fix(web-admin): 恢复采集大表导出并按运费批次归拢合并

去掉临时隐藏开关，导出自存/科研表时先按运费批次聚拢再合并单元格。

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

web-admin/src/views/cell-storage/protocol-audit/DonationProtocolTab.vue

@@ -75,12 +75,7 @@
           <el-icon><Plus /></el-icon>
           新增
         </el-button>
-        <el-button
-          v-if="COLLECTION_LEDGER_EXPORT_ENABLED"
-          class="btn-ghost"
-          :loading="exporting"
-          @click="handleExport"
-        >
+        <el-button class="btn-ghost" :loading="exporting" @click="handleExport">
           <el-icon><Download /></el-icon>
           导出 Excel
         </el-button>
@@ -467,7 +462,6 @@
   } from '@/utils/protocol-doc-label'
   import { loadVoidTypeDict } from '@/utils/void-type-dict'
   import {
-    COLLECTION_LEDGER_EXPORT_ENABLED,
     RESEARCH_HEADERS,
     buildResearchLedgerRows,
     fetchAllPages,

web-admin/src/views/cell-storage/protocol-audit/ProtocolAuditTab.vue

@@ -79,12 +79,7 @@
           <el-icon><Plus /></el-icon>
           新增
         </el-button>
-        <el-button
-          v-if="COLLECTION_LEDGER_EXPORT_ENABLED"
-          class="btn-ghost"
-          :loading="exporting"
-          @click="handleExport"
-        >
+        <el-button class="btn-ghost" :loading="exporting" @click="handleExport">
           <el-icon><Download /></el-icon>
           导出 Excel
         </el-button>
@@ -435,7 +430,6 @@
   } from '@/utils/status-tag-registry'
   import { loadVoidTypeDict } from '@/utils/void-type-dict'
   import {
-    COLLECTION_LEDGER_EXPORT_ENABLED,
     CELL_STORAGE_HEADERS,
     buildCellStorageLedgerRows,
     fetchAllPages,

web-admin/src/views/cell-storage/sample-info/UnifiedSampleInfoPage.vue

@@ -93,7 +93,7 @@
           登记入库
         </el-button>
         <el-button
-          v-if="isCellStorage && COLLECTION_LEDGER_EXPORT_ENABLED"
+          v-if="isCellStorage"
           class="btn-ghost"
           :loading="exporting"
           @click="handleExport"
@@ -522,7 +522,6 @@
     sampleStorageFlagTagType
   } from '@/utils/status-tag-registry'
   import {
-    COLLECTION_LEDGER_EXPORT_ENABLED,
     CUSTOMER_SERVICE_HEADERS,
     buildCustomerServiceLedgerRows,
     fetchAllPages,