fix: update unit tests to match VacDay[] type structure

Co-authored-by: THoguet <61246905+THoguet@users.noreply.github.com>
Initial plan
2025-11-30 02:09:47 +00:00 · 2025-11-30 02:06:32 +00:00 · 2025-11-30 02:59:03 +01:00 · 2025-11-30 01:24:26 +01:00 · 2025-11-29 21:09:21 +01:00 · 2025-11-29 19:15:19 +01:00
52 changed files with 17102 additions and 15166 deletions
@@ -0,0 +1,34 @@
+version: 2
+updates:
+    # Enable version updates for npm
+    - package-ecosystem: 'npm'
+      directory: '/'
+      schedule:
+          interval: 'weekly'
+          day: 'monday'
+      open-pull-requests-limit: 10
+      groups:
+          angular:
+              patterns:
+                  - '@angular/*'
+          development-dependencies:
+              dependency-type: 'development'
+              update-types:
+                  - 'minor'
+                  - 'patch'
+
+    # Enable version updates for GitHub Actions
+    - package-ecosystem: 'github-actions'
+      directory: '/'
+      schedule:
+          interval: 'weekly'
+          day: 'monday'
+      open-pull-requests-limit: 5
+
+    # Enable version updates for Docker
+    - package-ecosystem: 'docker'
+      directory: '/'
+      schedule:
+          interval: 'weekly'
+          day: 'monday'
+      open-pull-requests-limit: 5
@@ -0,0 +1,41 @@
+name: CodeQL Security Analysis
+
+on:
+    push:
+        branches: [main]
+    pull_request:
+        branches: [main]
+    schedule:
+        - cron: '0 0 * * 1' # Run every Monday at midnight UTC
+
+jobs:
+    analyze:
+        name: Analyze Code
+        runs-on: ubuntu-latest
+        permissions:
+            security-events: write
+            actions: read
+            contents: read
+
+        strategy:
+            fail-fast: false
+            matrix:
+                language: ['javascript-typescript']
+
+        steps:
+            - name: Checkout repository
+              uses: actions/checkout@v4
+
+            - name: Initialize CodeQL
+              uses: github/codeql-action/init@v4
+              with:
+                  languages: ${{ matrix.language }}
+                  queries: security-extended,security-and-quality
+
+            - name: Autobuild
+              uses: github/codeql-action/autobuild@v4
+
+            - name: Perform CodeQL Analysis
+              uses: github/codeql-action/analyze@v4
+              with:
+                  category: '/language:${{matrix.language}}'
@@ -5,6 +5,7 @@ on:
        branches: [main]
    release:
        types: [published]
+    workflow_dispatch:

 jobs:
    build-and-push:
@@ -12,10 +13,14 @@ jobs:
        permissions:
            contents: read
            packages: write
+            security-events: write

        steps:
            - uses: actions/checkout@v4

+            - name: Set up Docker Buildx
+              uses: docker/setup-buildx-action@v3
+
            - name: Log in to GitHub Container Registry
              uses: docker/login-action@v3
              with:
@@ -33,11 +38,28 @@ jobs:
                      type=semver,pattern={{version}}
                      type=semver,pattern={{major}}.{{minor}}
                      type=sha
+                      type=raw,value=latest,enable={{is_default_branch}}

            - name: Build and push
-              uses: docker/build-push-action@v5
+              id: build
+              uses: docker/build-push-action@v6
              with:
                  context: .
                  push: true
                  tags: ${{ steps.meta.outputs.tags }}
                  labels: ${{ steps.meta.outputs.labels }}
+                  cache-from: type=gha
+                  cache-to: type=gha,mode=max
+
+            - name: Run Trivy vulnerability scanner
+              uses: aquasecurity/trivy-action@0.33.1
+              with:
+                  image-ref: ghcr.io/thoguet/vac-optimizer@${{ steps.build.outputs.digest }}
+                  format: 'sarif'
+                  output: 'trivy-results.sarif'
+
+            - name: Upload Trivy results to GitHub Security tab
+              uses: github/codeql-action/upload-sarif@v4
+              if: always()
+              with:
+                  sarif_file: 'trivy-results.sarif'
@@ -0,0 +1,105 @@
+name: PR Validation
+
+on:
+    pull_request:
+        branches: [main]
+    push:
+        branches: [main]
+
+jobs:
+    lint:
+        name: Lint Check
+        runs-on: ubuntu-latest
+        steps:
+            - uses: actions/checkout@v4
+
+            - name: Setup Node.js
+              uses: actions/setup-node@v6
+              with:
+                  node-version: '20'
+                  cache: 'npm'
+
+            - name: Install dependencies
+              run: npm ci --legacy-peer-deps
+
+            - name: Check code formatting with Prettier
+              run: npx prettier --check "src/**/*.{ts,html,scss,css,json}"
+
+            - name: Run ESLint
+              run: npx eslint "src/**/*.ts"
+
+    type-check:
+        name: TypeScript Type Check
+        runs-on: ubuntu-latest
+        steps:
+            - uses: actions/checkout@v4
+
+            - name: Setup Node.js
+              uses: actions/setup-node@v6
+              with:
+                  node-version: '20'
+                  cache: 'npm'
+
+            - name: Install dependencies
+              run: npm ci --legacy-peer-deps
+
+            - name: Run TypeScript compiler
+              run: npx tsc --noEmit
+
+    test:
+        name: Unit Tests
+        runs-on: ubuntu-latest
+        steps:
+            - uses: actions/checkout@v4
+
+            - name: Setup Node.js
+              uses: actions/setup-node@v6
+              with:
+                  node-version: '20'
+                  cache: 'npm'
+
+            - name: Install dependencies
+              run: npm ci --legacy-peer-deps
+
+            - name: Run unit tests
+              run: npm test -- --watch=false --browsers=ChromeHeadless --code-coverage
+
+            - name: Upload coverage reports
+              uses: codecov/codecov-action@v5
+              if: always()
+              with:
+                  token: ${{ secrets.CODECOV_TOKEN }}
+                  files: ./coverage/vac-optimizer/lcov.info
+                  fail_ci_if_error: false
+
+    build:
+        name: Build Application
+        runs-on: ubuntu-latest
+        steps:
+            - uses: actions/checkout@v4
+
+            - name: Setup Node.js
+              uses: actions/setup-node@v6
+              with:
+                  node-version: '20'
+                  cache: 'npm'
+
+            - name: Install dependencies
+              run: npm ci --legacy-peer-deps
+
+            - name: Build production bundle
+              run: npm run build -- --configuration production
+              env:
+                  NG_BUILD_CACHE: '.angular/cache'
+
+            - name: Check bundle size
+              run: |
+                  du -sh dist/vac-optimizer/browser
+                  echo "Build completed successfully"
+
+            - name: Upload build artifacts
+              uses: actions/upload-artifact@v5
+              with:
+                  name: build-artifacts
+                  path: dist/
+                  retention-days: 7
@@ -1,5 +1,5 @@
 # Stage 1: Build the Angular application
-FROM node:20-alpine AS builder
+FROM node:25-alpine AS builder

 # Set working directory
 WORKDIR /app
@@ -17,7 +17,7 @@ COPY . .
 RUN npm run build

 # Stage 2: Production image
-FROM node:20-alpine AS production
+FROM node:25-alpine AS production

 # Set working directory
 WORKDIR /app
@@ -12,6 +12,38 @@ ng serve

 Once the server is running, open your browser and navigate to `http://localhost:4200/`. The application will automatically reload whenever you modify any of the source files.

+## Code Quality
+
+This project uses ESLint and Prettier to maintain code quality and consistency.
+
+### Linting
+
+Check for linting errors:
+
+```bash
+npm run lint
+```
+
+Auto-fix linting issues:
+
+```bash
+npm run lint:fix
+```
+
+### Formatting
+
+Check code formatting:
+
+```bash
+npm run format:check
+```
+
+Format code:
+
+```bash
+npm run format
+```
+
 ## Code scaffolding

 Angular CLI includes powerful code scaffolding tools. To generate a new component, run:
@@ -54,6 +86,15 @@ ng e2e

 Angular CLI does not come with an end-to-end testing framework by default. You can choose one that suits your needs.

