feat: Implement user authentication and database migration system

- Refactored AuthService to use UserRepository for user authentication.
- Added .env file for environment configuration.
- Created migration system with Migrator and ConnectionFactory classes.
- Added database migration files for creating users table.
- Implemented settings controller for managing database migrations.
- Developed user repository for user data handling.
- Created users controller for user management interface.
- Added frontend standards and migration documentation.
- Introduced reusable UI components and jQuery alerts module.

public/assets/css/login.css

@@ -1 +1 @@
-:root{--c-primary: #6690f4;--c-primary-dark: #3164db;--c-bg: #f4f6f9;--c-surface: #ffffff;--c-text: #4e5e6a;--c-text-strong: #2d3748;--c-border: #e2e8f0;--c-muted: #718096;--c-danger: #cc0000;--focus-ring: 0 0 0 3px rgba(102, 144, 244, 0.15);--shadow-card: 0 20px 50px rgba(22, 34, 58, 0.14)}*{box-sizing:border-box}html,body{min-height:100%}body{margin:0;font-family:"Roboto","Segoe UI",sans-serif;color:var(--c-text);background:var(--c-bg);overflow-x:hidden}.bg-orb{position:fixed;width:460px;height:460px;border-radius:999px;filter:blur(28px);z-index:0;opacity:.45;pointer-events:none}.bg-orb-left{top:-200px;left:-180px;background:radial-gradient(circle, rgba(102, 144, 244, 0.48) 0%, rgba(102, 144, 244, 0) 70%)}.bg-orb-right{right:-200px;bottom:-220px;background:radial-gradient(circle, rgba(30, 42, 58, 0.36) 0%, rgba(30, 42, 58, 0) 70%)}.login-page{min-height:100vh;display:grid;place-items:center;padding:32px 20px;position:relative;z-index:1}.login-card{width:100%;max-width:430px;background:var(--c-surface);border:1px solid var(--c-border);border-radius:12px;box-shadow:var(--shadow-card);padding:34px 30px 28px;animation:card-enter 420ms ease-out}.login-header{margin-bottom:24px}.login-badge{display:inline-block;margin:0 0 14px;padding:5px 12px;border-radius:999px;border:1px solid #d9e2ff;background:#eef2ff;color:#3f5faf;font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.06em}h1{margin:0;color:var(--c-text-strong);font-size:clamp(1.6rem,2.5vw,1.9rem);line-height:1.15;font-weight:700}.login-subtitle{margin:10px 0 0;font-size:15px;line-height:1.55;color:var(--c-muted)}.alert-error{margin-bottom:18px;padding:12px 14px;border-radius:8px;border:1px solid #fed7d7;background:#fff5f5;color:var(--c-danger);font-size:13px;min-height:44px}.alert-error-placeholder{opacity:.56}.login-form{display:grid;gap:16px}.form-field{display:grid;gap:7px}.field-label{color:var(--c-text-strong);font-size:13px;font-weight:600}input[type=email],input[type=password]{width:100%;height:46px;border:2px solid var(--c-border);border-radius:8px;padding:0 14px;font:inherit;color:var(--c-text-strong);background:#fff;transition:border-color .2s ease,box-shadow .2s ease}input[type=email]::placeholder,input[type=password]::placeholder{color:#cbd5e0}input[type=email]:focus,input[type=password]:focus{outline:none;border-color:var(--c-primary);box-shadow:var(--focus-ring)}.submit-btn{margin-top:2px;height:48px;border:0;border-radius:8px;font:inherit;font-size:15px;font-weight:600;color:#fff;background:var(--c-primary);cursor:pointer;transition:background-color .2s ease,transform .1s ease}.submit-btn:hover{background:var(--c-primary-dark)}.submit-btn:active{transform:translateY(1px)}.submit-btn:focus-visible{outline:none;box-shadow:var(--focus-ring)}@keyframes card-enter{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@media(max-width: 640px){.login-page{padding:18px 14px}.login-card{padding:24px 20px 20px}h1{font-size:1.55rem}}
