feat(admin-ui): editor 6-tab layout (Stage 3.4)

Dictionary editor route теперь имеет TabBar (handoff design Stage 3.4):
  Records | Relations | Fields | JSON | Events | History

URL-synced через ?tab= (default: records). Backward-compat: старый
?view=hub auto-remap'нется в ?tab=relations при mount'е.

Tab contents:
- records (default): существующий records table + filters + edit modal
  flow — без изменений, обёрнут в conditional render
- relations: DictionaryHubView (был раньше при view=hub)
- fields: schema properties summary — name/type/required/unique/i18n/FK/desc
- json: pretty-printed schemaJson read-only
- events: link к /audit с pre-filled dict filter
- history: placeholder (schema version timeline — backend endpoint pending)

EditorTabBar — inline component с handoff styling (border-b border-line +
active accent border + font-semibold), -mb-px overlap для clean look.

Hub view's neighbor cards теперь search={tab:'relations'} вместо
view='hub' (consistent с new param).

DictionaryDependentsPanel рендерится только в Records tab — auto Hub view
в Relations tab уже включает dependents через свой layout.

Tests: 116/116 PASS, build green, TS clean.

ordinis-admin-ui/src/components/lineage/DictionaryHubView.tsx

@@ -53,7 +53,7 @@ const NeighborCard = ({
   <Link
     to="/dictionaries/$name"
     params={{ name: dict.name }}
-    search={{ view: 'hub' }}
+    search={{ tab: 'relations' }}
     className={`group block bg-white border border-line rounded-lg p-3 transition hover:shadow-hover hover:border-accent/40 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-accent/40 ${
       side === 'left' ? 'text-right' : 'text-left'
     }`}

ordinis-admin-ui/src/routes/dictionaries.$name.tsx

@@ -60,9 +60,15 @@ type DictSearch = {
   /** Time-travel: ISO datetime "просмотр на момент X". Если задан — backend
    *  findActiveAt(at) возвращает active version на этот момент вместо now(). */
   at?: string
-  /** View mode: 'records' (default — table + filters) | 'hub' (relations graph
-   *  с current dict в центре + neighbors на боках). См. DictionaryHubView. */
-  view?: 'records' | 'hub'
+  /** Active editor tab (Stage 3.4 handoff design):
+   *  - records (default): table + filters + edit modal
+   *  - relations: dependents graph (incoming FK refs + outgoing schema FKs)
+   *  - fields: schema properties grid
+   *  - json: raw schema JSON viewer
+   *  - events: audit log filtered к этому dict
+   *  - history: timeline записей changes
+   *  Backward-compat: старый ?view=hub аутенитично remap'нется в ?tab=relations. */
+  tab?: 'records' | 'relations' | 'fields' | 'json' | 'events' | 'history'
 }
 
 const SCOPE_VALUES: ReadonlySet<DataScope> = new Set(['PUBLIC', 'INTERNAL', 'RESTRICTED'])
@@ -84,7 +90,15 @@ const validateSearch = (raw: Record<string, unknown>): DictSearch => {
   if (typeof raw.at === 'string' && !isNaN(Date.parse(raw.at))) {
     out.at = raw.at
   }
-  if (raw.view === 'hub' || raw.view === 'records') out.view = raw.view
+  // Tab param + backward-compat для старого ?view=hub.
+  const TABS: ReadonlySet<DictSearch['tab']> = new Set([
+    'records', 'relations', 'fields', 'json', 'events', 'history',
+  ])
+  if (typeof raw.tab === 'string' && TABS.has(raw.tab as DictSearch['tab'])) {
+    out.tab = raw.tab as DictSearch['tab']
+  } else if (raw.view === 'hub') {
+    out.tab = 'relations'
+  }
   return out
 }
 
