feat: WTM 멀티프로젝트 플랫폼 구축 (BE + FE 전체 구현)

Phase 0: wbx-spring-core 라이브러리 전환
- java-library 플러그인, WbxAutoConfiguration, Admin 조건부 활성화
- 루트 settings.gradle + build.gradle (멀티모듈)

Phase 1: wtm-api 모듈 생성
- 23개 JPA Entity, 14개 Controller, 79개 API 엔드포인트
- Flyway V100~V107 MySQL 마이그레이션
- TimesheetRuleEngine, TimesheetApprovalHandler, P6WbsParser

Phase 2: wtm-frontend (Vue 3 + PrimeVue 4)
- 10개 도메인 모듈, 17개 View, 5개 서브컴포넌트
- 반응형 레이아웃 (AppLayout, AppSidebar, AppTopbar)
- BaseCrudTable, BaseFormDialog, BasePageHeader 표준 컴포넌트
- JWT 인터셉터, 역할 기반 메뉴 필터링

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

wbx-spring-core/HanwhaOCN/wtmgr/06-reporting-module.md

@@ -0,0 +1,185 @@
+# 06. 리포트 모듈
+
+## PH1-1차 리포트 (2종)
+
+### 1. 프로젝트별 시수 분석 (No.82)
+
+```
+GET /api/reports/project-hours
+    ?projectId=1
+    &from=2025-04-01
+    &to=2025-05-31
+    &groupBy=month          // month, week, discipline
+    &format=json            // json, excel
+```
+
+```java
+@Service
+@RequiredArgsConstructor
+@Transactional(readOnly = true)
+public class ReportService {
+
+    private final TimesheetEntryRepository entryRepository;
+
+    public ProjectHoursReport getProjectHoursReport(ProjectHoursFilter filter) {
+        // QueryDSL 동적 쿼리
+        QTimesheetEntry e = QTimesheetEntry.timesheetEntry;
+        QTimesheet ts = QTimesheet.timesheet;
+        QUser u = QUser.user;
+
+        var query = queryFactory
+            .select(Projections.constructor(ProjectHoursRow.class,
+                e.epcProject.projectCode,
+                e.epcProject.name,
+                u.discipline,
+                e.entryDate,
+                e.hours.sum()
+            ))
+            .from(e)
+            .join(e.timesheet, ts)
+            .join(ts.user, u)
+            .where(
+                ts.status.eq(TimesheetStatus.APPROVED),
+                epcProjectIdEq(filter.getProjectId()),
+                entryDateBetween(filter.getFrom(), filter.getTo())
+            )
+            .groupBy(e.epcProject.projectCode, e.epcProject.name,
+                      u.discipline, e.entryDate);
+
+        List<ProjectHoursRow> rows = query.fetch();
+
+        return ProjectHoursReport.builder()
+            .filter(filter)
+            .rows(rows)
+            .totalHours(rows.stream()
+                .map(ProjectHoursRow::getHours)
+                .reduce(BigDecimal.ZERO, BigDecimal::add))
+            .generatedAt(LocalDateTime.now())
+            .build();
+    }
+}
+```
+
+### 2. WBS Level별 시수 분석 (No.83)
+
+```
+GET /api/reports/wbs-hours
+    ?projectId=1
+    &wbsLevel=3             // 1~5
+    &from=2025-04-01
+    &to=2025-05-31
+    &format=json
+```
+
+```java
+public WbsHoursReport getWbsHoursReport(WbsHoursFilter filter) {
+    var rows = queryFactory
+        .select(Projections.constructor(WbsHoursRow.class,
+            cw.wbsCode,
+            cw.name,
+            cw.level,
+            cw.discipline,
+            e.hours.sum(),
+            ts.user.countDistinct()
+        ))
+        .from(e)
+        .join(e.timesheet, ts)
+        .join(e.canonicalWbs, cw)
+        .where(
+            ts.status.eq(TimesheetStatus.APPROVED),
+            cw.projectId.eq(filter.getProjectId()),
+            cw.level.eq(filter.getWbsLevel()),
+            entryDateBetween(filter.getFrom(), filter.getTo())
+        )
+        .groupBy(cw.wbsCode, cw.name, cw.level, cw.discipline)
+        .orderBy(cw.wbsCode.asc())
+        .fetch();
+
+    return WbsHoursReport.builder()
+        .filter(filter)
+        .rows(rows)
+        .build();
+}
+```
+
+## PH1-2차 리포트 (2종)
+
+### 3. Phase별 시수 비율 (No.85)
+
+```
+GET /api/reports/phase-ratio?projectId=1&from=...&to=...
+```
+
+### 4. Non-Project 시수 비율 (No.86)
+
+```
+GET /api/reports/np-ratio?department=Engineering&from=...&to=...
+```
+
+## Excel Export
+
+```java
+@Service
+public class ReportExcelExporter {
+
+    public byte[] exportProjectHours(ProjectHoursReport report) {
+        try (Workbook wb = new XSSFWorkbook()) {
+            Sheet sheet = wb.createSheet("프로젝트별 시수");
+
+            // 헤더
+            CellStyle headerStyle = createHeaderStyle(wb);
+            Row header = sheet.createRow(0);
+            String[] headers = {"프로젝트코드", "프로젝트명", "Discipline", "날짜", "시수(h)"};
+            for (int i = 0; i < headers.length; i++) {
+                Cell cell = header.createCell(i);
+                cell.setCellValue(headers[i]);
+                cell.setCellStyle(headerStyle);
+            }
+
+            // 데이터
+            int rowIdx = 1;
+            for (ProjectHoursRow row : report.getRows()) {
+                Row r = sheet.createRow(rowIdx++);
+                r.createCell(0).setCellValue(row.getProjectCode());
+                r.createCell(1).setCellValue(row.getProjectName());
+                r.createCell(2).setCellValue(row.getDiscipline());
+                r.createCell(3).setCellValue(row.getDate().toString());
+                r.createCell(4).setCellValue(row.getHours().doubleValue());
+            }
+
+            // 합계 행
+            Row totalRow = sheet.createRow(rowIdx);
+            totalRow.createCell(3).setCellValue("합계");
+            totalRow.createCell(4).setCellValue(report.getTotalHours().doubleValue());
+
+            // Auto-size
+            for (int i = 0; i < headers.length; i++) sheet.autoSizeColumn(i);
+
+            ByteArrayOutputStream out = new ByteArrayOutputStream();
+            wb.write(out);
+            return out.toByteArray();
+        }
+    }
+}
+```
+
+## REST API (리포트)
+
+```
+# PH1-1차
+GET  /api/reports/project-hours          프로젝트별 시수 분석
+GET  /api/reports/project-hours/export   Excel 다운로드
+GET  /api/reports/wbs-hours              WBS Level별 시수 분석
+GET  /api/reports/wbs-hours/export       Excel 다운로드
+
+# PH1-2차
+GET  /api/reports/phase-ratio            Phase별 시수 비율
+GET  /api/reports/np-ratio               Non-Project 시수 비율
+GET  /api/reports/wbs-version-history    WBS 버전 이력 조회
+
+# 공통 파라미터
+#   projectId  - 프로젝트 ID (필수/선택)
+#   from, to   - 기간 (ISO 8601)
+#   groupBy    - 집계 기준 (month, week, discipline)
+#   format     - 응답 형식 (json, excel)
+```