+## CI/CD
+
+This project uses GitHub Actions for continuous integration and deployment:
+
+- **PR Validation**: Automatically runs on pull requests to validate code quality, run tests, and build the application
+- **Docker Build & Push**: Builds and publishes Docker images to GitHub Container Registry on main branch pushes and releases
+- **CodeQL Analysis**: Runs security analysis weekly and on pull requests
+- **Dependabot**: Automatically updates dependencies weekly
+
 ## Additional Resources

 For more information on using the Angular CLI, including detailed command references, visit the [Angular CLI Overview and Command Reference](https://angular.dev/tools/cli) page.
@@ -52,7 +52,10 @@
 									"maximumError": "16kB"
 								}
 							],
-							"outputHashing": "all"
+							"outputHashing": "all",
+							"optimization": {
+								"fonts": false
+							}
 						},
 						"development": {
 							"optimization": false,
@@ -0,0 +1,34 @@
+import eslintJs from '@eslint/js';
+import tseslint from 'typescript-eslint';
+import prettier from 'eslint-config-prettier';
+import prettierPlugin from 'eslint-plugin-prettier';
+
+export default [
+    eslintJs.configs.recommended,
+    ...tseslint.configs.recommended,
+    prettier,
+    {
+        files: ['**/*.ts'],
+        plugins: {
+            prettier: prettierPlugin,
+        },
+        languageOptions: {
+            parserOptions: {
+                projectService: true,
+                tsconfigRootDir: import.meta.dirname,
+            },
+        },
+        rules: {
+            'prettier/prettier': 'error',
+            '@typescript-eslint/no-explicit-any': 'warn',
+            '@typescript-eslint/explicit-function-return-type': 'off',
+            '@typescript-eslint/no-unused-vars': [
+                'error',
+                { argsIgnorePattern: '^_', varsIgnorePattern: '^_' },
+            ],
+        },
+    },
+    {
+        ignores: ['dist/**', 'node_modules/**', '.angular/**', 'coverage/**'],
+    },
+];
@@ -1,64 +1,71 @@
 {
-	"name": "vac-optimizer",
-	"version": "1.5.0",
-	"scripts": {
-		"ng": "ng",
-		"start": "ng serve",
-		"build": "ng build",
-		"watch": "ng build --watch --configuration development",
-		"test": "ng test",
-		"serve:ssr:vac-optimizer": "node dist/vac-optimizer/server/server.mjs"
-	},
-	"prettier": {
-		"printWidth": 100,
-		"singleQuote": true,
-		"overrides": [
-			{
-				"files": "*.html",
-				"options": {
-					"parser": "angular"
-				}
-			}
-		]
-	},
-	"private": true,
-	"dependencies": {
-		"@angular/cdk": "^20.2.10",
-		"@angular/common": "^20.3.0",
-		"@angular/compiler": "^20.3.0",
-		"@angular/core": "^20.3.7",
-		"@angular/forms": "^20.3.0",
-		"@angular/material": "^20.2.10",
-		"@angular/platform-browser": "^20.3.0",
-		"@angular/platform-server": "^20.3.0",
-		"@angular/router": "^20.3.0",
-		"@angular/ssr": "^20.3.7",
-		"date-holidays": "^3.26.2",
-		"dayjs": "^1.11.19",
-		"express": "^5.1.0",
-		"rxjs": "~7.8.0",
-		"tslib": "^2.3.0"
-	},
-	"devDependencies": {
-		"@angular/build": "^20.3.7",
-		"@angular/cli": "^20.3.7",
-		"@angular/compiler-cli": "^20.3.0",
-		"@types/express": "^5.0.1",
-		"@types/jasmine": "~5.1.0",
-		"@types/jest": "^30.0.0",
-		"@types/node": "^20.17.19",
-		"eslint": "^9.38.0",
-		"eslint-config-prettier": "^10.1.8",
-		"eslint-plugin-prettier": "^5.5.4",
-		"jasmine-core": "~5.9.0",
-		"jest": "^30.2.0",
-		"jest-preset-angular": "^15.0.3",
-		"karma": "~6.4.0",
-		"karma-chrome-launcher": "~3.2.0",
-		"karma-coverage": "~2.2.0",
-		"karma-jasmine": "~5.1.0",
-		"karma-jasmine-html-reporter": "~2.1.0",
-		"prettier": "^3.6.2",
-		"typescript": "~5.9.2"
-	}
+  "name": "vac-optimizer",
+  "version": "1.5.0",
+  "scripts": {
+    "ng": "ng",
+    "start": "ng serve",
+    "build": "ng build",
+    "watch": "ng build --watch --configuration development",
+    "test": "ng test",
+    "serve:ssr:vac-optimizer": "node dist/vac-optimizer/server/server.mjs",
+    "lint": "eslint \"src/**/*.ts\"",
+    "lint:fix": "eslint \"src/**/*.ts\" --fix",
+    "format": "prettier --write \"src/**/*.{ts,html,scss,css,json}\"",
+    "format:check": "prettier --check \"src/**/*.{ts,html,scss,css,json}\""
+  },
+  "prettier": {
+    "printWidth": 100,
+    "singleQuote": true,
+    "overrides": [
+      {
+        "files": "*.html",
+        "options": {
+          "parser": "angular"
+        }
+      }
+    ]
+  },
+  "private": true,
+  "dependencies": {
+    "@angular/animations": "^21.0.1",
+    "@angular/cdk": "^21.0.1",
+    "@angular/common": "^21.0.1",
+    "@angular/compiler": "^21.0.1",
+    "@angular/core": "^21.0.1",
+    "@angular/forms": "^21.0.1",
+    "@angular/material": "^21.0.1",
+    "@angular/platform-browser": "^21.0.1",
+    "@angular/platform-server": "^21.0.1",
+    "@angular/router": "^21.0.1",
+    "@angular/ssr": "^21.0.1",
+    "date-holidays": "^3.26.2",
+    "dayjs": "^1.11.19",
+    "express": "^5.1.0",
+    "rxjs": "~7.8.0",
+    "tslib": "^2.3.0"
+  },
+  "devDependencies": {
+    "@angular/build": "^21.0.1",
+    "@angular/cli": "^21.0.1",
+    "@angular/compiler-cli": "^21.0.1",
+    "@eslint/js": "^9.39.1",
+    "@types/express": "^5.0.1",
+    "@types/jasmine": "~5.1.0",
+    "@types/jest": "^30.0.0",
+    "@types/node": "^24.10.0",
+    "eslint": "^9.39.1",
+    "eslint-config-prettier": "^10.1.8",
+    "eslint-plugin-prettier": "^5.5.4",
+    "jasmine-core": "~5.12.1",
+    "jest": "^30.2.0",
+    "jest-preset-angular": "^15.0.3",
+    "karma": "~6.4.0",
+    "karma-chrome-launcher": "~3.2.0",
+    "karma-coverage": "~2.2.0",
+    "karma-jasmine": "~5.1.0",
+    "karma-jasmine-html-reporter": "~2.1.0",
+    "prettier": "^3.6.2",
+    "typescript": "~5.9.2",
+    "typescript-eslint": "^8.46.4"
+  }
 }
@@ -4,9 +4,7 @@ import { appConfig } from './app.config';
 import { serverRoutes } from './app.routes.server';

 const serverConfig: ApplicationConfig = {
-	providers: [
-		provideServerRendering(withRoutes(serverRoutes))
-	]
+	providers: [provideServerRendering(withRoutes(serverRoutes))],
 };

 export const config = mergeApplicationConfig(appConfig, serverConfig);
@@ -11,6 +11,7 @@ import {
 	withEventReplay,
 	withIncrementalHydration,
 } from '@angular/platform-browser';
+import { provideAnimationsAsync } from '@angular/platform-browser/animations/async';

 export const appConfig: ApplicationConfig = {
 	providers: [
@@ -18,5 +19,6 @@ export const appConfig: ApplicationConfig = {
 		provideZonelessChangeDetection(),
 		provideRouter(routes),
 		provideClientHydration(withEventReplay(), withIncrementalHydration()),
+		provideAnimationsAsync(),
 	],
 };
@@ -3,6 +3,6 @@ import { RenderMode, ServerRoute } from '@angular/ssr';
 export const serverRoutes: ServerRoute[] = [
 	{
 		path: '**',
-		renderMode: RenderMode.Client
-	}
+		renderMode: RenderMode.Client,
+	},
 ];
@@ -6,7 +6,7 @@ describe('App', () => {
 	beforeEach(async () => {
 		await TestBed.configureTestingModule({
 			imports: [App],
-			providers: [provideZonelessChangeDetection()]
+			providers: [provideZonelessChangeDetection()],
 		}).compileComponents();
 	});

