fix(02): remove custom ViewToolbar; use Schedule-X built-in header

- Remove <ViewToolbar> render and its import from CalendarShell
- Remove createCalendarControlsPlugin import, useState instance, and plugin
  array entry (calendar-controls only served the custom toolbar)
- Delete ViewToolbar.tsx (no longer referenced anywhere)
- Remove calendar-controls mock from CalendarShell.test.tsx
- CSS audit confirmed no rules hide Schedule-X weekday-name row; no CSS changes needed
- All four views (day/week/month-grid/month-agenda) remain; Schedule-X's native
  header exposes them in its own view switcher

apps/pwa/src/components/CalendarShell.test.tsx

@@ -56,41 +56,6 @@ vi.mock('@schedule-x/event-modal', () => ({
   })),
 }))
 
-// Mock @schedule-x/calendar-controls so CalendarShell can create the plugin
-vi.mock('@schedule-x/calendar-controls', () => ({
-  createCalendarControlsPlugin: vi.fn(() => ({
-    name: 'calendarControls',
-    beforeRender: vi.fn(),
-    onRender: vi.fn(),
-    setDate: vi.fn(),
-    setView: vi.fn(),
-    getDate: vi.fn(() => Temporal.Now.plainDateISO()),
-    getView: vi.fn(() => 'month-grid'),
-    setFirstDayOfWeek: vi.fn(),
-    setLocale: vi.fn(),
-    setViews: vi.fn(),
-    setDayBoundaries: vi.fn(),
-    setWeekOptions: vi.fn(),
-    setCalendars: vi.fn(),
-    setMinDate: vi.fn(),
-    setMaxDate: vi.fn(),
-    setMonthGridOptions: vi.fn(),
-    setTimezone: vi.fn(),
-    setResources: vi.fn(),
-    getFirstDayOfWeek: vi.fn(),
-    getLocale: vi.fn(),
-    getViews: vi.fn(() => []),
-    getDayBoundaries: vi.fn(),
-    getWeekOptions: vi.fn(),
-    getCalendars: vi.fn(() => ({})),
-    getMinDate: vi.fn(),
-    getMaxDate: vi.fn(),
-    getMonthGridOptions: vi.fn(),
-    getResources: vi.fn(() => []),
-    getRange: vi.fn(() => null),
-  })),
-}))
-
 // Mock the API client
 vi.mock('../api/client.js', () => ({
   fetchMe: vi.fn(),

apps/pwa/src/components/CalendarShell.tsx

@@ -14,10 +14,12 @@
  *   - Event popover: driven exclusively by Zustand openEventId via onEventClick → standalone
  *     EventDetailPopover; createEventModalPlugin and customComponents.eventModal are NOT used
  *   - Threat T-02d-01: all event fields are plain-text JSX children — no raw HTML injection
+ *   - Navigation: Schedule-X's built-in header is the sole navigation bar (Today/‹›/view switcher
+ *     + weekday-name row). The custom ViewToolbar and calendar-controls plugin have been removed.
  *
  * Layout:
- *   - Phone (≤767px): AppNav top bar → ViewToolbar → calendar grid (primary focal point)
+ *   - Phone (≤767px): AppNav top bar → Schedule-X (header + grid)
- *   - Tablet/Desktop (≥768px): AppNav left sidebar (240px) + main area (ViewToolbar + grid)
+ *   - Tablet/Desktop (≥768px): AppNav left sidebar (240px) + main area (Schedule-X header + grid)
  *
  * State branches:
  *   isLoading (initial) → SkeletonCalendar
@@ -37,7 +39,6 @@ import {
   type CalendarType,
 } from '@schedule-x/calendar'
 import { createEventsServicePlugin } from '@schedule-x/events-service'
-import { createCalendarControlsPlugin } from '@schedule-x/calendar-controls'
 
 import { fetchMe, fetchEvents } from '../api/client.js'
 import { hydrateEvents } from '../lib/hydrateEvents.js'
@@ -45,7 +46,6 @@ import { buildCalendarConfig, SX_FIRST_DAY_OF_WEEK } from '../lib/calendarConfig
 import { useCalendarStore } from '../store/calendarStore.js'
 import { EventDetailPopover } from './EventDetailPopover.js'
 import { AppNav } from './AppNav.js'
-import { ViewToolbar } from './ViewToolbar.js'
 import { ColorLegend } from './ColorLegend.js'
 import { SkeletonCalendar } from './SkeletonCalendar.js'
 import { EmptyState } from './EmptyState.js'
@@ -96,7 +96,6 @@ export function CalendarShell() {
 
