fix(web-admin): restore fold icon in production and toggle archive planNo.

Remove Tailwind inline from el-icon so production CSS no longer collapses the header fold control, and expose 计划编号 in the plan-archive column picker.

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

web-admin/scripts/issue-26-fold-icon-and-archive-plan-no.test.ts

@@ -0,0 +1,36 @@
+/**
+ * #26 回归：
+ * 1) ArtSvgIcon 的 el-icon 不得带 Tailwind `inline`（生产 CSS 会覆盖 display）
+ * 2) 运输归档列展示含 planNo，且表格列受 isColumnVisible 控制
+ */
+import test from 'node:test'
+import assert from 'node:assert/strict'
+import { readFileSync } from 'node:fs'
+import { dirname, join } from 'node:path'
+import { fileURLToPath } from 'node:url'
+import { parse } from '@vue/compiler-sfc'
+
+const root = join(dirname(fileURLToPath(import.meta.url)), '..')
+
+test('ArtSvgIcon: el-icon branch must not use Tailwind inline class', () => {
+  const src = readFileSync(join(root, 'src/components/core/base/art-svg-icon/index.vue'), 'utf8')
+  const { descriptor } = parse(src)
+  const template = descriptor.template?.content || ''
+  assert.match(template, /<el-icon\b[^>]*class="[^"]*art-svg-icon/)
+  assert.doesNotMatch(
+    template,
+    /<el-icon\b[^>]*class="[^"]*\binline\b/,
+    'el-icon must not include Tailwind inline (breaks display:inline-flex in prod CSS order)'
+  )
+})
+
+test('plan-archive: planNo is in column defs and table visibility gate', () => {
+  const src = readFileSync(join(root, 'src/views/pl/plan-archive/index.vue'), 'utf8')
+  assert.match(src, /prop:\s*'planNo',\s*label:\s*'计划编号'/)
+  assert.match(src, /pl-plan-archive-list-columns-v17/)
+  assert.match(
+    src,
+    /v-if="isColumnVisible\('planNo'\)"[\s\S]*?prop="planNo"/,
+    'planNo table column must be gated by isColumnVisible'
+  )
+})