@@ -20,6 +20,6 @@ describe('App', () => {
 		const fixture = TestBed.createComponent(App);
 		fixture.detectChanges();
 		const compiled = fixture.nativeElement as HTMLElement;
-		expect(compiled.querySelector('h1')?.textContent).toContain('Hello, vac-optimizer');
+		expect(compiled.querySelector('h1')?.textContent).toContain('vac-optimizer');
 	});
 });
@@ -1,4 +1,4 @@
-import { ChangeDetectionStrategy, Component, model, signal } from '@angular/core';
+import { ChangeDetectionStrategy, Component, signal } from '@angular/core';
 import { MatDatepickerModule } from '@angular/material/datepicker';
 import { provideNativeDateAdapter } from '@angular/material/core';
 import { MatDivider } from '@angular/material/divider';
@@ -2,7 +2,7 @@
 	<h3>{{ getMonthName() }} {{ year }}</h3>
 	<div>
 		<div class="row header">
-			@if (calendarSettingsService.showWeekNumbers()) {
+			@if (calendarSettingsService.get('showWeekNumbers')()) {
 				<p class="day empty week-number"></p>
 			}
 			<p class="day">L</p>
@@ -16,7 +16,7 @@
 		<div class="cols">
 			@for (week of weeksInAMonth; track $index) {
 				<div class="row week">
-					@if (calendarSettingsService.showWeekNumbers()) {
+					@if (calendarSettingsService.get('showWeekNumbers')()) {
 						<p
 							class="day week-number"
 							[class.start]="$index === 0"
@@ -38,7 +38,6 @@
 								class="day number"
 								[matTooltip]="selectedDates.getTooltip(day)"
 								[matTooltipShowDelay]="500"
-								[matTooltipTouchGestures]="'on'"
 							>
 								{{ day.getDate() }}
 							</p>
@@ -1,23 +1,23 @@
 import { ComponentFixture, TestBed } from '@angular/core/testing';
-
+import { provideZonelessChangeDetection } from '@angular/core';
 import { CalendarMonth } from './calendar-month';

 describe('CalendarMonth', () => {
-  let component: CalendarMonth;
-  let fixture: ComponentFixture<CalendarMonth>;
+	let component: CalendarMonth;
+	let fixture: ComponentFixture<CalendarMonth>;

-  beforeEach(async () => {
-    await TestBed.configureTestingModule({
-      imports: [CalendarMonth]
-    })
-    .compileComponents();
+	beforeEach(async () => {
+		await TestBed.configureTestingModule({
+			imports: [CalendarMonth],
+			providers: [provideZonelessChangeDetection()],
+		}).compileComponents();

-    fixture = TestBed.createComponent(CalendarMonth);
-    component = fixture.componentInstance;
-    fixture.detectChanges();
-  });
+		fixture = TestBed.createComponent(CalendarMonth);
+		component = fixture.componentInstance;
+		fixture.detectChanges();
+	});

-  it('should create', () => {
-    expect(component).toBeTruthy();
-  });
+	it('should create', () => {
+		expect(component).toBeTruthy();
+	});
 });
@@ -1,7 +1,8 @@
-import { Component, Input, OnInit } from '@angular/core';
+import { Component, Input, OnInit, inject } from '@angular/core';
 import { CalendarService, Month, monthNames, SelectedDates } from '../../services/calendar-service';
 import { MatTooltip } from '@angular/material/tooltip';
 import { CalendarSettingsService } from '../../services/calendar-settings-service';
+import { DateCacheService } from '../../services/date-cache.service';

@Component({
 	selector: 'app-calendar-month',
@@ -10,7 +11,8 @@ import { CalendarSettingsService } from '../../services/calendar-settings-servic
 	styleUrl: './calendar-month.scss',
 })
 export class CalendarMonth implements OnInit {
-	constructor(protected calendarSettingsService: CalendarSettingsService) {}
+	protected calendarSettingsService = inject(CalendarSettingsService);
+	private dateCache = inject(DateCacheService);

 	@Input({ required: true })
 	monthIndex!: number;
@@ -18,10 +20,9 @@ export class CalendarMonth implements OnInit {
 	@Input({ required: true })
 	year!: number;

+	// Use DateCacheService instead of creating Date objects
 	getNow(): Date {
-		const now = new Date();
-		now.setHours(0, 0, 0, 0);
-		return now;
+		return this.dateCache.getNow();
 	}

 	currentMonth: Date = new Date();
@@ -1,23 +1,23 @@
 import { ComponentFixture, TestBed } from '@angular/core/testing';
-
+import { provideZonelessChangeDetection } from '@angular/core';
 import { CalendarSettings } from './calendar-settings';

 describe('CalendarSettings', () => {
-  let component: CalendarSettings;
-  let fixture: ComponentFixture<CalendarSettings>;
+	let component: CalendarSettings;
+	let fixture: ComponentFixture<CalendarSettings>;

-  beforeEach(async () => {
-    await TestBed.configureTestingModule({
-      imports: [CalendarSettings]
-    })
-    .compileComponents();
+	beforeEach(async () => {
+		await TestBed.configureTestingModule({
+			imports: [CalendarSettings],
+			providers: [provideZonelessChangeDetection()],
+		}).compileComponents();

-    fixture = TestBed.createComponent(CalendarSettings);
-    component = fixture.componentInstance;
-    fixture.detectChanges();
-  });
+		fixture = TestBed.createComponent(CalendarSettings);
+		component = fixture.componentInstance;
+		fixture.detectChanges();
+	});

-  it('should create', () => {
-    expect(component).toBeTruthy();
-  });
+	it('should create', () => {
+		expect(component).toBeTruthy();
+	});
 });
@@ -1,7 +1,7 @@
 import { Component } from '@angular/core';
-import { MatButton, MatButtonModule } from '@angular/material/button';
+import { MatButtonModule } from '@angular/material/button';
 import { MatDialog } from '@angular/material/dialog';
-import { MatIcon, MatIconModule } from '@angular/material/icon';
+import { MatIconModule } from '@angular/material/icon';
 import { CalendarSettingsDialog } from '../dialog/calendar-settings-dialog/calendar-settings-dialog';
 import { MatDividerModule } from '@angular/material/divider';

@@ -1,17 +1,24 @@
 <div class="calendar-year">
 	@if (isLoading()) {
-	<div class="loading-overlay">
-		<div class="loading-spinner">
-			<mat-spinner></mat-spinner>
-			<p>Calcul en cours...</p>
+		<div class="loading-overlay">
+			<div class="loading-spinner">
+				<div class="spinner-container">
+					<mat-spinner [mode]="'determinate'" [value]="loadingProgress()"></mat-spinner>
+					<div class="spinner-text">{{ loadingProgress() }}%</div>
+				</div>
+				<p>Calcul en cours...</p>
+			</div>
 		</div>
-	</div>
 	}
 	@for (month of months; track $index) {
-	<mat-card class="card">
-		<mat-card-content>
-			<app-calendar-month [monthIndex]="month" [year]="getYear(month)" [selectedDates]="selectedDates"></app-calendar-month>
-		</mat-card-content>
-	</mat-card>
+		<mat-card class="card">
+			<mat-card-content>
+				<app-calendar-month
+					[monthIndex]="month"
+					[year]="getYear(month)"
+					[selectedDates]="selectedDates"
+				></app-calendar-month>
+			</mat-card-content>
+		</mat-card>
 	}
 </div>
@@ -51,20 +51,32 @@
 	}
 }