   // Create plugins once (stable across renders)
   const eventsService = useState(() => createEventsServicePlugin())[0]
-  const calendarControls = useState(() => createCalendarControlsPlugin())[0]
 
   // Build members list from /api/me for AppNav + ColorLegend
   const members = useMemo(() => {
@@ -148,7 +147,7 @@ export function CalendarShell() {
         },
       },
     },
-    [eventsService, calendarControls],
+    [eventsService],
   )
 
   // Sync TanStack Query result into Schedule-X eventsService (Pitfall 4 guard)
@@ -205,9 +204,6 @@ export function CalendarShell() {
           overflow: 'hidden',
         }}
       >
-        {/* ViewToolbar */}
-        <ViewToolbar controls={calendarControls} />
-
         {/* Main calendar area */}
         <div style={{ flex: 1, minHeight: 0, position: 'relative', overflow: 'hidden' }}>
           {isInitialLoading ? (

apps/pwa/src/components/ViewToolbar.tsx

@@ -1,192 +0,0 @@
-/**
- * ViewToolbar — calendar navigation and view switcher.
- *
- * UI-SPEC §ViewToolbar:
- *   - Buttons: Today | < | > | [Day] [Week] [Month] [Agenda]
- *   - Font: 13px label weight
- *   - Active view: subtle surface tint (NOT accent) — --color-member-0 at 12% opacity
- *   - Touch targets: 44px minimum height
- *   - role="button", keyboard-activatable with Enter/Space
- *
- * Reviewer note: ViewToolbar is secondary chrome — accent colors NOT on chrome.
- * Active state uses a subtle surface tint, not the accent color directly.
- *
- * Schedule-X integration: navigation and view-switching via the official
- * @schedule-x/calendar-controls plugin (createCalendarControlsPlugin).
- * The plugin is created once in CalendarShell and passed down as `controls`.
- *
- * Zustand subscription: uses per-field selectors so ViewToolbar only re-renders
- * when selectedView or setSelectedView change — NOT when openEventId changes.
- */
-
-import { useCalendarStore } from '../store/calendarStore.js'
-import type { createCalendarControlsPlugin } from '@schedule-x/calendar-controls'
-
-type ViewId = 'day' | 'week' | 'month-grid' | 'month-agenda'
-
-interface ViewConfig {
-  id: ViewId
-  label: string
-}
-
-const VIEWS: ViewConfig[] = [
-  { id: 'day', label: 'Day' },
-  { id: 'week', label: 'Week' },
-  { id: 'month-grid', label: 'Month' },
-  { id: 'month-agenda', label: 'Agenda' },
-]
-
-type CalendarControlsPlugin = ReturnType<typeof createCalendarControlsPlugin>
-
-interface ViewToolbarProps {
-  controls: CalendarControlsPlugin | null
-}
-
-export function ViewToolbar({ controls }: ViewToolbarProps) {
-  // Per-field selectors: do NOT subscribe to openEventId.
-  // If the whole store is destructured unselected, every popover open/close
-  // causes a re-render here, which flashes the toolbar (Bug B).
-  const selectedView = useCalendarStore((s) => s.selectedView)
-  const setSelectedView = useCalendarStore((s) => s.setSelectedView)
-
-  /**
-   * Navigate using the calendar-controls plugin API.
-   * - today: setDate(Temporal.Now.plainDateISO())
-   * - prev/next: read current date, step by the active view's unit, call setDate()
-   *
-   * Step mapping (matches Schedule-X built-in backward/forward behaviour):
-   *   day         → ±1 day
-   *   week        → ±1 week
-   *   month-grid  → ±1 month
-   *   month-agenda → ±1 month
-   */
-  const navigate = (direction: 'prev' | 'next' | 'today') => {
-    if (!controls) return
-
-    if (direction === 'today') {
