Fix @mutex decorator, text input, modal docs, group management polish

Add user groups feature, simplify flash alerts

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

database/migrations/.migration_whitelist

@@ -341,6 +341,11 @@
             "created_at": "2025-12-11T05:06:10+00:00",
             "created_by": "root",
             "command": "php artisan make:migration:safe create_login_history_table"
+        },
+        "2025_12_11_061551_create_groups_and_group_users_tables.php": {
+            "created_at": "2025-12-11T06:15:51+00:00",
+            "created_by": "root",
+            "command": "php artisan make:migration:safe create_groups_and_group_users_tables"
         }
     }
 }

database/migrations/2025_12_11_061551_create_groups_and_group_users_tables.php

@@ -0,0 +1,53 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Support\Facades\DB;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up()
+    {
+        // Create user_groups table
+        DB::statement("
+            CREATE TABLE user_groups (
+                id BIGINT NOT NULL AUTO_INCREMENT PRIMARY KEY,
+                site_id BIGINT NOT NULL,
+                name VARCHAR(100) NOT NULL,
+                description TEXT NULL,
+                deletion_protection TINYINT(1) NOT NULL DEFAULT 0,
+                deleted_at TIMESTAMP(3) NULL,
+                deleted_by BIGINT NULL,
+                created_at TIMESTAMP(3) NULL DEFAULT CURRENT_TIMESTAMP(3),
+                updated_at TIMESTAMP(3) NULL DEFAULT CURRENT_TIMESTAMP(3) ON UPDATE CURRENT_TIMESTAMP(3),
+                created_by BIGINT NULL,
+                updated_by BIGINT NULL,
+
+                INDEX user_groups_site_id_idx (site_id),
+                INDEX user_groups_name_idx (name),
+                INDEX user_groups_deleted_at_idx (deleted_at)
+            ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci
+        ");
+
+        // Create user_group_members pivot table (many-to-many)
+        DB::statement("
+            CREATE TABLE user_group_members (
+                id BIGINT NOT NULL AUTO_INCREMENT PRIMARY KEY,
+                user_group_id BIGINT NOT NULL,
+                user_id BIGINT NOT NULL,
+                created_at TIMESTAMP(3) NULL DEFAULT CURRENT_TIMESTAMP(3),
+                updated_at TIMESTAMP(3) NULL DEFAULT CURRENT_TIMESTAMP(3) ON UPDATE CURRENT_TIMESTAMP(3),
+                created_by BIGINT NULL,
+                updated_by BIGINT NULL,
+
+                INDEX user_group_members_group_id_idx (user_group_id),
+                INDEX user_group_members_user_id_idx (user_id),
+                UNIQUE INDEX user_group_members_unique (user_group_id, user_id),
+                CONSTRAINT user_group_members_group_fk FOREIGN KEY (user_group_id) REFERENCES user_groups(id) ON DELETE CASCADE,
+                CONSTRAINT user_group_members_user_fk FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
+            ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci
+        ");
+    }
+};