@@ -566,47 +580,52 @@ function DictionaryDetail() {
         }
       />
 
-      {/* View toggle: Записи (default table-based view) | Связи (Hub view с
-          neighbors на боках). Per design handoff B. */}
+      {/* Editor tabs per handoff Stage 3.4:
+          Records | Relations | Fields | JSON | Events | History.
+          URL-synced через ?tab=. Default — records (records table + filters). */}
       {detailQuery.data && (
-        <div role="group" aria-label="View mode" className="flex border border-line rounded-sm overflow-hidden w-fit">
-          {(['records', 'hub'] as const).map((mode) => {
-            const active = (urlSearch.view ?? 'records') === mode
-            return (
-              <button
-                key={mode}
-                type="button"
-                onClick={() =>
-                  void navigate({
-                    search: (prev) => ({
-                      ...prev,
-                      view: mode === 'records' ? undefined : mode,
-                    }),
-                    replace: true,
-                  })
-                }
-                aria-pressed={active}
-                className={`px-3 py-1 text-2xs uppercase tracking-[0.10em] transition focus:outline-none focus:ring-2 focus:ring-accent/40 ${
-                  active
-                    ? 'bg-accent-bg text-accent'
-                    : 'hover:bg-accent-bg/20 text-ink'
-                }`}
-              >
-                {t(`dict.view.${mode}`, {
-                  defaultValue: mode === 'records' ? 'Записи' : 'Связи',
-                })}
-              </button>
-            )
-          })}
-        </div>
+        <EditorTabBar
+          active={urlSearch.tab ?? 'records'}
+          onChange={(tab) =>
+            void navigate({
+              search: (prev) => ({
+                ...prev,
+                tab: tab === 'records' ? undefined : tab,
+              }),
+              replace: true,
+            })
+          }
+        />
       )}
 
-      {urlSearch.view === 'hub' && detailQuery.data ? (
+      {/* Relations tab — incoming FK + outgoing schema FK. */}
+      {urlSearch.tab === 'relations' && detailQuery.data && (
         <DictionaryHubView detail={detailQuery.data} />
-      ) : (
-        /* Phase 1 dict-relationships-v2: schema-level reverse FK card.
-           Hide-on-empty — большинство справочников без incoming refs не
-           увидят этот блок. */
+      )}
+
+      {/* Fields tab — schema properties grid. */}
+      {urlSearch.tab === 'fields' && detailQuery.data && (
+        <FieldsTabContent detail={detailQuery.data} />
+      )}
+
+      {/* JSON tab — raw schema viewer (read-only). */}
+      {urlSearch.tab === 'json' && detailQuery.data && (
+        <JsonTabContent detail={detailQuery.data} />
+      )}
+
+      {/* Events tab — link to /audit с pre-filled dict filter. */}
+      {urlSearch.tab === 'events' && (
+        <EventsTabContent dictName={name} />
+      )}
+
+      {/* History tab — записи version timeline (стуб, Stage 3.x). */}
+      {urlSearch.tab === 'history' && (
+        <HistoryTabContent />
+      )}
+
+      {/* DictionaryDependentsPanel — отображается ТОЛЬКО на Records tab.
+          Phase 1 dict-relationships-v2 reverse FK card. Hide-on-empty. */}
+      {(!urlSearch.tab || urlSearch.tab === 'records') && (
         <DictionaryDependentsPanel dictionaryName={name} />
       )}
 
@@ -629,6 +648,10 @@ function DictionaryDetail() {
         </div>
       )}
 
+      {/* === Records tab content (default, also fallback if no ?tab) === */}
+      {(!urlSearch.tab || urlSearch.tab === 'records') && (
+      <>
+
       {/* Time-travel picker — раскрывается по клику на toolbar button.
           ISO datetime в URL ?at=… — share-friendly. Active state показывает
           ambient banner справа от input'а. Phase v1 stretch. */}
@@ -870,6 +893,10 @@ function DictionaryDetail() {
         </>
       )}
 
