feat(server): evaluate price alerts per product and fix gold discharge rounding

Alerts now bind to a product_id and share one evaluator; displayed gold within a rounding step discharges the full wallet.

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

database/migrations/2026_08_18_000002_add_product_id_to_price_triggers_table.php

@@ -0,0 +1,34 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        if (! Schema::hasTable('price_triggers')) {
+            return;
+        }
+
+        Schema::table('price_triggers', function (Blueprint $table) {
+            if (! Schema::hasColumn('price_triggers', 'product_id')) {
+                $table->unsignedBigInteger('product_id')->nullable()->after('customer_id');
+                $table->index('product_id');
+            }
+        });
+    }
+
+    public function down(): void
+    {
+        if (! Schema::hasTable('price_triggers') || ! Schema::hasColumn('price_triggers', 'product_id')) {
+            return;
+        }
+
+        Schema::table('price_triggers', function (Blueprint $table) {
+            $table->dropIndex(['product_id']);
+            $table->dropColumn('product_id');
+        });
+    }
+};

database/schema/mysql-schema.sql.reference

@@ -593,6 +593,7 @@ DROP TABLE IF EXISTS `price_triggers`;
 CREATE TABLE `price_triggers` (
   `id` bigint unsigned NOT NULL AUTO_INCREMENT,
   `customer_id` bigint unsigned NOT NULL,
+  `product_id` bigint unsigned DEFAULT NULL,
   `target_price` bigint NOT NULL,
   `price_condition` varchar(50) CHARACTER SET latin1 COLLATE latin1_swedish_ci NOT NULL,
   `action` varchar(50) CHARACTER SET latin1 COLLATE latin1_swedish_ci NOT NULL,

database/sql/add_price_trigger_product_id.sql

@@ -0,0 +1,25 @@
+-- محصول هشدار قیمت (price_triggers.product_id)
+-- امن برای اجرای مجدد
+-- USE دیتابیس_خودتان;
+
+SET @db = DATABASE();
+
+SET @sql = IF(
+    (SELECT COUNT(*) FROM information_schema.TABLES
+        WHERE TABLE_SCHEMA = @db AND TABLE_NAME = 'price_triggers') = 0,
+    'SELECT ''skip: price_triggers table not found'' AS info',
+    IF(
+        (SELECT COUNT(*) FROM information_schema.COLUMNS
+            WHERE TABLE_SCHEMA = @db AND TABLE_NAME = 'price_triggers' AND COLUMN_NAME = 'product_id') > 0,
+        'SELECT ''skip: product_id exists'' AS info',
+        IF(
+            (SELECT COUNT(*) FROM information_schema.COLUMNS
+                WHERE TABLE_SCHEMA = @db AND TABLE_NAME = 'price_triggers' AND COLUMN_NAME = 'customer_id') > 0,
+            'ALTER TABLE `price_triggers` ADD COLUMN `product_id` BIGINT UNSIGNED NULL DEFAULT NULL COMMENT ''محصول هشدار'' AFTER `customer_id`, ADD INDEX `price_triggers_product_id_index` (`product_id`)',
+            'ALTER TABLE `price_triggers` ADD COLUMN `product_id` BIGINT UNSIGNED NULL DEFAULT NULL COMMENT ''محصول هشدار'', ADD INDEX `price_triggers_product_id_index` (`product_id`)'
+        )
+    )
+);
+PREPARE stmt FROM @sql;
+EXECUTE stmt;
+DEALLOCATE PREPARE stmt;

database/sql/deploy_safe_schema.sql

@@ -523,6 +523,38 @@ PREPARE stmt FROM @sql;
 EXECUTE stmt;
 DEALLOCATE PREPARE stmt;
 
+-- ---------------------------------------------------------------------------
+-- price_triggers.product_id (هشدار قیمت روی محصول)
+-- ---------------------------------------------------------------------------
+SET @sql = IF(
+    (SELECT COUNT(*) FROM information_schema.TABLES
+        WHERE TABLE_SCHEMA = @db AND TABLE_NAME = 'price_triggers') > 0
+    AND (SELECT COUNT(*) FROM information_schema.COLUMNS
+        WHERE TABLE_SCHEMA = @db AND TABLE_NAME = 'price_triggers' AND COLUMN_NAME = 'product_id') = 0,
+    IF(
+        (SELECT COUNT(*) FROM information_schema.COLUMNS
+            WHERE TABLE_SCHEMA = @db AND TABLE_NAME = 'price_triggers' AND COLUMN_NAME = 'customer_id') > 0,
+        'ALTER TABLE `price_triggers` ADD COLUMN `product_id` BIGINT UNSIGNED NULL DEFAULT NULL COMMENT ''محصول هشدار'' AFTER `customer_id`',
+        'ALTER TABLE `price_triggers` ADD COLUMN `product_id` BIGINT UNSIGNED NULL DEFAULT NULL COMMENT ''محصول هشدار'''
+    ),
+    'SELECT ''skip price_triggers.product_id'' AS info'
+);
+PREPARE stmt FROM @sql;
+EXECUTE stmt;
+DEALLOCATE PREPARE stmt;
+
+SET @sql = IF(
+    (SELECT COUNT(*) FROM information_schema.STATISTICS
+        WHERE TABLE_SCHEMA = @db AND TABLE_NAME = 'price_triggers' AND INDEX_NAME = 'price_triggers_product_id_index') = 0
+    AND (SELECT COUNT(*) FROM information_schema.COLUMNS
+        WHERE TABLE_SCHEMA = @db AND TABLE_NAME = 'price_triggers' AND COLUMN_NAME = 'product_id') > 0,
+    'ALTER TABLE `price_triggers` ADD INDEX `price_triggers_product_id_index` (`product_id`)',
+    'SELECT ''skip price_triggers.product_id index'' AS info'
+);
+PREPARE stmt FROM @sql;
+EXECUTE stmt;
+DEALLOCATE PREPARE stmt;
+
 -- ---------------------------------------------------------------------------
 -- پایان — برای بورس‌مس (اختیاری، جدا اجرا کنید):
 -- UPDATE `settings` SET `value` = 'کیلوگرم' WHERE `key` = 'unit';