+:root{--c-primary: #6690f4;--c-primary-dark: #3164db;--c-bg: #f4f6f9;--c-surface: #ffffff;--c-text: #4e5e6a;--c-text-strong: #2d3748;--c-muted: #718096;--c-border: #e2e8f0;--c-danger: #cc0000;--focus-ring: 0 0 0 3px rgba(102, 144, 244, 0.15);--shadow-card: 0 1px 4px rgba(0, 0, 0, 0.06)}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:38px;padding:8px 16px;border:1px solid rgba(0,0,0,0);border-radius:8px;font:inherit;font-weight:600;text-decoration:none;cursor:pointer;transition:background-color .2s ease,border-color .2s ease,color .2s ease,transform .1s ease}.btn--primary{color:#fff;background:var(--c-primary)}.btn--primary:hover{background:var(--c-primary-dark)}.btn--secondary{color:var(--c-text-strong);border-color:var(--c-border);background:var(--c-surface)}.btn--secondary:hover{border-color:#cbd5e0;background:#f8fafc}.btn--block{width:100%}.btn:active{transform:translateY(1px)}.btn:focus-visible{outline:none;box-shadow:var(--focus-ring);border-color:var(--c-primary)}.form-control{width:100%;min-height:38px;border:1px solid var(--c-border);border-radius:8px;padding:7px 12px;font:inherit;color:var(--c-text-strong);background:#fff;transition:border-color .2s ease,box-shadow .2s ease}.form-control:focus{outline:none;border-color:var(--c-primary);box-shadow:var(--focus-ring)}.alert{padding:12px 14px;border-radius:8px;border:1px solid rgba(0,0,0,0);font-size:13px;min-height:44px}.alert--danger{border-color:#fed7d7;background:#fff5f5;color:var(--c-danger)}.alert--success{border-color:#b7ebcf;background:#f0fff6;color:#0f6b39}.alert--warning{border-color:#f7dd8b;background:#fff8e8;color:#815500}.form-field{display:grid;gap:7px}.field-label{color:var(--c-text-strong);font-size:13px;font-weight:600}.table-wrap{width:100%;overflow-x:auto}.table{width:100%;border-collapse:collapse;background:var(--c-surface)}.table th,.table td{padding:10px 12px;border-bottom:1px solid var(--c-border);text-align:left}.table th{color:var(--c-text-strong);font-weight:700;background:#f8fafc}.pagination{display:flex;align-items:center;flex-wrap:wrap;gap:8px}.pagination__item{display:inline-flex;align-items:center;justify-content:center;min-width:36px;height:36px;padding:0 10px;border-radius:8px;border:1px solid var(--c-border);color:var(--c-text-strong);background:var(--c-surface);text-decoration:none;font-weight:600}.pagination__item:hover{border-color:#cbd5e0;background:#f8fafc}.pagination__item.is-active{border-color:var(--c-primary);color:var(--c-primary);background:#edf2ff}:root{--shadow-card: 0 20px 50px rgba(22, 34, 58, 0.14)}*{box-sizing:border-box}html,body{min-height:100%}body{margin:0;font-family:"Roboto","Segoe UI",sans-serif;color:var(--c-text);background:var(--c-bg);overflow-x:hidden}.bg-orb{position:fixed;width:460px;height:460px;border-radius:999px;filter:blur(28px);z-index:0;opacity:.45;pointer-events:none}.bg-orb-left{top:-200px;left:-180px;background:radial-gradient(circle, rgba(102, 144, 244, 0.48) 0%, rgba(102, 144, 244, 0) 70%)}.bg-orb-right{right:-200px;bottom:-220px;background:radial-gradient(circle, rgba(30, 42, 58, 0.36) 0%, rgba(30, 42, 58, 0) 70%)}.login-page{min-height:100vh;display:grid;place-items:center;padding:32px 20px;position:relative;z-index:1}.login-card{width:100%;max-width:430px;background:var(--c-surface);border:1px solid var(--c-border);border-radius:12px;box-shadow:var(--shadow-card);padding:34px 30px 28px;animation:card-enter 420ms ease-out}.login-header{margin-bottom:24px}.login-badge{display:inline-block;margin:0 0 14px;padding:5px 12px;border-radius:999px;border:1px solid #d9e2ff;background:#eef2ff;color:#3f5faf;font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.06em}h1{margin:0;color:var(--c-text-strong);font-size:clamp(1.6rem,2.5vw,1.9rem);line-height:1.15;font-weight:700}.login-subtitle{margin:10px 0 0;font-size:15px;line-height:1.55;color:var(--c-muted)}.login-alert{margin-bottom:18px}.login-alert-placeholder{opacity:.56}.login-form{display:grid;gap:16px}.form-field{display:grid;gap:7px}.field-label{color:var(--c-text-strong);font-size:13px;font-weight:600}.login-form .form-control{min-height:46px;padding:0 14px;border-width:2px}.login-form .form-control::placeholder{color:#cbd5e0}.login-submit{margin-top:2px;font-size:15px;min-height:48px}@keyframes card-enter{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@media(max-width: 640px){.login-page{padding:18px 14px}.login-card{padding:24px 20px 20px}h1{font-size:1.55rem}}

