feat(web-admin): add arranged tab to transport plan list filters

Insert「已安排」after「待安排」in PL_PLAN_LIST_TABS and map it to followStatus=arranged.

Co-authored-by: Cursor <cursoragent@cursor.com>

web-admin/src/utils/pl-plan-list-tabs.test.ts

@@ -0,0 +1,53 @@
+import assert from 'node:assert/strict'
+import { describe, it } from 'node:test'
+import {
+  PL_PLAN_LIST_TABS,
+  isPlPlanFollowStatusListTab,
+  plPlanListTabToFilters
+} from './pl-display'
+
+describe('PL_PLAN_LIST_TABS', () => {
+  it('places arranged immediately after pending_arrange', () => {
+    const names = PL_PLAN_LIST_TABS.map((t) => t.name)
+    assert.deepEqual(names.slice(0, 3), ['pending_arrange', 'arranged', 'drafting'])
+    assert.equal(
+      PL_PLAN_LIST_TABS.find((t) => t.name === 'arranged')?.label,
+      '已安排'
+    )
+  })
+})
+
+describe('isPlPlanFollowStatusListTab', () => {
+  it('recognizes pending_arrange, arranged, drafting', () => {
+    assert.equal(isPlPlanFollowStatusListTab('pending_arrange'), true)
+    assert.equal(isPlPlanFollowStatusListTab('arranged'), true)
+    assert.equal(isPlPlanFollowStatusListTab('drafting'), true)
+    assert.equal(isPlPlanFollowStatusListTab('all'), false)
+    assert.equal(isPlPlanFollowStatusListTab('inbound'), false)
+  })
+})
+
+describe('plPlanListTabToFilters', () => {
+  it('maps arranged to followStatus arranged with empty planType', () => {
+    assert.deepEqual(plPlanListTabToFilters('arranged'), {
+      planType: '',
+      followStatus: 'arranged'
+    })
+  })
+
+  it('keeps pending_arrange and drafting behavior', () => {
+    assert.deepEqual(plPlanListTabToFilters('pending_arrange'), {
+      planType: '',
+      followStatus: 'pending_arrange'
+    })
+    assert.deepEqual(plPlanListTabToFilters('drafting'), {
+      planType: '',
+      followStatus: 'drafting'
+    })
+  })
+
+  it('maps type tabs without followStatus', () => {
+    assert.deepEqual(plPlanListTabToFilters('all'), { planType: '' })
+    assert.deepEqual(plPlanListTabToFilters('inbound'), { planType: 'inbound' })
+  })
+})