Add a small internal warehouse and party balances when Tahesab is off.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/api/src/inventory/inventory.controller.ts

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+import {
+  Body,
+  Controller,
+  Get,
+  Param,
+  Patch,
+  Post,
+  Query,
+  UseGuards,
+} from '@nestjs/common';
+import { JwtAuthGuard } from '../auth/jwt-auth.guard';
+import { CurrentUser } from '../auth/current-user.decorator';
+import { Roles } from '../auth/roles.decorator';
+import { RolesGuard } from '../auth/roles.guard';
+import { CreateStockMovementDto, UpdatePartyOpeningDto } from './dto';
+import { InventoryService } from './inventory.service';
+
+type AuthUser = { organizationId: string };
+
+@Controller('inventory')
+@UseGuards(JwtAuthGuard, RolesGuard)
+export class InventoryController {
+  constructor(private readonly inventory: InventoryService) {}
+
+  @Get()
+  summary(@CurrentUser() user: AuthUser) {
+    return this.inventory.getSummary(user.organizationId);
+  }
+
+  @Get('movements')
+  movements(
+    @CurrentUser() user: AuthUser,
+    @Query('productId') productId?: string,
+  ) {
+    return this.inventory.listMovements(user.organizationId, productId);
+  }
+
+  @Post('movements')
+  @Roles('owner', 'admin')
+  addMovement(
+    @CurrentUser() user: AuthUser,
+    @Body() dto: CreateStockMovementDto,
+  ) {
+    return this.inventory.addManualMovement(user.organizationId, dto);
+  }
+
+  @Get('party/:personId')
+  partyBalance(
+    @CurrentUser() user: AuthUser,
+    @Param('personId') personId: string,
+  ) {
+    return this.inventory.getPartyBalance(user.organizationId, personId);
+  }
+
+  @Patch('party/:personId/opening')
+  @Roles('owner', 'admin')
+  setOpening(
+    @CurrentUser() user: AuthUser,
+    @Param('personId') personId: string,
+    @Body() dto: UpdatePartyOpeningDto,
+  ) {
+    return this.inventory.setPartyOpening(
+      user.organizationId,
+      personId,
+      dto.amount,
+      dto.note,
+    );
+  }
+}