Update various configuration files, components, and assets; enhance notification system and API endpoints; improve documentation and styles across the application.

database/migrations/004_create_notification_logs_table.sql

@@ -0,0 +1,22 @@
+-- Create notification logs table for audit trail
+CREATE TABLE IF NOT EXISTS `notification_logs` (
+  `id` VARCHAR(36) NOT NULL DEFAULT (UUID()),
+  `notification_id` VARCHAR(36) NULL,
+  `action` VARCHAR(50) NOT NULL,
+  `actor` VARCHAR(100) NULL,
+  `actor_id` VARCHAR(36) NULL,
+  `channel_type` VARCHAR(20) NULL,
+  `status` VARCHAR(30) NULL,
+  `details` TEXT NULL,
+  `source_ip` VARCHAR(50) NULL,
+  `error_code` VARCHAR(50) NULL,
+  `error_message` TEXT NULL,
+  `metadata` JSON NULL,
+  `created_at` TIMESTAMP NULL DEFAULT CURRENT_TIMESTAMP,
+  PRIMARY KEY (`id`),
+  INDEX `idx_notification_logs_notification_id` (`notification_id`),
+  INDEX `idx_notification_logs_action` (`action`),
+  INDEX `idx_notification_logs_created_at` (`created_at`),
+  INDEX `idx_notification_logs_status` (`status`),
+  INDEX `idx_notification_logs_channel_type` (`channel_type`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;