feat: Implement Dark Mode

Added styles and configurations to enable dark mode throughout the application. The dark mode features a deep blue color scheme for primary elements and improved visibility for cursor. Selected option text in mat-select now appears in white for better contrast. This enhancement provides users with the option to switch between light and dark modes seamlessly.

Changes:
- Added dark mode styles in the theme service
- Updated mifosx-theme.scss for dark mode customization
- Adjusted cursor visibility in dark mode
- Modified selected option text color in mat-select

Fixes #2021

Implemented the black-logo image into white-logo-image dynamically

src/app/core/shell/toolbar/toolbar.component.html

@@ -58,6 +58,10 @@
     <mifosx-notifications-tray fxHide.lt-md></mifosx-notifications-tray>
   </div>
 
+  <div #themeToggle>
+    <theme-toggle-component></theme-toggle-component>
+  </div>
+  
   <div #appMenu>
     <button mat-icon-button class="ml-1 img-button" [matMenuTriggerFor]="applicationMenu">
       <img src="assets/images/user_placeholder.png">

src/app/home/home.component.html

@@ -36,7 +36,7 @@
 
     </mat-card-content>
 
-    <img mat-card-image src="assets/images/mifos_lg-logo.jpg" alt="Mifos X">
+    <img mat-card-image src="assets/images/mifos_lg-logo.png" alt="Mifos X">
 
   </mat-card>
 

src/app/shared/shared.module.ts

@@ -22,6 +22,7 @@ import { SearchToolComponent } from './search-tool/search-tool.component';
 import { KeyboardShortcutsDialogComponent } from './keyboard-shortcuts-dialog/keyboard-shortcuts-dialog.component';
 import { ServerSelectorComponent } from './server-selector/server-selector.component';
 import { TenantSelectorComponent } from './tenant-selector/tenant-selector.component';
+import { ThemeToggleComponent } from '../theme-toggle/theme-toggle.component';
 
 /** Custom Modules */
 import { IconsModule } from './icons.module';
@@ -98,7 +99,8 @@ import { ViewSavingsAccountingDetailsComponent } from './accounting/view-savings
     StepperButtonsComponent,
     GlAccountSelectorComponent,
     GlAccountDisplayComponent,
-    ViewSavingsAccountingDetailsComponent
+    ViewSavingsAccountingDetailsComponent,
+    ThemeToggleComponent
   ],
   exports: [
     FileUploadComponent,
@@ -130,6 +132,7 @@ import { ViewSavingsAccountingDetailsComponent } from './accounting/view-savings
     GlAccountSelectorComponent,
     GlAccountDisplayComponent,
     ViewSavingsAccountingDetailsComponent,
+    ThemeToggleComponent,
   ]
 })
 export class SharedModule { }

src/app/theme-toggle/theme-toggle.component.html

@@ -0,0 +1,3 @@
+<button mat-icon-button (click)="toggleTheme()">
+    <mat-icon>{{ isDarkMode ? 'wb_sunny' : 'nights_stay' }}</mat-icon>
+</button>

src/app/theme-toggle/theme-toggle.component.spec.ts

@@ -0,0 +1,23 @@
+import { ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { ThemeToggleComponent } from './theme-toggle.component';
+
+describe('ThemeToggleComponent', () => {
+  let component: ThemeToggleComponent;
+  let fixture: ComponentFixture<ThemeToggleComponent>;
+
+  beforeEach(async () => {
+    await TestBed.configureTestingModule({
+      declarations: [ ThemeToggleComponent ]
+    })
+    .compileComponents();
+
+    fixture = TestBed.createComponent(ThemeToggleComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

src/app/theme-toggle/theme-toggle.component.ts

@@ -0,0 +1,20 @@
+import { Component } from '@angular/core';
+import { ThemeService } from '../theme.service';
+
+@Component({
+  selector: 'theme-toggle-component',
+  templateUrl: './theme-toggle.component.html',
+  styleUrls: ['./theme-toggle.component.scss'],
+})
+export class ThemeToggleComponent {
+  isDarkMode: boolean;
+
+  constructor(private themeService: ThemeService) {
+    this.isDarkMode = this.themeService.isDarkMode();
+  }
+
+  toggleTheme() {
+    this.isDarkMode = !this.isDarkMode;
+    this.themeService.setDarkMode(this.isDarkMode);
+  }
+}

src/app/theme.service.spec.ts

@@ -0,0 +1,16 @@
+import { TestBed } from '@angular/core/testing';
+
+import { ThemeService } from './theme.service';
+
+describe('ThemeService', () => {
+  let service: ThemeService;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({});
+    service = TestBed.inject(ThemeService);
+  });
+
+  it('should be created', () => {
+    expect(service).toBeTruthy();
+  });
+});

src/app/theme.service.ts

@@ -0,0 +1,21 @@
+import { Injectable } from '@angular/core';
+
+@Injectable({
+  providedIn: 'root',
+})
+export class ThemeService {
+  private darkMode = false;
+
+  isDarkMode() {
+    return this.darkMode;
+  }
+
+  setDarkMode(isDarkMode: boolean) {
+    this.darkMode = isDarkMode;
+    if (isDarkMode) {
+      document.body.classList.add('dark-theme');
+    } else {
+      document.body.classList.remove('dark-theme');
+    }
+  }
+}