+.spinner-container {
+	position: relative;
+	display: inline-block;
+
+	::ng-deep .mat-mdc-progress-spinner {
+		// Override Material spinner size
+		width: 100px;
+		height: 100px;
+	}
+
+	.spinner-text {
+		position: absolute;
+		top: 50%;
+		left: 50%;
+		transform: translate(-50%, -50%);
+		font-size: 20px;
+		font-weight: bold;
+		color: #333;
+		pointer-events: none;
+
+		@media (prefers-color-scheme: dark) {
+			color: #ddd;
+		}
+	}
+}
+
 .card {
 	margin: 16px;
 }
-
-@keyframes spin {
-	0% {
-		transform: rotate(0deg);
-	}
-
-	100% {
-		transform: rotate(360deg);
-	}
-}
-
-:root {
-	@include mat.progress-spinner-overrides((size: 0.5rem, active-indicator-width: 0.25rem));
-}
@@ -1,23 +1,23 @@
 import { ComponentFixture, TestBed } from '@angular/core/testing';
-
+import { provideZonelessChangeDetection } from '@angular/core';
 import { CalendarYear } from './calendar-year';

 describe('CalendarYear', () => {
-  let component: CalendarYear;
-  let fixture: ComponentFixture<CalendarYear>;
+	let component: CalendarYear;
+	let fixture: ComponentFixture<CalendarYear>;

-  beforeEach(async () => {
-    await TestBed.configureTestingModule({
-      imports: [CalendarYear]
-    })
-    .compileComponents();
+	beforeEach(async () => {
+		await TestBed.configureTestingModule({
+			imports: [CalendarYear],
+			providers: [provideZonelessChangeDetection()],
+		}).compileComponents();

-    fixture = TestBed.createComponent(CalendarYear);
-    component = fixture.componentInstance;
-    fixture.detectChanges();
-  });
+		fixture = TestBed.createComponent(CalendarYear);
+		component = fixture.componentInstance;
+		fixture.detectChanges();
+	});

-  it('should create', () => {
-    expect(component).toBeTruthy();
-  });
+	it('should create', () => {
+		expect(component).toBeTruthy();
+	});
 });
@@ -1,57 +1,76 @@
-import { Component, effect, signal } from '@angular/core';
+import { Component, effect, signal, inject } from '@angular/core';
 import { UserInputService } from '../../services/user-input-service';
 import { MatCard, MatCardContent } from '@angular/material/card';
 import { CalendarMonth } from '../calendar-month/calendar-month';
 import { CalendarService, SelectedDates } from '../../services/calendar-service';
-import { CommonModule } from '@angular/common';
+
 import { MatProgressSpinner } from '@angular/material/progress-spinner';
 import { CalendarSettingsService } from '../../services/calendar-settings-service';
+import { DateCacheService } from '../../services/date-cache.service';

@Component({
 	selector: 'app-calendar-year',
-	imports: [MatCard, CalendarMonth, MatCardContent, CommonModule, MatProgressSpinner],
+	imports: [MatCard, CalendarMonth, MatCardContent, MatProgressSpinner],
 	templateUrl: './calendar-year.html',
 	styleUrl: './calendar-year.scss',
 })
 export class CalendarYear {
-	protected isLoading = signal(true);
+	private dateCache = inject(DateCacheService);
+	private userInput = inject(UserInputService);
+	private calendarService = inject(CalendarService);
+	private calendarSettingsService = inject(CalendarSettingsService);

-	constructor(
-		private userInput: UserInputService,
-		private calendarService: CalendarService,
-		private calendarSettingsService: CalendarSettingsService,
-	) {
+	protected isLoading = signal(true);
+	protected loadingProgress = signal(0);
+
+	// Use DateCacheService instead of creating Date objects
+	private get currentMonth() {
+		return this.dateCache.getCurrentMonth();
+	}
+
+	private get currentYear() {
+		return this.dateCache.getCurrentYear();
+	}
+
+	constructor() {
 		effect(() => {
 			this.selectedDates = this.calendarService.getSelectedDatesForYear();
 			const vacationData = this.userInput.vacationNumberSignal();
-			const c = this.calendarSettingsService.samediMalin();
+			const c = this.calendarSettingsService.get('samediMalin')();
 			console.log('Samedi Malin setting:', c);
 			console.log('Optimizing vacations with data:', vacationData);
 			this.isLoading.set(true);
-			// Simulate server-side calculation with a small delay
-			setTimeout(() => {
-				if (this.selectedDates) {
-					// Create a copy to avoid mutating the original signal data
-					this.selectedDates.optimizeVacations(
-						{ ...vacationData },
-						this.calendarSettingsService,
-					);
-				}
-				this.isLoading.set(false);
-			}, 1);
+			this.loadingProgress.set(0);
+			// Defer execution to allow UI to update
+			queueMicrotask(() => {
+				void (async () => {
+					if (this.selectedDates) {
+						// Create a deep copy to avoid mutating the original signal data
+						const vacationDaysCopy = vacationData.map((vd) => ({ ...vd }));
+						const remainingDays = await this.selectedDates.optimizeVacations(
+							vacationDaysCopy,
+							this.calendarSettingsService,
+							this.calendarService,
+							(progress: number) => {
+								this.loadingProgress.set(progress);
+							},
+						);
+						// Update the remaining vacation days signal
+						this.userInput.remainingVacationDaysSignal.set(remainingDays);
+					}
+					this.isLoading.set(false);
+				})();
+			});
 		});
 	}

 	protected selectedDates: SelectedDates = new SelectedDates();

 	getYear(monthIndex: number): number {
-		const offset = new Date().getMonth() <= monthIndex ? 0 : 1;
-		return new Date().getFullYear() + offset;
+		const offset = this.currentMonth <= monthIndex ? 0 : 1;
+		return this.currentYear + offset;
 	}

-	// months starting from actual date
-	protected months: number[] = Array.from(
-		{ length: 12 },
-		(_, i) => (new Date().getMonth() + i) % 12,
-	);
+	// months starting from actual date - cache this array
+	protected months: number[] = Array.from({ length: 12 }, (_, i) => (this.currentMonth + i) % 12);
 }
@@ -1,5 +1,5 @@
 import { ComponentFixture, TestBed } from '@angular/core/testing';
-
+import { provideZonelessChangeDetection } from '@angular/core';
 import { DarkLightModeButton } from './dark-light-mode-button';

 describe('DarkLightModeButton', () => {
@@ -9,6 +9,7 @@ describe('DarkLightModeButton', () => {
 	beforeEach(async () => {
 		await TestBed.configureTestingModule({
 			imports: [DarkLightModeButton],
+			providers: [provideZonelessChangeDetection()],
 		}).compileComponents();

 		fixture = TestBed.createComponent(DarkLightModeButton);
@@ -4,26 +4,18 @@
 		<p>Configure your calendar settings here.</p>
 	</div>
 	<div style="display: flex; flex-direction: column; gap: 1rem">
-		<div style="align-self: flex-start">
-			<mat-slide-toggle
-				id="showWeekNumbers"
-				name="showWeekNumbers"
-				[checked]="calendarSettingsService.showWeekNumbers()"
-				(change)="calendarSettingsService.showWeekNumbers.set($event.checked)"
-			>
-				Afficher les numéros de semaine
-			</mat-slide-toggle>
-		</div>
-		<div style="align-self: flex-start">
-			<mat-slide-toggle
-				id="samediMalin"
-				name="samediMalin"
-				[checked]="calendarSettingsService.samediMalin()"
-				(change)="calendarSettingsService.samediMalin.set($event.checked)"
-			>
-				Activer le Samedi Malin
-			</mat-slide-toggle>
-		</div>
+		@for (setting of calendarSettingsService.settingsArray; track setting.id) {
+			<div style="align-self: flex-start">
+				<mat-slide-toggle
+					[id]="setting.id"
+					[name]="setting.id"
+					[checked]="setting.signal()"
+					(change)="setting.signal.set($event.checked)"
+				>
+					{{ setting.description }}
+				</mat-slide-toggle>
+			</div>
+		}
 	</div>
 	<button mat-button (click)="closeDialog()">Fermer</button>
 </div>
@@ -1,23 +1,41 @@
 import { ComponentFixture, TestBed } from '@angular/core/testing';
-
+import { provideZonelessChangeDetection } from '@angular/core';
+import { MatDialogRef } from '@angular/material/dialog';
 import { CalendarSettingsDialog } from './calendar-settings-dialog';

 describe('CalendarSettingsDialog', () => {
-  let component: CalendarSettingsDialog;
-  let fixture: ComponentFixture<CalendarSettingsDialog>;
+	let component: CalendarSettingsDialog;
+	let fixture: ComponentFixture<CalendarSettingsDialog>;

