add sidebar and various component

frontend/src/app/components/settings/settings.ts

@@ -0,0 +1,30 @@
+import { Component } from '@angular/core';
+import { CommonModule } from '@angular/common';
+
+@Component({
+  selector: 'app-settings',
+  standalone: true,
+  imports: [CommonModule],
+  templateUrl: './settings.html',
+  styleUrls: ['./settings.css']
+})
+export class SettingsComponent {
+  settings = {
+    theme: 'dark',
+    notifications: true,
+    autoRefresh: false,
+    refreshInterval: 30
+  };
+
+  toggleNotifications() {
+    this.settings.notifications = !this.settings.notifications;
+  }
+
+  toggleAutoRefresh() {
+    this.settings.autoRefresh = !this.settings.autoRefresh;
+  }
+
+  changeTheme(theme: string) {
+    this.settings.theme = theme;
+  }
+}