feat(bases): allow updateRow to set position atomically

apps/client/src/features/base/queries/base-row-query.ts

@@ -150,6 +150,9 @@ export function useUpdateRowMutation() {
                   ? {
                       ...row,
                       cells: { ...row.cells, ...variables.cells },
+                      ...(variables.position !== undefined && {
+                        position: variables.position,
+                      }),
                     }
                   : row,
               ),

apps/client/src/features/base/types/base.types.ts

@@ -272,6 +272,7 @@ export type UpdateRowInput = {
   rowId: string;
   pageId: string;
   cells: Record<string, unknown>;
+  position?: string;
   requestId?: string;
 };
 

apps/server/src/core/base/dto/update-row.dto.ts

@@ -25,6 +25,11 @@ export class UpdateRowDto {
   @IsObject()
   cells: Record<string, unknown>;
 
+  @IsOptional()
+  @IsString()
+  @IsNotEmpty()
+  position?: string;
+
   @IsOptional()
   @IsString()
   requestId?: string;

apps/server/src/core/base/services/base-row.service.ts

@@ -135,6 +135,15 @@ export class BaseRowService {
     const properties = await this.basePropertyRepo.findByPageId(dto.pageId);
     const validatedCells = this.validateCells(dto.cells, properties);
 
+    // Smoke-check the position (same guard as `reorder`).
+    if (dto.position !== undefined) {
+      try {
+        generateJitteredKeyBetween(dto.position, null);
+      } catch {
+        throw new BadRequestException('Invalid position value');
+      }
+    }
+
     const existing = await this.baseRowRepo.findById(dto.rowId, { workspaceId });
     const mergedRow = {
       ...((existing?.cells as Record<string, unknown>) ?? {}),
@@ -154,6 +163,7 @@ export class BaseRowService {
         pageId: dto.pageId,
         workspaceId,
         actorId: userId,
+        position: dto.position,
       },
     );
 

apps/server/src/database/repos/base/base-row.repo.ts

@@ -275,6 +275,7 @@ export class BaseRowRepo {
       pageId: string;
       workspaceId: string;
       actorId?: string;
+      position?: string;
       trx?: KyselyTransaction;
     },
   ): Promise<BaseRow | undefined> {
@@ -287,6 +288,7 @@ export class BaseRowRepo {
       .updateTable('baseRows')
       .set({
         cells: sql`jsonb_set_many(cells, ${patchJson}::text::jsonb)`,
+        ...(opts.position !== undefined && { position: opts.position }),
         updatedAt: new Date(),
         lastUpdatedById: opts.actorId ?? null,
       })