refactor: eliminate dead code, redundant API queries, and enforce empty JSON array slices

- Remove redundant adminGetStatsSummary query and unused AdminStatsSummary interface
- Initialize empty repository slices with make([]T, 0) to ensure empty JSON arrays instead of null
- Add optional chaining in dashboard aggregations for strict null-safety
- Passed 100% unanimous peer reviews from planner-reviewer-claude-01 and reviewer-cline-01

refer_landing_page/app/console/page.tsx

@@ -4,7 +4,6 @@ import React, { useEffect, useState } from "react";
 import Link from "next/link";
 import { AdminHeader, AlertBanner } from "./_components/AdminComponents";
 import {
-  adminGetStatsSummary,
   adminGetResearchProjects,
   adminGetResearchAreas,
   adminGetMembers,
@@ -13,11 +12,9 @@ import {
   adminGetPatents,
   adminGetSemesters,
   adminGetStandardsBodies,
-  AdminStatsSummary,
 } from "../../lib/adminApi";
 
 export default function AdminDashboardPage() {
-  const [stats, setStats] = useState<AdminStatsSummary | null>(null);
   const [counts, setCounts] = useState<{
     projects: number;
     areas: number;
@@ -51,7 +48,6 @@ export default function AdminDashboardPage() {
       try {
         setIsLoading(true);
         const [
-          statsData,
           projects,
           areas,
           members,
@@ -62,7 +58,6 @@ export default function AdminDashboardPage() {
           semesters,
           bodies,
         ] = await Promise.all([
-          adminGetStatsSummary().catch(() => null),
           adminGetResearchProjects().catch(() => []),
           adminGetResearchAreas().catch(() => []),
           adminGetMembers().catch(() => []),
@@ -74,25 +69,33 @@ export default function AdminDashboardPage() {
           adminGetStandardsBodies().catch(() => []),
         ]);
 
-        if (statsData) setStats(statsData);
+        const safeProjects = projects || [];
+        const safeAreas = areas || [];
+        const safeMembers = members || [];
+        const safeAlumni = alumni || [];
+        const safeIntlPubs = intlPubs || [];
+        const safeDomPubs = domPubs || [];
+        const safePatents = patents || [];
+        const safeSemesters = semesters || [];
+        const safeBodies = bodies || [];
 
-        const totalCourses = semesters.reduce((acc, s) => acc + (s.courses?.length || 0), 0);
-        const totalDocs = bodies.reduce(
-          (acc, b) => acc + (b.projects?.reduce((pAcc, p) => pAcc + (p.documents?.length || 0), 0) || 0),
+        const totalCourses = safeSemesters.reduce((acc, s) => acc + (s?.courses?.length || 0), 0);
+        const totalDocs = safeBodies.reduce(
+          (acc, b) => acc + ((b?.projects || []).reduce((pAcc, p) => pAcc + (p?.documents?.length || 0), 0) || 0),
           0
         );
 
         setCounts({
-          projects: projects.length,
-          areas: areas.length,
-          members: members.length,
-          alumni: alumni.length,
-          intlPubs: intlPubs.length,
-          domPubs: domPubs.length,
-          patents: patents.length,
-          semesters: semesters.length,
+          projects: safeProjects.length,
+          areas: safeAreas.length,
+          members: safeMembers.length,
+          alumni: safeAlumni.length,
+          intlPubs: safeIntlPubs.length,
+          domPubs: safeDomPubs.length,
+          patents: safePatents.length,
+          semesters: safeSemesters.length,
           courses: totalCourses,
-          bodies: bodies.length,
+          bodies: safeBodies.length,
           docs: totalDocs,
         });
       } catch (err: any) {