feat(orders): issued_orders schema + migration

Pre-existing quotations.project_code + ai_chat_messages FK drift is captured in its own reconcile_quotations_aichat_fk migration; the issued_orders migration is purely additive.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

prisma/migrations/20260609085127_reconcile_quotations_aichat_fk/migration.sql

@@ -0,0 +1,8 @@
+-- DropForeignKey
+ALTER TABLE `ai_chat_messages` DROP FOREIGN KEY `fk_ai_chat_conv`;
+
+-- AlterTable
+ALTER TABLE `quotations` MODIFY `project_code` VARCHAR(100) NULL;
+
+-- AddForeignKey
+ALTER TABLE `ai_chat_messages` ADD CONSTRAINT `ai_chat_messages_conversation_id_fkey` FOREIGN KEY (`conversation_id`) REFERENCES `ai_conversations`(`id`) ON DELETE CASCADE ON UPDATE CASCADE;

prisma/migrations/20260609085152_issued_orders/migration.sql

@@ -0,0 +1,52 @@
+-- AlterTable
+ALTER TABLE `company_settings` ADD COLUMN `issued_order_number_pattern` VARCHAR(100) NULL,
+    ADD COLUMN `issued_order_type_code` VARCHAR(10) NULL;
+
+-- CreateTable
+CREATE TABLE `issued_orders` (
+    `id` INTEGER NOT NULL AUTO_INCREMENT,
+    `po_number` VARCHAR(50) NULL,
+    `customer_id` INTEGER NULL,
+    `status` ENUM('draft', 'sent', 'confirmed', 'completed', 'cancelled') NOT NULL DEFAULT 'draft',
+    `currency` VARCHAR(10) NULL DEFAULT 'CZK',
+    `vat_rate` DECIMAL(5, 2) NULL DEFAULT 21.00,
+    `apply_vat` BOOLEAN NULL DEFAULT true,
+    `exchange_rate` DECIMAL(10, 4) NULL DEFAULT 1.0000,
+    `order_date` DATE NULL,
+    `delivery_date` DATE NULL,
+    `language` VARCHAR(5) NULL DEFAULT 'cs',
+    `delivery_terms` VARCHAR(500) NULL,
+    `payment_terms` VARCHAR(500) NULL,
+    `issued_by` VARCHAR(255) NULL,
+    `notes` TEXT NULL,
+    `internal_notes` TEXT NULL,
+    `created_at` DATETIME(0) NULL DEFAULT CURRENT_TIMESTAMP(0),
+    `modified_at` DATETIME(0) NULL,
+
+    UNIQUE INDEX `idx_issued_orders_number_unique`(`po_number`),
+    INDEX `issued_orders_customer_id`(`customer_id`),
+    INDEX `idx_issued_orders_status_date`(`status`, `order_date`),
+    PRIMARY KEY (`id`)
+) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
+
+-- CreateTable
+CREATE TABLE `issued_order_items` (
+    `id` INTEGER NOT NULL AUTO_INCREMENT,
+    `issued_order_id` INTEGER NOT NULL,
+    `description` VARCHAR(500) NULL,
+    `item_description` TEXT NULL,
+    `quantity` DECIMAL(12, 3) NULL DEFAULT 1.000,
+    `unit` VARCHAR(20) NULL,
+    `unit_price` DECIMAL(12, 2) NULL DEFAULT 0.00,
+    `vat_rate` DECIMAL(5, 2) NULL DEFAULT 21.00,
+    `position` INTEGER NULL DEFAULT 0,
+
+    INDEX `issued_order_id`(`issued_order_id`),
+    PRIMARY KEY (`id`)
+) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
+
+-- AddForeignKey
+ALTER TABLE `issued_orders` ADD CONSTRAINT `issued_orders_ibfk_1` FOREIGN KEY (`customer_id`) REFERENCES `customers`(`id`) ON DELETE RESTRICT ON UPDATE NO ACTION;
+
+-- AddForeignKey
+ALTER TABLE `issued_order_items` ADD CONSTRAINT `issued_order_items_ibfk_1` FOREIGN KEY (`issued_order_id`) REFERENCES `issued_orders`(`id`) ON DELETE CASCADE ON UPDATE NO ACTION;

prisma/schema.prisma

@@ -164,6 +164,8 @@ model company_settings {
   offer_number_pattern     String?   @db.VarChar(100)
   order_number_pattern     String?   @db.VarChar(100)
   invoice_number_pattern   String?   @db.VarChar(100)
+  issued_order_number_pattern String?   @db.VarChar(100)
+  issued_order_type_code      String?   @db.VarChar(10)
   warehouse_receipt_prefix          String?   @db.VarChar(20)
   warehouse_receipt_number_pattern  String?   @db.VarChar(100)
   warehouse_issue_prefix            String?   @db.VarChar(20)
@@ -189,6 +191,7 @@ model customers {
   sync_version  Int?         @default(0)
   invoices      invoices[]
   orders        orders[]
+  issued_orders issued_orders[]
   projects      projects[]
   quotations    quotations[]
 }
@@ -362,6 +365,55 @@ model orders {
   @@index([quotation_id], map: "quotation_id")
 }
 
+model issued_orders {
+  id              Int                  @id @default(autoincrement())
+  po_number       String?              @unique(map: "idx_issued_orders_number_unique") @db.VarChar(50)
+  customer_id     Int?
+  status          issued_orders_status @default(draft)
+  currency        String?              @default("CZK") @db.VarChar(10)
+  vat_rate        Decimal?             @default(21.00) @db.Decimal(5, 2)
+  apply_vat       Boolean?             @default(true)
+  exchange_rate   Decimal?             @default(1.0000) @db.Decimal(10, 4)
+  order_date      DateTime?            @db.Date
+  delivery_date   DateTime?            @db.Date
+  language        String?              @default("cs") @db.VarChar(5)
+  delivery_terms  String?              @db.VarChar(500)
+  payment_terms   String?              @db.VarChar(500)
+  issued_by       String?              @db.VarChar(255)
+  notes           String?              @db.Text
+  internal_notes  String?              @db.Text
+  created_at      DateTime?            @default(now()) @db.DateTime(0)
+  modified_at     DateTime?            @db.DateTime(0)
+  issued_order_items issued_order_items[]
+  customers       customers?           @relation(fields: [customer_id], references: [id], onDelete: Restrict, onUpdate: NoAction, map: "issued_orders_ibfk_1")
+
+  @@index([customer_id], map: "issued_orders_customer_id")
+  @@index([status, order_date], map: "idx_issued_orders_status_date")
+}
+
+model issued_order_items {
+  id               Int           @id @default(autoincrement())
+  issued_order_id  Int
+  description      String?       @db.VarChar(500)
+  item_description String?       @db.Text
+  quantity         Decimal?      @default(1.000) @db.Decimal(12, 3)
+  unit             String?       @db.VarChar(20)
+  unit_price       Decimal?      @default(0.00) @db.Decimal(12, 2)
+  vat_rate         Decimal?      @default(21.00) @db.Decimal(5, 2)
+  position         Int?          @default(0)
+  issued_orders    issued_orders @relation(fields: [issued_order_id], references: [id], onDelete: Cascade, onUpdate: NoAction, map: "issued_order_items_ibfk_1")
+
+  @@index([issued_order_id], map: "issued_order_id")
+}
+
+enum issued_orders_status {
+  draft
+  sent
+  confirmed
+  completed
+  cancelled
+}
+
 model permissions {
   id               Int                @id @default(autoincrement())
   name             String             @unique(map: "name") @db.VarChar(50)