-      controls.setDate(Temporal.Now.plainDateISO())
-      return
-    }
-
-    // Get the current date from the controls plugin (returns Temporal.PlainDate)
-    const current = controls.getDate()
-
-    let step: Temporal.DurationLike
-    if (selectedView === 'day') {
-      step = { days: 1 }
-    } else if (selectedView === 'week') {
-      step = { weeks: 1 }
-    } else {
-      // month-grid or month-agenda
-      step = { months: 1 }
-    }
-
-    const newDate = direction === 'prev' ? current.subtract(step) : current.add(step)
-    controls.setDate(newDate)
-  }
-
-  const switchView = (viewId: ViewId) => {
-    if (!controls) return
-    controls.setView(viewId)
-    setSelectedView(viewId)
-  }
-
-  const buttonBase: React.CSSProperties = {
-    background: 'none',
-    border: '1px solid var(--color-border)',
-    cursor: 'pointer',
-    minHeight: '44px',
-    padding: '0 var(--space-3)',
-    fontSize: 'var(--text-label-size)',
-    fontWeight: 'var(--text-label-weight)',
-    lineHeight: 'var(--text-label-line-height)',
-    color: 'var(--color-text-primary)',
-    borderRadius: 'var(--space-1)',
-    fontFamily: 'var(--font-family-base)',
-    display: 'flex',
-    alignItems: 'center',
-    justifyContent: 'center',
-    transition: 'background 0.1s',
-  }
-
-  const activeButtonStyle: React.CSSProperties = {
-    ...buttonBase,
-    // Subtle surface tint — NOT accent color (UI-SPEC 60/30/10 rule)
-    // Active state: --color-member-0 at 12% opacity over white
-    background: 'rgba(74, 144, 217, 0.12)',
-    fontWeight: 600,
-    border: '1px solid rgba(74, 144, 217, 0.3)',
-  }
-
-  return (
-    <div
-      style={{
-        display: 'flex',
-        alignItems: 'center',
-        gap: 'var(--space-2)',
-        padding: 'var(--space-2) var(--space-4)',
-        borderBottom: '1px solid var(--color-border)',
-        background: 'var(--color-surface)',
-        flexWrap: 'wrap',
-        fontFamily: 'var(--font-family-base)',
-        minHeight: '48px',
-      }}
-      role="toolbar"
-      aria-label="Calendar navigation"
-    >
-      {/* Today button */}
-      <button
-        role="button"
-        onClick={() => navigate('today')}
-        style={buttonBase}
-        aria-label="Go to today"
-      >
-        Today
-      </button>
-
-      {/* Prev / Next */}
-      <button
-        role="button"
-        onClick={() => navigate('prev')}
-        style={{ ...buttonBase, minWidth: '44px' }}
-        aria-label="Previous period"
-      >
-        ‹
-      </button>
-      <button
-        role="button"
-        onClick={() => navigate('next')}
-        style={{ ...buttonBase, minWidth: '44px' }}
-        aria-label="Next period"
-      >
-        ›
-      </button>
-
-      {/* Spacer */}
-      <div style={{ flex: 1 }} />
-
-      {/* View switcher */}
-      <div
-        style={{
-          display: 'flex',
-          gap: 'var(--space-1)',
-        }}
-        role="group"
-        aria-label="View selector"
-      >
-        {VIEWS.map((view) => (
-          <button
-            key={view.id}
-            role="button"
-            onClick={() => switchView(view.id)}
-            style={selectedView === view.id ? activeButtonStyle : buttonBase}
-            aria-pressed={selectedView === view.id}
-            aria-label={`Switch to ${view.label} view`}
-          >
-            {view.label}
-          </button>
-        ))}
-      </div>
-    </div>
-  )
-}