fix(tkpurchase): 협력업체 포탈 활성 일정 전체 표시로 변경

오늘 날짜 범위 필터 제거 → 마감/취소되지 않은 모든 일정 표시.
체크인 날짜 제한도 상태 기반 검증으로 변경하여 일정 기간 외에도 체크인 가능.

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

tkpurchase/api/models/scheduleModel.js

@@ -117,4 +117,17 @@ async function deleteSchedule(id) {
   await db.query('DELETE FROM partner_schedules WHERE id = ?', [id]);
 }
 
-module.exports = { findAll, findById, findByCompanyToday, findRequestsByCompany, findByProject, create, update, updateStatus, deleteSchedule };
+async function findActiveByCompany(companyId) {
+  const db = getPool();
+  const [rows] = await db.query(
+    `SELECT ps.*, pc.company_name, p.project_name, p.job_no
+     FROM partner_schedules ps
+     LEFT JOIN partner_companies pc ON ps.company_id = pc.id
+     LEFT JOIN projects p ON ps.project_id = p.project_id
+     WHERE ps.company_id = ?
+       AND ps.status NOT IN ('cancelled','rejected','requested','completed')
+     ORDER BY ps.start_date ASC, ps.created_at DESC`, [companyId]);
+  return rows;
+}
+
+module.exports = { findAll, findById, findByCompanyToday, findActiveByCompany, findRequestsByCompany, findByProject, create, update, updateStatus, deleteSchedule };