,
+  type TimelineGroup,
 } from '@/lib/timeline-events'
 import { formatTokens, formatCost, formatRelativeTime } from '@/lib/format'
 import { segmentVisuals } from './session-ribbon-visuals'
 
 type Props = {
   events: TimelineEvent[]
+  groups: TimelineGroup[]
   selectedIdx: number | null
   onSelect: (idx: number) => void
   sessionStartedAt: string
@@ -147,6 +148,7 @@ function MergedTooltipBody({
 
 export function SessionActivityRibbon({
   events,
+  groups,
   selectedIdx,
   onSelect,
   sessionStartedAt,
@@ -156,8 +158,6 @@ export function SessionActivityRibbon({
   const [hover, setHover] = useState<HoverState | null>(null)
   const containerRef = useRef<HTMLDivElement>(null)
 
-  const groups = useMemo(() => buildTimelineGroups(events), [events])
-
   if (events.length === 0) return null
 
   const trackMouse = (e: React.MouseEvent) => {

packages/web/src/components/dashboard/token-usage-chart.tsx

@@ -1,5 +1,6 @@
 'use client'
 
+import { useMemo } from 'react'
 import { AreaChart, Area, XAxis, YAxis, CartesianGrid, Tooltip, ResponsiveContainer, TooltipProps } from 'recharts'
 import { formatTokens, formatCost } from '@/lib/format'
 import type { UsageSeries } from '@argos/shared'
@@ -43,15 +44,17 @@ function CustomTooltip({ active, payload, label }: TooltipProps<number, string>)
 }
 
 export function TokenUsageChart({ data }: TokenUsageChartProps) {
-  const chartData = data.map(d => {
-    const date = new Date(d.date)
-    return {
-      date: format(date, 'MMM d'),
-      fullDate: format(date, 'MMM d, yyyy'),
-      input: d.inputTokens,
-      output: d.outputTokens,
-    }
-  })
+  const chartData = useMemo(() => {
+    return data.map(d => {
+      const date = new Date(d.date)
+      return {
+        date: format(date, 'MMM d'),
+        fullDate: format(date, 'MMM d, yyyy'),
+        input: d.inputTokens,
+        output: d.outputTokens,
+      }
+    })
+  }, [data])
 
   return (
     <ResponsiveContainer width="100%" height={300}>

packages/web/src/components/layout/org-header.tsx

@@ -18,6 +18,7 @@ export function OrgHeader({ orgName }: { orgName?: string }) {
           <Button
             variant="outline"
             onClick={() => signOut({ callbackUrl: '/login' })}
+            aria-label="Sign out of your account"
           >
             Sign out
           </Button>

packages/web/src/components/layout/org-sidebar.tsx

@@ -124,6 +124,7 @@ export function OrgSidebar() {
           <button
             onClick={handleLogout}
             className="w-full px-3 py-2 text-sm font-medium text-destructive hover:bg-destructive/10 rounded-md transition-colors"
+            aria-label="Log out of your account"
           >
             Log Out
           </button>
@@ -150,6 +151,7 @@ export function OrgSidebar() {
           <button
             onClick={handleLogout}
             className="px-3 py-1 text-sm text-destructive hover:bg-destructive/10 rounded-md transition-colors"
+            aria-label="Log out of your account"
           >
             Logout
           </button>