feat: allow admins and coordinators to also be drivers

Add a "Driver" checkbox column to the User Management page. Checking it
creates a linked Driver record so the user appears in the drivers list,
can be assigned events, and enrolled for GPS tracking — without changing
their primary role. The DRIVER role checkbox is auto-checked and disabled
since being a driver is inherent to that role. Promoting a user from
DRIVER to Admin/Coordinator preserves their driver record.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/src/users/users.service.ts

@@ -35,36 +35,52 @@ export class UsersService {
 
     this.logger.log(`Updating user ${id}: ${JSON.stringify(updateUserDto)}`);
 
-    // Handle role change and Driver record synchronization
-    if (updateUserDto.role && updateUserDto.role !== user.role) {
-      // If changing TO DRIVER role, create a Driver record if one doesn't exist
-      if (updateUserDto.role === Role.DRIVER && !user.driver) {
-        this.logger.log(
-          `Creating Driver record for user ${user.email} (role change to DRIVER)`,
-        );
-        await this.prisma.driver.create({
-          data: {
-            name: user.name || user.email,
-            phone: user.email, // Use email as placeholder for phone
-            userId: user.id,
-          },
-        });
-      }
+    const { isAlsoDriver, ...prismaData } = updateUserDto;
+    const effectiveRole = updateUserDto.role || user.role;
 
-      // If changing FROM DRIVER role to something else, remove the Driver record
-      if (user.role === Role.DRIVER && updateUserDto.role !== Role.DRIVER && user.driver) {
-        this.logger.log(
-          `Removing Driver record for user ${user.email} (role change from DRIVER to ${updateUserDto.role})`,
-        );
-        await this.prisma.driver.delete({
-          where: { id: user.driver.id },
-        });
-      }
+    // Handle role change to DRIVER: auto-create driver record
+    if (updateUserDto.role === Role.DRIVER && !user.driver) {
+      this.logger.log(
+        `Creating Driver record for user ${user.email} (role change to DRIVER)`,
+      );
+      await this.prisma.driver.create({
+        data: {
+          name: user.name || user.email,
+          phone: user.email,
+          userId: user.id,
+        },
+      });
+    }
+
+    // When promoting FROM DRIVER to Admin/Coordinator, keep the driver record
+    // (admin can explicitly uncheck the driver box later if they want)
+
+    // Handle "Also a Driver" toggle (independent of role)
+    if (isAlsoDriver === true && !user.driver) {
+      this.logger.log(
+        `Creating Driver record for user ${user.email} (isAlsoDriver toggled on)`,
+      );
+      await this.prisma.driver.create({
+        data: {
+          name: user.name || user.email,
+          phone: user.email,
+          userId: user.id,
+        },
+      });
+    } else if (isAlsoDriver === false && user.driver && effectiveRole !== Role.DRIVER) {
+      // Only allow removing driver record if user is NOT in the DRIVER role
+      this.logger.log(
+        `Soft-deleting Driver record for user ${user.email} (isAlsoDriver toggled off)`,
+      );
+      await this.prisma.driver.update({
+        where: { id: user.driver.id },
+        data: { deletedAt: new Date() },
+      });
     }
 
     return this.prisma.user.update({
       where: { id: user.id },
-      data: updateUserDto,
+      data: prismaData,
       include: { driver: true },
     });
   }