fix(tkpurchase): 일정 목록 미표시 버그 수정 — 캐시·타임존·페이지네이션

- API에 Cache-Control: no-store 미들웨어 추가 (304 캐시 문제 해결)
- toLocalDate() 유틸 추가, 전체 8개 JS의 toISOString 타임존 버그 수정
- scheduleModel.findAll에 total COUNT 추가, 컨트롤러에서 total 반환
- HTML 캐시 버스팅 ?v=2026031601

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

tkpurchase/api/models/scheduleModel.js

@@ -1,27 +1,35 @@
 const { getPool } = require('./partnerModel');
 
+function buildWhereClause({ company, company_id, date_from, date_to, status, project_id }) {
+  let where = ' WHERE 1=1';
+  const params = [];
+  if (company) { where += ' AND pc.company_name LIKE ?'; params.push('%' + company + '%'); }
+  if (company_id) { where += ' AND ps.company_id = ?'; params.push(company_id); }
+  if (date_from) { where += ' AND ps.end_date >= ?'; params.push(date_from); }
+  if (date_to) { where += ' AND ps.start_date <= ?'; params.push(date_to); }
+  if (status) { where += ' AND ps.status = ?'; params.push(status); }
+  if (project_id) { where += ' AND ps.project_id = ?'; params.push(project_id); }
+  return { where, params };
+}
+
 async function findAll({ company, company_id, date_from, date_to, status, project_id, page = 1, limit = 50 } = {}) {
   const db = getPool();
-  let sql = `SELECT ps.*, pc.company_name, su.name AS registered_by_name,
-                    p.project_name, p.job_no
-             FROM partner_schedules ps
+  const { where, params } = buildWhereClause({ company, company_id, date_from, date_to, status, project_id });
+
+  const fromClause = ` FROM partner_schedules ps
              LEFT JOIN partner_companies pc ON ps.company_id = pc.id
              LEFT JOIN sso_users su ON ps.registered_by = su.user_id
-             LEFT JOIN projects p ON ps.project_id = p.project_id
-             WHERE 1=1`;
-  const params = [];
-  if (company) { sql += ' AND pc.company_name LIKE ?'; params.push('%' + company + '%'); }
-  if (company_id) { sql += ' AND ps.company_id = ?'; params.push(company_id); }
-  if (date_from) { sql += ' AND ps.end_date >= ?'; params.push(date_from); }
-  if (date_to) { sql += ' AND ps.start_date <= ?'; params.push(date_to); }
-  if (status) { sql += ' AND ps.status = ?'; params.push(status); }
-  if (project_id) { sql += ' AND ps.project_id = ?'; params.push(project_id); }
+             LEFT JOIN projects p ON ps.project_id = p.project_id`;
+
+  const [countResult] = await db.query('SELECT COUNT(*) AS cnt' + fromClause + where, params);
+
+  let sql = `SELECT ps.*, pc.company_name, su.name AS registered_by_name,
+                    p.project_name, p.job_no` + fromClause + where;
   sql += ' ORDER BY ps.start_date DESC, ps.created_at DESC';
   const offset = (page - 1) * limit;
   sql += ' LIMIT ? OFFSET ?';
-  params.push(limit, offset);
-  const [rows] = await db.query(sql, params);
-  return rows;
+  const [rows] = await db.query(sql, [...params, limit, offset]);
+  return { rows, total: countResult[0].cnt };
 }
 
 async function findById(id) {