fix: 협력업체 목록 안 뜨는 버그 수정 — c.name → c.company_name

partner_companies 테이블 컬럼명은 company_name인데 JS에서 c.name으로
접근하여 undefined가 반환되던 문제. accounts/schedule/workreport 3개 파일 6곳 수정.

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

tkpurchase/web/static/js/tkpurchase-schedule.js

@@ -109,7 +109,7 @@ function setupCompanyAutocomplete(inputId, dropdownId, hiddenId) {
                     dropdown.innerHTML = '<div class="px-3 py-2 text-sm text-gray-400">결과 없음</div>';
                 } else {
                     dropdown.innerHTML = list.map(c =>
-                        `<div class="px-3 py-2 text-sm hover:bg-emerald-50 cursor-pointer" onclick="selectCompany('${inputId}','${hiddenId}','${dropdownId}',${c.id},'${escapeHtml(c.name)}')">${escapeHtml(c.name)}</div>`
+                        `<div class="px-3 py-2 text-sm hover:bg-emerald-50 cursor-pointer" onclick="selectCompany('${inputId}','${hiddenId}','${dropdownId}',${c.id},'${escapeHtml(c.company_name)}')">${escapeHtml(c.company_name)}</div>`
                     ).join('');
                 }
                 dropdown.classList.remove('hidden');