public/assets/css/modules/jquery-alerts.css

@@ -0,0 +1 @@
+.jq-alert{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:12px;padding:12px 14px;border:1px solid rgba(0,0,0,0);border-radius:8px;font-size:14px;opacity:0;transform:translateY(4px);transition:opacity .18s ease,transform .18s ease}.jq-alert.is-visible{opacity:1;transform:translateY(0)}.jq-alert--info{color:#1e3a8a;background:#eff6ff;border-color:#bfdbfe}.jq-alert--success{color:#065f46;background:#ecfdf5;border-color:#a7f3d0}.jq-alert--warning{color:#92400e;background:#fffbeb;border-color:#fde68a}.jq-alert--error{color:#991b1b;background:#fef2f2;border-color:#fecaca}.jq-alert__content{flex:1}.jq-alert__close{appearance:none;border:0;padding:0;line-height:1;font-size:18px;cursor:pointer;color:inherit;background:rgba(0,0,0,0)}

public/assets/js/modules/jquery-alerts.js

@@ -0,0 +1,72 @@
+"use strict";
+
+(function (factory) {
+  if (typeof module === "object" && module.exports) {
+    module.exports = factory;
+    return;
+  }
+
+  if (typeof window.jQuery !== "undefined") {
+    factory(window.jQuery);
+  }
+})(function ($) {
+  if (!$ || !$.fn) {
+    return;
+  }
+
+  const DEFAULTS = {
+    type: "info",
+    dismissible: true,
+    timeout: 0,
+    classPrefix: "jq-alert",
+  };
+
+  function removeAlert($el) {
+    $el.removeClass("is-visible");
+    window.setTimeout(function () {
+      $el.remove();
+    }, 180);
+  }
+
+  $.fn.orderProAlert = function (options) {
+    const settings = $.extend({}, DEFAULTS, options);
+
+    return this.each(function () {
+      const $host = $(this);
+      const $alert = $("<div>", {
+        class: settings.classPrefix + " " + settings.classPrefix + "--" + settings.type + " is-visible",
+        role: "alert",
+      });
+
+      const $content = $("<div>", {
+        class: settings.classPrefix + "__content",
+        text: String(settings.message || ""),
+      });
+
+      $alert.append($content);
+
+      if (settings.dismissible) {
+        const $close = $("<button>", {
+          class: settings.classPrefix + "__close",
+          type: "button",
+          "aria-label": "Close alert",
+          text: "x",
+        });
+
+        $close.on("click", function () {
+          removeAlert($alert);
+        });
+
+        $alert.append($close);
+      }
+
+      $host.append($alert);
+
+      if (settings.timeout > 0) {
+        window.setTimeout(function () {
+          removeAlert($alert);
+        }, settings.timeout);
+      }
+    });
+  };
+});