-  beforeEach(async () => {
-    await TestBed.configureTestingModule({
-      imports: [CalendarSettingsDialog]
-    })
-    .compileComponents();
+	beforeEach(async () => {
+		await TestBed.configureTestingModule({
+			imports: [CalendarSettingsDialog],
+			providers: [
+				provideZonelessChangeDetection(),
+				{
+					provide: MatDialogRef,
+					useValue: {
+						close: jasmine.createSpy('close'),
+					},
+				},
+			],
+		}).compileComponents();

-    fixture = TestBed.createComponent(CalendarSettingsDialog);
-    component = fixture.componentInstance;
-    fixture.detectChanges();
-  });
+		fixture = TestBed.createComponent(CalendarSettingsDialog);
+		component = fixture.componentInstance;
+		fixture.detectChanges();
+	});

-  it('should create', () => {
-    expect(component).toBeTruthy();
-  });
+	it('should create', () => {
+		expect(component).toBeTruthy();
+	});
+
+	it('should have calendar settings service', () => {
+		expect(component['calendarSettingsService']).toBeDefined();
+	});
+
+	it('should close dialog when closeDialog is called', () => {
+		component.closeDialog();
+		expect(component.dialogRef.close).toHaveBeenCalled();
+	});
 });
@@ -1,10 +1,8 @@
-import { Component } from '@angular/core';
+import { Component, inject } from '@angular/core';
 import { MatButton } from '@angular/material/button';
-import { MatCheckbox } from '@angular/material/checkbox';
 import { MatDialogRef } from '@angular/material/dialog';
 import { CalendarSettingsService } from '../../../services/calendar-settings-service';
 import { MatSlideToggle } from '@angular/material/slide-toggle';
-import { CdkFixedSizeVirtualScroll } from '@angular/cdk/scrolling';

@Component({
 	selector: 'app-calendar-settings-dialog',
@@ -13,10 +11,8 @@ import { CdkFixedSizeVirtualScroll } from '@angular/cdk/scrolling';
 	styleUrl: './calendar-settings-dialog.scss',
 })
 export class CalendarSettingsDialog {
-	constructor(
-		public dialogRef: MatDialogRef<CalendarSettingsDialog>,
-		protected calendarSettingsService: CalendarSettingsService,
-	) {}
+	public readonly dialogRef = inject<MatDialogRef<CalendarSettingsDialog>>(MatDialogRef);
+	protected readonly calendarSettingsService = inject(CalendarSettingsService);

 	closeDialog() {
 		this.dialogRef.close();
@@ -1,18 +1,40 @@
 <div class="user-input">
 	<p>Optimisez vos jours de vacances en fonction des jours fériés et des week-ends !</p>
-	<form [formGroup]="userInputForm">
-		<mat-form-field appearance="fill">
-			<mat-label>Combien de CP par an ?</mat-label>
-			<input matInput type="number" max="365" min="0" formControlName="CP" />
-		</mat-form-field>
-		<mat-form-field appearance="fill">
-			<mat-label>Combien de jours de RTT par an ?</mat-label>
-			<input matInput type="number" max="365" min="0" formControlName="RTT" />
-		</mat-form-field>
-		<mat-form-field appearance="fill">
-			<mat-label>Autres jours</mat-label>
-			<input matInput type="number" max="365" min="0" formControlName="Others" />
-		</mat-form-field>
-	</form>
-	<app-calendar-settings></app-calendar-settings>
+	<div class="listOfDays">
+		@for (day of daysOff; track day.id) {
+			<div class="day-input-wrapper" animate.enter="day-enter" animate.leave="day-leave">
+				<app-day-input [day]="day" (dayChange)="updateDay($index, $event)" (deleteEntry)="removeFromList($index)"></app-day-input>
+			</div>
+		}
+		<mat-card class="add-day-card mat-elevation-z2" (click)="addDay()">
+			<button matFab aria-label="Add entry">
+				<mat-icon>add</mat-icon>
+			</button>
+			<h3>Ajouter un jour de vacances</h3>
+		</mat-card>
+	</div>
+	<div class="action-buttons">
+		<button matFab extended (click)="triggerComputation()">
+			<mat-icon>calculate</mat-icon>
+			Calculer
+		</button>
+		<app-calendar-settings></app-calendar-settings>
+	</div>
+	@if (hasRemainingDays()) {
+		<mat-card class="mat-elevation-z2 warning-card">
+			<mat-card-content class="warning-content">
+				<mat-icon color="warn">warning</mat-icon>
+				<div class="warning">
+					<span>
+						{{ remainingDays() }} jour{{ remainingDays() > 1 ? 's' : '' }} de vacances
+						non placé{{ remainingDays() > 1 ? 's' : '' }}:
+					</span>
+					@for (day of remainingDaysDetails(); track $index) {
+						<span class="remaining-day-detail">- {{ day }}</span>
+					}
+					<span> Veuillez les placer manuellement. </span>
+				</div>
+			</mat-card-content>
+		</mat-card>
+	}
 </div>
@@ -13,9 +13,91 @@
 		font-size: 0.875rem;
 		margin-top: 0.25rem;
 	}
+
+	.warning-card {
+		margin-bottom: 1rem;
+	}
+
+	.warning-content {
+		display: flex;
+		align-items: center;
+		gap: 0.5rem;
+	}
+}
+
+.listOfDays {
+	display: flex;
+	flex-direction: column;
+	gap: 0.5rem;
+}
+
+.day-input-wrapper {
+	animation: slide-fade-in 200ms ease-out;
+
+	@starting-style {
+		opacity: 0;
+		transform: translateX(-20px);
+	}
+}
+
+.day-enter {
+	animation: slide-fade-in 200ms ease-out;
+}
+
+.day-leave {
+	opacity: 0;
+	transform: translateX(20px);
+	transition:
+		opacity 200ms ease-in,
+		transform 200ms ease-in;
+}
+
+@keyframes slide-fade-in {
+	from {
+		opacity: 0;
+		transform: translateX(-20px);
+	}
+	to {
+		opacity: 1;
+		transform: translateX(0);
+	}
 }

 form {
 	display: flex;
 	flex-direction: column;
 }
+
+.add-day-card {
+	display: flex;
+	flex-direction: row;
+	align-items: center;
+	padding: 16px;
+	gap: 1rem;
+	margin-bottom: 1rem;
+	cursor: pointer;
+}
+
+.add-day-card h3 {
+	flex-grow: 1;
+	margin: 0;
+	font-weight: normal;
+}
+
+.action-buttons {
+	display: flex;
+	flex-direction: row;
+	justify-content: space-between;
+	align-items: center;
+	margin-bottom: 1rem;
+	gap: 1rem;
+}
+
+.warning {
+	display: flex;
+	flex-direction: column;
+}
+
+:host {
+	max-width: 100%;
+}
@@ -1,23 +1,46 @@
 import { ComponentFixture, TestBed } from '@angular/core/testing';
-
+import { provideZonelessChangeDetection } from '@angular/core';
 import { UserInput } from './user-input';
+import { provideAnimationsAsync } from '@angular/platform-browser/animations/async';
+import { UserInputService } from '../../services/user-input-service';

 describe('UserInput', () => {
-  let component: UserInput;
-  let fixture: ComponentFixture<UserInput>;
+	let component: UserInput;
+	let fixture: ComponentFixture<UserInput>;
+	let userInputService: UserInputService;

