feat(editor): + Экспорт button в InfoPanel per redesign dark theme screenshot

User dropped /Users/zimin/Downloads/Ordinis (3) — full project dump.
Dark theme editor screenshot (uploads/draw-4b771386...png) показывает
INFO PANEL c двумя buttons:
  - ↓ Экспорт…
  - ⟲ Time-travel…

У нас был Time-travel + AOI — добавил Экспорт как third button.

Implementation:
  - EditorInfoPanel.actions.onExport + exportPending props
  - DownloadSimpleIcon кнопка 'Экспорт…'
  - Wired к useBulkExportRecords mutation:
    * Selection не empty -> export selected
    * Selection empty -> export all filtered records
  - disabled когда mutation pending, label 'Экспорт…'

Project dump reviewed:
  - design_handoff_dictionary_catalog — старый handoff, всё уже реализовано
    (List view MR !62, Hub MR earlier, Graph earlier)
  - patches/ — @nstart/ui patches, moot (мы dropped @nstart/ui MR !52)
  - redesign/ — уже синхронизированы colors MR !71, layout MR !69
  - uploads/ — user-provided screenshots, main delta = Export button

ordinis-admin-ui/src/components/editor/EditorInfoPanel.tsx

@@ -1,7 +1,7 @@
 import { useMemo } from 'react'
 import { Link } from '@tanstack/react-router'
 import { useTranslation } from 'react-i18next'
-import { ClockCounterClockwiseIcon, MapTrifoldIcon } from '@phosphor-icons/react'
+import { ClockCounterClockwiseIcon, MapTrifoldIcon, DownloadSimpleIcon } from '@phosphor-icons/react'
 import { Badge } from '@/ui'
 import { useDictionaryDependents } from '@/api/queries'
 import type { DictionaryDetail } from '@/api/client'
@@ -25,13 +25,15 @@ import { cn } from '@/lib/utils'
 export type EditorInfoPanelProps = {
   detail: DictionaryDetail
   recordCount: number
-  /** Optional action buttons (Time-travel / AOI filter) — bottom of panel
+  /** Optional action buttons (Time-travel / AOI / Export) — bottom of panel
    * per redesign prototype. Toggle handlers come from route's state. */
   actions?: {
     onTimeTravel?: () => void
     timeTravelActive?: boolean
     onAoi?: () => void
     aoiActive?: boolean
+    onExport?: () => void
+    exportPending?: boolean
   }
 }
 
@@ -109,6 +111,19 @@ export function EditorInfoPanel({ detail, recordCount, actions }: EditorInfoPane
               {t('aoi.button', { defaultValue: 'AOI фильтр…' })}
             </button>
           )}
+          {actions.onExport && (
+            <button
+              type="button"
+              onClick={actions.onExport}
+              disabled={actions.exportPending}
+              className="w-full h-8 rounded-md border border-line bg-surface text-ink-2 hover:border-line-2 hover:bg-surface-2 disabled:opacity-50 disabled:cursor-not-allowed text-cell flex items-center justify-center gap-1.5 transition-colors"
+            >
+              <DownloadSimpleIcon weight="regular" size={14} />
+              {actions.exportPending
+                ? t('export.pending', { defaultValue: 'Экспорт…' })
+                : t('export.button', { defaultValue: '↓ Экспорт…' })}
+            </button>
+          )}
         </div>
       )}