fix: restore soft-deleted driver record when re-enabling driver toggle

When a coordinator's driver status was toggled off (soft-delete) and
then back on, the create failed because the soft-deleted record still
existed. Now checks for active vs soft-deleted driver records and
restores the existing record instead of trying to create a duplicate.

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

backend/src/users/users.service.ts

@@ -38,8 +38,20 @@ export class UsersService {
     const { isAlsoDriver, ...prismaData } = updateUserDto;
     const effectiveRole = updateUserDto.role || user.role;
 
-    // Handle role change to DRIVER: auto-create driver record
+    const hasActiveDriver = user.driver && !user.driver.deletedAt;
-    if (updateUserDto.role === Role.DRIVER && !user.driver) {
+    const hasSoftDeletedDriver = user.driver && user.driver.deletedAt;
+
+    // Handle role change to DRIVER: auto-create or restore driver record
+    if (updateUserDto.role === Role.DRIVER && !hasActiveDriver) {
+      if (hasSoftDeletedDriver) {
+        this.logger.log(
+          `Restoring soft-deleted Driver record for user ${user.email} (role change to DRIVER)`,
+        );
+        await this.prisma.driver.update({
+          where: { id: user.driver!.id },
+          data: { deletedAt: null, name: user.name || user.email },
+        });
+      } else {
         this.logger.log(
           `Creating Driver record for user ${user.email} (role change to DRIVER)`,
         );
@@ -51,12 +63,22 @@ export class UsersService {
           },
         });
       }
+    }
 
     // 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) {
+    if (isAlsoDriver === true && !hasActiveDriver) {
+      if (hasSoftDeletedDriver) {
+        this.logger.log(
+          `Restoring soft-deleted Driver record for user ${user.email} (isAlsoDriver toggled on)`,
+        );
+        await this.prisma.driver.update({
+          where: { id: user.driver!.id },
+          data: { deletedAt: null, name: user.name || user.email },
+        });
+      } else {
         this.logger.log(
           `Creating Driver record for user ${user.email} (isAlsoDriver toggled on)`,
         );
@@ -67,13 +89,14 @@ export class UsersService {
             userId: user.id,
           },
         });
-    } else if (isAlsoDriver === false && user.driver && effectiveRole !== Role.DRIVER) {
+      }
+    } else if (isAlsoDriver === false && hasActiveDriver && 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 },
+        where: { id: user.driver!.id },
         data: { deletedAt: new Date() },
       });
     }