fix(tkfb): project_code → job_no 컬럼명 수정 (500 에러 해결)

projects 테이블에 project_code 컬럼이 없고 job_no가 올바른 컬럼명.
백엔드 SQL에서는 pr.job_no AS project_code alias 사용,
프론트 드롭다운에서는 p.job_no로 직접 참조.

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

system1-factory/web/js/meeting-detail.js

@@ -35,7 +35,7 @@ document.addEventListener('DOMContentLoaded', async () => {
     // Populate project select in item modal
     const projSel = document.getElementById('itemProject');
     projects.forEach(p => {
-        projSel.innerHTML += `<option value="${p.project_id}">${escapeHtml(p.project_code)} ${escapeHtml(p.project_name)}</option>`;
+        projSel.innerHTML += `<option value="${p.project_id}">${escapeHtml(p.job_no)} ${escapeHtml(p.project_name)}</option>`;
     });
 
     // Populate responsible user select