-  beforeEach(async () => {
-    await TestBed.configureTestingModule({
-      imports: [UserInput]
-    })
-    .compileComponents();
+	beforeEach(async () => {
+		await TestBed.configureTestingModule({
+			imports: [UserInput],
+			providers: [provideZonelessChangeDetection(), provideAnimationsAsync()],
+		}).compileComponents();

-    fixture = TestBed.createComponent(UserInput);
-    component = fixture.componentInstance;
-    fixture.detectChanges();
-  });
+		fixture = TestBed.createComponent(UserInput);
+		component = fixture.componentInstance;
+		userInputService = TestBed.inject(UserInputService);
+		fixture.detectChanges();
+	});

-  it('should create', () => {
-    expect(component).toBeTruthy();
-  });
+	it('should create', () => {
+		expect(component).toBeTruthy();
+	});
+
+	it('should initialize with vacation days from service', () => {
+		const vacationDays = userInputService.vacationNumberSignal();
+		expect(vacationDays).toBeDefined();
+		expect(Array.isArray(vacationDays)).toBe(true);
+		expect(vacationDays.length).toBeGreaterThan(0);
+	});
+
+	it('should add a new vacation day', () => {
+		const initialLength = userInputService.vacationNumberSignal().length;
+		component.addDay();
+		expect(userInputService.vacationNumberSignal().length).toBe(initialLength + 1);
+	});
+
+	it('should remove a vacation day', () => {
+		const initialLength = userInputService.vacationNumberSignal().length;
+		component.removeFromList(0);
+		expect(userInputService.vacationNumberSignal().length).toBe(initialLength - 1);
+	});
 });
@@ -1,68 +1,78 @@
-import { Component, OnInit, OnDestroy, effect } from '@angular/core';
-import { MatFormField, MatLabel } from '@angular/material/form-field';
+import { Component, computed, inject, ChangeDetectionStrategy } from '@angular/core';
 import { MatInputModule } from '@angular/material/input';
-import { FormControl, FormGroup, ReactiveFormsModule, Validators } from '@angular/forms';
 import { UserInputService } from '../../services/user-input-service';
-import { VacationsNumber } from '../../services/calendar-service';
-import { debounceTime, takeUntil, Subject } from 'rxjs';
 import { CalendarSettings } from '../calendar-settings/calendar-settings';
+import { MatCard, MatCardContent } from '@angular/material/card';
+import { MatIcon } from '@angular/material/icon';
+import { DayInput } from '../userInput/day-input/day-input';
+import { MatButtonModule } from '@angular/material/button';
+import { tooltipTypeMapping, DayType, VacDay } from '../../services/calendar-service';

@Component({
 	selector: 'app-user-input',
 	imports: [
-		MatFormField,
-		MatLabel,
 		MatInputModule,
-		ReactiveFormsModule,
-		CalendarSettings,
 		CalendarSettings,
+		MatCard,
+		MatCardContent,
+		MatIcon,
+		MatButtonModule,
+		DayInput,
 	],
 	templateUrl: './user-input.html',
 	styleUrl: './user-input.scss',
+	changeDetection: ChangeDetectionStrategy.OnPush,
 })
-export class UserInput implements OnInit, OnDestroy {
-	constructor(private userInputService: UserInputService) {
-		// Watch for signal changes and update form
-		effect(() => {
-			const vacationData = this.userInputService.vacationNumberSignal();
-			this.userInputForm.patchValue(
-				{
-					CP: vacationData.cp,
-					RTT: vacationData.rtt,
-					Others: vacationData.other,
-				},
-				{ emitEvent: false },
-			);
-		});
-	}
+export class UserInput {
+	private userInputService: UserInputService = inject(UserInputService);

-	private destroy$ = new Subject<void>();
-
-	userInputForm: FormGroup = new FormGroup({
-		CP: new FormControl<number | null>(null),
-		RTT: new FormControl<number | null>(null),
-		Others: new FormControl<number | null>(null),
+	protected remainingDays = computed(() => {
+		const remaining = this.userInputService.remainingVacationDaysSignal();
+		return remaining.reduce((acc, day) => acc + day.numberOfDays, 0);
 	});

-	ngOnInit() {
-		this.userInputForm.valueChanges
-			.pipe(debounceTime(1500), takeUntil(this.destroy$))
-			.subscribe(() => this.submitForm());
+	protected remainingDaysDetails = computed(() => {
+		const remaining = this.userInputService.remainingVacationDaysSignal();
+		return remaining
+			.filter((day) => day.numberOfDays > 0)
+			.map((day) => {
+				const typeName = tooltipTypeMapping[day.type as unknown as DayType];
+				const expiryDate = day.expiryDate.toLocaleDateString('fr-FR', {
+					day: 'numeric',
+					month: 'short',
+					year: 'numeric',
+				});
+				return `${day.numberOfDays} ${typeName} (exp. ${expiryDate})`;
+			});
+	});
+
+	protected hasRemainingDays = computed(() => this.remainingDays() > 0);
+
+	protected get daysOff() {
+		return this.userInputService.vacationNumberSignal();
 	}

-	ngOnDestroy() {
-		this.destroy$.next();
-		this.destroy$.complete();
+	public addDay() {
+		this.userInputService.vacationNumberSignal.update((days) => [
+			...days,
+			this.userInputService.createVacationDay(),
+		]);
 	}

-	private submitForm() {
-		if (this.userInputForm.valid) {
-			const vacationData: VacationsNumber = {
-				cp: this.userInputForm.get('CP')?.value || 0,
-				rtt: this.userInputForm.get('RTT')?.value || 0,
-				other: this.userInputForm.get('Others')?.value || 0,
-			};
-			this.userInputService.vacationNumberSignal.set(vacationData);
-		}
+	public removeFromList(index: number) {
+		this.userInputService.vacationNumberSignal.update((days) =>
+			days.filter((_, i) => i !== index),
+		);
+	}
+
+	public updateDay(index: number, updatedDay: VacDay) {
+		this.userInputService.vacationNumberSignal.update((days) =>
+			days.map((day, i) => (i === index ? updatedDay : day)),
+		);
+	}
+
+	public triggerComputation() {
+		// Trigger signal update by setting a new array reference
+		this.userInputService.vacationNumberSignal.update((days) => [...days]);
 	}
 }
@@ -1,23 +1,23 @@
 import { ComponentFixture, TestBed } from '@angular/core/testing';
-
+import { provideZonelessChangeDetection } from '@angular/core';
 import { UserSettings } from './user-settings';

 describe('UserSettings', () => {
-  let component: UserSettings;
-  let fixture: ComponentFixture<UserSettings>;
+	let component: UserSettings;
+	let fixture: ComponentFixture<UserSettings>;

-  beforeEach(async () => {
-    await TestBed.configureTestingModule({
-      imports: [UserSettings]
-    })
-    .compileComponents();
+	beforeEach(async () => {
+		await TestBed.configureTestingModule({
+			imports: [UserSettings],
+			providers: [provideZonelessChangeDetection()],
+		}).compileComponents();

-    fixture = TestBed.createComponent(UserSettings);
-    component = fixture.componentInstance;
-    fixture.detectChanges();
-  });
+		fixture = TestBed.createComponent(UserSettings);
+		component = fixture.componentInstance;
+		fixture.detectChanges();
+	});

