feat: PMR 질병정보 표시

- PS_MAIN.St1, St2 + PM_BASE.CD_SANG JOIN
- 처방 헤더에 🩺 질병명 표시
- disease_info: {code_1, code_2, name_1, name_2}

backend/templates/pmr.html

@@ -574,11 +574,24 @@
                     document.getElementById('detailInfo').textContent = 
                         `${data.patient.age || '-'}세 / ${data.patient.gender || '-'} / ${data.patient.birthdate || '-'}`;
                     
+                    // 질병 정보 표시
+                    let diseaseHtml = '';
+                    if (data.disease_info) {
+                        const d = data.disease_info;
+                        const diseases = [];
+                        if (d.name_1) diseases.push(d.name_1);
+                        if (d.name_2) diseases.push(d.name_2);
+                        if (diseases.length > 0) {
+                            diseaseHtml = `<span style="background:#fef3c7;color:#92400e;">🩺 ${diseases.join(', ')}</span>`;
+                        }
+                    }
+                    
                     document.getElementById('rxInfo').innerHTML = `
                         <span>🏥 ${data.prescription.hospital || '-'}</span>
                         <span>👨‍⚕️ ${data.prescription.doctor || '-'}</span>
                         <span>📅 ${data.prescription.date}</span>
                         <span>💊 ${data.medication_count}종</span>
+                        ${diseaseHtml}
                     `;
                     
                     // 약품 테이블