feat(project): show presign counts as a statistics column

Group presign counts by project and team, include totals and unassigned rows, and reuse count drill-down. Remove the standalone footer while retaining presignTotal compatibility and the four formal business types.

Related to issue #13. Independent source review completed; no tests or builds run under user self-test arrangement.

web-admin/src/views/project-management/statistics/index.vue

@@ -47,7 +47,7 @@
             min-width="150"
           />
           <el-table-column
-            v-for="key in formalTypes"
+            v-for="key in statisticsTypes"
             :key="key"
             :label="bizLabels[key]"
             min-width="130"
@@ -56,8 +56,8 @@
                 ><el-icon><View /></el-icon>{{ row[key] || 0 }}</el-button
               ></template
             ></el-table-column
-          > </el-table
-        ><p class="form-tip">预签约：{{ data.presignTotal }} 单（单独计数）</p></div
+          >
+        </el-table></div
       >
       <el-dialog
         v-model="detailsVisible"
@@ -91,7 +91,8 @@
     unassignedTotals: ProjectRecord
     presignTotal: number
   }>({ items: [], totals: {}, unassignedTotals: {}, presignTotal: 0 })
-  const formalTypes: BizType[] = [
+  const statisticsTypes: BizType[] = [
+    'presign',
     'cell_storage',
     'research_donation',
     'pilot_service',