+      </>
+      )}
+      {/* === end records tab content === */}
+
       <Modal
         isOpen={edit.kind === 'create' || edit.kind === 'edit'}
         onClose={() => setEdit({ kind: 'closed' })}
@@ -1302,3 +1329,133 @@ const serverErrorMessage = (err: unknown): string | null => {
   }
   return err instanceof Error ? err.message : 'Unknown error'
 }
+
+// ===== Editor Tabs (Stage 3.4) =====
+
+type EditorTab = 'records' | 'relations' | 'fields' | 'json' | 'events' | 'history'
+
+function EditorTabBar({
+  active,
+  onChange,
+}: {
+  active: EditorTab
+  onChange: (tab: EditorTab) => void
+}) {
+  const { t } = useTranslation()
+  const tabs: { id: EditorTab; label: string }[] = [
+    { id: 'records', label: t('editor.tab.records', { defaultValue: 'Записи' }) },
+    { id: 'relations', label: t('editor.tab.relations', { defaultValue: 'Связи' }) },
+    { id: 'fields', label: t('editor.tab.fields', { defaultValue: 'Поля' }) },
+    { id: 'json', label: t('editor.tab.json', { defaultValue: 'JSON' }) },
+    { id: 'events', label: t('editor.tab.events', { defaultValue: 'События' }) },
+    { id: 'history', label: t('editor.tab.history', { defaultValue: 'История' }) },
+  ]
+  return (
+    <div className="flex items-center gap-0 border-b border-line w-full">
+      {tabs.map((tab) => {
+        const isActive = active === tab.id
+        return (
+          <button
+            key={tab.id}
+            type="button"
+            onClick={() => onChange(tab.id)}
+            aria-pressed={isActive}
+            className={[
+              'px-3.5 h-10 text-sm transition-colors -mb-px border-b-2',
+              isActive
+                ? 'border-accent text-ink font-semibold'
+                : 'border-transparent text-ink-2 hover:text-ink',
+            ].join(' ')}
+          >
+            {tab.label}
+          </button>
+        )
+      })}
+    </div>
+  )
+}
+
+/** Fields tab — schema properties summary. */
+function FieldsTabContent({ detail }: { detail: { schemaJson: import('@/api/client').JsonSchema } }) {
+  const props = detail.schemaJson.properties ?? {}
+  const required = new Set(detail.schemaJson.required ?? [])
+  const entries = Object.entries(props)
+  if (entries.length === 0) {
+    return (
+      <div className="text-sm text-mute py-8 text-center">
+        Schema без properties.
+      </div>
+    )
+  }
+  return (
+    <div className="rounded-lg border border-line overflow-hidden">
+      <table className="w-full text-sm">
+        <thead className="bg-surface-2 text-2xs font-display uppercase tracking-[0.10em] text-mute">
+          <tr>
+            <th className="text-left px-3 py-2">name</th>
+            <th className="text-left px-3 py-2">type</th>
+            <th className="text-left px-3 py-2">required</th>
+            <th className="text-left px-3 py-2">unique</th>
+            <th className="text-left px-3 py-2">i18n</th>
+            <th className="text-left px-3 py-2">→ FK</th>
+            <th className="text-left px-3 py-2">description</th>
+          </tr>
+        </thead>
+        <tbody>
+          {entries.map(([key, prop]) => (
+            <tr key={key} className="border-t border-line-2 hover:bg-surface-2/50">
+              <td className="px-3 py-1.5 font-mono text-[12.5px]">{key}</td>
+              <td className="px-3 py-1.5 text-ink-2">{prop.type ?? '—'}</td>
+              <td className="px-3 py-1.5">{required.has(key) ? '✓' : ''}</td>
+              <td className="px-3 py-1.5">{prop['x-unique'] ? '✓' : ''}</td>
+              <td className="px-3 py-1.5">{prop['x-localized'] ? '✓' : ''}</td>
+              <td className="px-3 py-1.5 font-mono text-[11px] text-accent">
+                {prop['x-references'] ?? ''}
+              </td>
+              <td className="px-3 py-1.5 text-ink-2 text-xs max-w-[300px] truncate">
+                {prop.description ?? ''}
+              </td>
+            </tr>
+          ))}
+        </tbody>
+      </table>
+    </div>
+  )
+}
+
+/** JSON tab — raw schema JSON, pretty-printed read-only. */
+function JsonTabContent({ detail }: { detail: { schemaJson: import('@/api/client').JsonSchema } }) {
+  const json = JSON.stringify(detail.schemaJson, null, 2)
+  return (
+    <pre className="rounded-lg border border-line bg-surface-2 p-4 overflow-x-auto text-[12px] font-mono text-ink whitespace-pre">
+      {json}
+    </pre>
+  )
+}
+
+/** Events tab — pointer to audit log scoped to this dict. */
+function EventsTabContent({ dictName }: { dictName: string }) {
+  return (
+    <div className="rounded-lg border border-line bg-surface p-6 text-center space-y-3">
+      <p className="text-sm text-ink-2">
+        События для справочника <span className="font-mono">{dictName}</span> — в общем аудит-логе.
+      </p>
+      <Link
+        to="/audit"
+        search={{ dict: dictName }}
+        className="inline-flex items-center gap-1 text-accent hover:underline text-sm"
+      >
+        Открыть /audit с фильтром →
+      </Link>
+    </div>
+  )
+}
+
+/** History tab — placeholder (Stage 3.x followup, требует backend changelog endpoint). */
+function HistoryTabContent() {
+  return (
+    <div className="rounded-lg border border-dashed border-line bg-surface-2/30 p-8 text-center text-sm text-mute">
+      Timeline изменений справочника — скоро. Требует backend endpoint для schema versions.
+    </div>
+  )
+}