Add user and project rate editing across backend and frontend

backend/src/main/java/com/example/app/project/ProjectService.java

@@ -2,7 +2,9 @@ package com.example.app.project;
 
 import com.example.app.project.ProjectDtos.CreateProjectRequest;
 import com.example.app.project.ProjectDtos.ProjectResponse;
+import com.example.app.project.ProjectDtos.UpdateProjectRequest;
 import com.example.app.time.TimeEntryRepository;
+import jakarta.persistence.EntityNotFoundException;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -53,4 +55,29 @@ public class ProjectService {
     Project saved = projectRepository.save(p);
     return ProjectResponse.from(saved, 0, 0);
   }
+
+  @Transactional
+  public ProjectResponse update(Long id, UpdateProjectRequest req) {
+    Project project =
+        projectRepository
+            .findById(id)
+            .orElseThrow(() -> new EntityNotFoundException("Project not found: " + id));
+    project.setName(req.name());
+    project.setTimeBudgetMinutes(req.timeBudgetMinutes());
+    project.setCostBudgetCents(req.costBudgetCents());
+    project.setHourlyRateCents(req.hourlyRateCents());
+    Project saved = projectRepository.save(project);
+
+    long[] totals = new long[] {0, 0};
+    for (Object[] row : timeEntryRepository.aggregateAllByProject()) {
+      long projectId = ((Number) row[0]).longValue();
+      if (projectId == saved.getId()) {
+        totals[0] = ((Number) row[1]).longValue();
+        totals[1] = ((Number) row[2]).longValue();
+        break;
+      }
+    }
+
+    return ProjectResponse.from(saved, totals[0], totals[1]);
+  }
 }