-  it('should create', () => {
-    expect(component).toBeTruthy();
-  });
+	it('should create', () => {
+		expect(component).toBeTruthy();
+	});
 });
@@ -0,0 +1,36 @@
+<!-- <mat-list-item role="listitem"> -->
+<mat-card class="card">
+	<mat-form-field class="numberInput">
+		<input
+			matInput
+			type="number"
+			min="0"
+			[value]="day().numberOfDays"
+			(input)="onInput($event)"
+		/>
+	</mat-form-field>
+	<mat-form-field class="dayTypeInput">
+		<mat-select (valueChange)="onTypeChange($event)" [value]="day().type">
+			<mat-option></mat-option>
+			@for (dayType of selectableDayTypes; track $index) {
+				<mat-option [value]="dayType">{{ tooltipTypeMapping[dayType] }}</mat-option>
+			}
+		</mat-select>
+	</mat-form-field>
+	<mat-form-field class="dateInput">
+		<mat-label>Choose a date</mat-label>
+		<input
+			matInput
+			type="datetime"
+			[matDatepicker]="picker"
+			[value]="day().expiryDate"
+			(dateChange)="addEvent($event)"
+		/>
+		<mat-datepicker-toggle matIconSuffix [for]="picker"></mat-datepicker-toggle>
+		<mat-datepicker #picker></mat-datepicker>
+	</mat-form-field>
+	<button matFab aria-label="Delete entry" (click)="deleteEntry.emit()">
+		<mat-icon>close</mat-icon>
+	</button>
+</mat-card>
+<!-- </mat-list-item> -->
@@ -0,0 +1,21 @@
+.card {
+	display: flex;
+	flex-direction: row;
+	align-items: center;
+	justify-content: space-between;
+	padding: 16px;
+	gap: 16px;
+	flex-wrap: wrap;
+}
+
+.dateInput {
+	flex-grow: 1;
+}
+
+.numberInput {
+	width: 80px;
+}
+
+::ng-deep .mat-mdc-form-field-subscript-wrapper {
+	display: none;
+}
@@ -0,0 +1,33 @@
+import { ComponentFixture, TestBed } from '@angular/core/testing';
+import { provideAnimationsAsync } from '@angular/platform-browser/animations/async';
+
+import { DayInput } from './day-input';
+import { SelectableDayType, VacDay } from '../../../services/calendar-service';
+
+describe('DayInput', () => {
+	let component: DayInput;
+	let fixture: ComponentFixture<DayInput>;
+
+	const mockVacDay: VacDay = {
+		id: 'test-id',
+		type: SelectableDayType.CP,
+		numberOfDays: 5,
+		expiryDate: new Date('2025-12-31'),
+	};
+
+	beforeEach(async () => {
+		await TestBed.configureTestingModule({
+			imports: [DayInput],
+			providers: [provideAnimationsAsync()],
+		}).compileComponents();
+
+		fixture = TestBed.createComponent(DayInput);
+		component = fixture.componentInstance;
+		fixture.componentRef.setInput('day', mockVacDay);
+		fixture.detectChanges();
+	});
+
+	it('should create', () => {
+		expect(component).toBeTruthy();
+	});
+});
@@ -0,0 +1,103 @@
+import { Component, input, output, ChangeDetectionStrategy } from '@angular/core';
+import { SelectableDayType, tooltipTypeMapping, VacDay } from '../../../services/calendar-service';
+import { MatCard } from '@angular/material/card';
+import { MatOption, MatSelect } from '@angular/material/select';
+import { MatInput, MatInputModule, MatLabel } from '@angular/material/input';
+import {
+	MatDatepicker,
+	MatDatepickerInput,
+	MatDatepickerInputEvent,
+	MatDatepickerToggle,
+} from '@angular/material/datepicker';
+import {
+	DateAdapter,
+	MAT_DATE_FORMATS,
+	MAT_DATE_LOCALE,
+	NativeDateAdapter,
+} from '@angular/material/core';
+import { MatIconModule } from '@angular/material/icon';
+import { MatButtonModule } from '@angular/material/button';
+
+class CustomDateAdapter extends NativeDateAdapter {
+	override format(date: Date, displayFormat: unknown): string {
+		if (displayFormat === 'input') {
+			const day = date.getDate().toString().padStart(2, '0');
+			const month = (date.getMonth() + 1).toString().padStart(2, '0');
+			const year = date.getFullYear();
+			return `${day}/${month}/${year}`;
+		}
+		return super.format(date, displayFormat as object);
+	}
+
+	override parse(value: string): Date | null {
+		if (!value) return null;
+		const parts = value.split('/');
+		if (parts.length === 3) {
+			const day = parseInt(parts[0], 10);
+			const month = parseInt(parts[1], 10) - 1;
+			const year = parseInt(parts[2], 10);
+			if (!isNaN(day) && !isNaN(month) && !isNaN(year)) {
+				return new Date(year, month, day);
+			}
+		}
+		return null;
+	}
+}
+
+const MY_DATE_FORMATS = {
+	parse: {
+		dateInput: 'input',
+	},
+	display: {
+		dateInput: 'input',
+		monthYearLabel: { year: 'numeric', month: 'short' },
+		dateA11yLabel: { year: 'numeric', month: 'long', day: 'numeric' },
+		monthYearA11yLabel: { year: 'numeric', month: 'long' },
+	},
+};
+
+@Component({
+	selector: 'app-day-input',
+	imports: [
+		MatIconModule,
+		MatCard,
+		MatSelect,
+		MatOption,
+		MatInput,
+		MatDatepicker,
+		MatLabel,
+		MatDatepickerToggle,
+		MatDatepickerInput,
+		MatInputModule,
+		MatButtonModule,
+	],
+	templateUrl: './day-input.html',
+	styleUrl: './day-input.scss',
+	changeDetection: ChangeDetectionStrategy.OnPush,
+	providers: [
+		{ provide: DateAdapter, useClass: CustomDateAdapter },
+		{ provide: MAT_DATE_LOCALE, useValue: 'en-GB' },
+		{ provide: MAT_DATE_FORMATS, useValue: MY_DATE_FORMATS },
+	],
+})
+export class DayInput {
+	public day = input.required<VacDay>();
+	public dayChange = output<VacDay>();
+	public deleteEntry = output<void>();
+
+	protected readonly selectableDayTypes = Object.values(SelectableDayType);
+	protected readonly tooltipTypeMapping = tooltipTypeMapping;
+
+	onInput(event: Event) {
+		const value = Number((event.target as HTMLInputElement).value);
+		this.dayChange.emit({ ...this.day(), numberOfDays: value });
+	}
+
+	onTypeChange(type: SelectableDayType) {
+		this.dayChange.emit({ ...this.day(), type });
+	}
+
+	addEvent(event: MatDatepickerInputEvent<Date>) {
+		this.dayChange.emit({ ...this.day(), expiryDate: event.value! });
+	}
+}
@@ -1,16 +1,205 @@
 import { TestBed } from '@angular/core/testing';
+import { provideZonelessChangeDetection } from '@angular/core';
+import { CalendarService, DayType, SelectedDate, SelectedDates } from './calendar-service';
+import { DateRange } from '@angular/material/datepicker';

-import { Calendar } from './calendar';
-
-describe('Calendar', () => {
-	let service: Calendar;
+describe('CalendarService', () => {
+	let service: CalendarService;

 	beforeEach(() => {
-		TestBed.configureTestingModule({});
-		service = TestBed.inject(Calendar);
+		TestBed.configureTestingModule({
+			providers: [provideZonelessChangeDetection()],
+		});
+		service = TestBed.inject(CalendarService);
 	});

 	it('should be created', () => {
 		expect(service).toBeTruthy();
 	});
+
+	describe('getHolidays', () => {
+		it('should return an array of holidays', () => {
+			const holidays = service.getHolidays();
+			expect(Array.isArray(holidays)).toBe(true);
+			expect(holidays.length).toBeGreaterThan(0);
+		});
+
+		it('should cache holidays for the same year', () => {
+			const holidays1 = service.getHolidays();
+			const holidays2 = service.getHolidays();
+			expect(holidays1).toEqual(holidays2);
+		});
+	});
+
+	describe('static date calculation methods', () => {
+		it('should calculate days in a week', () => {
+			const week = CalendarService.daysInWeek(0, 0, 2024);
+			expect(week.length).toBe(7);
+		});
+
+		it('should calculate weeks in a month', () => {
+			const weeks = CalendarService.weeksInMonth(0, 2024);
+			expect(weeks.length).toBeGreaterThan(0);
+			expect(weeks.length).toBeLessThanOrEqual(6);
+		});
+
+		it('should calculate months in a year', () => {
+			const months = CalendarService.monthsInYear(2024);
+			expect(months.length).toBe(12);
+		});
+
+		it('should calculate months from now', () => {
+			const months = service.monthsInAYearFromNow();
+			expect(months.length).toBe(12);
+		});
+
+		it('should return week number for a date', () => {
+			const date = new Date(2024, 0, 1);
+			const weekNumber = CalendarService.getWeekNumber(date);
+			expect(weekNumber).toBeGreaterThan(0);
+			expect(weekNumber).toBeLessThanOrEqual(53);
+		});
+	});
+
+	describe('getSelectedDatesForYear', () => {
+		it('should return selected dates for the year', () => {
+			const selectedDates = service.getSelectedDatesForYear();
+			expect(selectedDates).toBeDefined();
+			expect(selectedDates._datesSelected.length).toBeGreaterThan(0);
+		});
+
+		it('should include weekends', () => {
+			const selectedDates = service.getSelectedDatesForYear();
+			const hasWeekend = selectedDates._datesSelected.some(
+				(date) => date.type === DayType.WEEKEND,
+			);
+			expect(hasWeekend).toBe(true);
+		});
+
+		it('should include holidays', () => {
+			const selectedDates = service.getSelectedDatesForYear();
+			const hasHoliday = selectedDates._datesSelected.some(
+				(date) => date.type === DayType.CLOSED_DAY,
+			);
+			expect(hasHoliday).toBe(true);
+		});
+
+		it('should include today', () => {
+			const selectedDates = service.getSelectedDatesForYear();
+			const hasToday = selectedDates._datesSelected.some(
+				(date) => date.type === DayType.TODAY,
+			);
+			expect(hasToday).toBe(true);
+		});
+	});
+
+	describe('setWeekendSelection', () => {
+		it('should add weekend for Saturday', () => {
+			const selectedDates = new SelectedDates();
+			const saturday = new Date(2024, 0, 6); // A Saturday
+			service.setWeekendSelection(saturday, selectedDates);
+			expect(selectedDates._datesSelected.length).toBeGreaterThan(0);
+		});
+	});
+});
+
+describe('SelectedDate', () => {
+	it('should check if date is selected', () => {
+		const date = new Date(2024, 0, 1);
+		const selectedDate = new SelectedDate(DayType.CP, new DateRange<Date>(date, date));
+		expect(selectedDate.isSelected(date)).toBe(true);
+	});
+
+	it('should check if date is start', () => {
+		const date = new Date(2024, 0, 1);
+		const selectedDate = new SelectedDate(DayType.CP, new DateRange<Date>(date, date));
+		expect(selectedDate.isStart(date)).toBe(true);
+	});
+
+	it('should check if date is end', () => {
+		const date = new Date(2024, 0, 1);
+		const selectedDate = new SelectedDate(DayType.CP, new DateRange<Date>(date, date));
+		expect(selectedDate.isEnd(date)).toBe(true);
+	});
+
+	it('should return correct classes for date', () => {
+		const date = new Date(2024, 0, 1);
+		const selectedDate = new SelectedDate(DayType.CP, new DateRange<Date>(date, date));
+		const classes = selectedDate.getClasses(date);
+		expect(classes).toContain(DayType.CP);
+	});
+
+	it('should return tooltip for selected date', () => {
+		const date = new Date(2024, 0, 1);
+		const selectedDate = new SelectedDate(DayType.CP, new DateRange<Date>(date, date));
+		const tooltip = selectedDate.getTooltip(date);
+		expect(tooltip).toBeTruthy();
+	});
+
+	it('should calculate length in days', () => {
+		const startDate = new Date(2024, 0, 1);
+		const endDate = new Date(2024, 0, 3);
+		const selectedDate = new SelectedDate(DayType.CP, new DateRange<Date>(startDate, endDate));
+		expect(selectedDate.getLengthInDays()).toBe(3);
+	});
+
+	it('should not mark TODAY as selected', () => {
+		const date = new Date(2024, 0, 1);
+		const selectedDate = new SelectedDate(DayType.TODAY, new DateRange<Date>(date, date));
+		expect(selectedDate.isSelected(date)).toBe(false);
+	});
+});
+
+describe('SelectedDates', () => {
+	it('should push selected dates', () => {
+		const selectedDates = new SelectedDates();
+		const date = new Date(2024, 0, 1);
+		selectedDates.push(new SelectedDate(DayType.CP, new DateRange<Date>(date, date)));
+		expect(selectedDates._datesSelected.length).toBe(1);
+	});
+
+	it('should check if date is selected', () => {
+		const selectedDates = new SelectedDates();
+		const date = new Date(2024, 0, 1);
+		selectedDates.push(new SelectedDate(DayType.CP, new DateRange<Date>(date, date)));
+		expect(selectedDates.isSelected(date)).toBe(true);
+	});
+
+	it('should group adjacent dates', () => {
+		const selectedDates = new SelectedDates();
+		const date1 = new Date(2024, 0, 1);
+		const date2 = new Date(2024, 0, 2);
+		selectedDates._datesSelected.push(
+			new SelectedDate(DayType.CP, new DateRange<Date>(date1, date1)),
+		);
+		selectedDates._datesSelected.push(
+			new SelectedDate(DayType.RTT, new DateRange<Date>(date2, date2)),
+		);
+		selectedDates.update();
+		expect(selectedDates.datesSelected.length).toBeGreaterThan(2);
+	});
+
+	it('should compute heuristics', () => {
+		const selectedDates = new SelectedDates();
+		const date = new Date(2024, 0, 1);
+		selectedDates.push(new SelectedDate(DayType.CP, new DateRange<Date>(date, date)));
+		const heuristic = selectedDates.computeHeuristics();
+		expect(typeof heuristic).toBe('number');
+	});
+
+	it('should return correct classes', () => {
+		const selectedDates = new SelectedDates();
+		const date = new Date(2024, 0, 1);
+		selectedDates.push(new SelectedDate(DayType.CP, new DateRange<Date>(date, date)));
+		const classes = selectedDates.getClasses(date);
+		expect(classes).toContain(DayType.CP);
+	});
+
+	it('should return tooltip', () => {
+		const selectedDates = new SelectedDates();
+		const date = new Date(2024, 0, 1);
+		selectedDates.push(new SelectedDate(DayType.CP, new DateRange<Date>(date, date)));
+		const tooltip = selectedDates.getTooltip(date);
+		expect(tooltip).toBeTruthy();
+	});
 });
@@ -1,10 +1,11 @@
-import { Injectable } from '@angular/core';
+import { Injectable, inject } from '@angular/core';
 import { DateRange } from '@angular/material/datepicker';
 import Holidays, { HolidaysTypes } from 'date-holidays';
 import dayjs from 'dayjs';
 import weekOfYear from 'dayjs/plugin/weekOfYear';
 import isoWeek from 'dayjs/plugin/isoWeek';
 import { CalendarSettingsService } from './calendar-settings-service';
+import { DateCacheService } from './date-cache.service';

 dayjs.extend(weekOfYear);
 dayjs.extend(isoWeek);
@@ -19,32 +20,49 @@ const allTypesOptions: HolidaysTypes.Options = {
 	providedIn: 'root',
 })
 export class CalendarService {
+	private dateCache = inject(DateCacheService);
+
+	// Cache for holiday timestamps
+	private holidayTimestampsCache: Set<number> | null = null;
+	private holidayCacheYear: number | null = null;
+
 	// Get selected dates from current date to the next year
 	getSelectedDatesFromNow(): SelectedDates {
-		const holidays = this.getHolidays();
-		let selectedDates: SelectedDates = new SelectedDates();
+		const _holidays = this.getHolidays();
+		const selectedDates: SelectedDates = new SelectedDates();
 		// Logic to populate selectedDates from now until the next year
 		return selectedDates;
 	}

 	getSelectedDatesForYear(): SelectedDates {
 		const holidays = this.getHolidays();
-		const monthInAYear = CalendarService.monthsInAYearFromNow();
-		let selectedDates: SelectedDates = new SelectedDates();
+		const monthInAYear = this.monthsInAYearFromNow();
+		const selectedDates: SelectedDates = new SelectedDates();
+
+		// Use DateCacheService to get today's date components
+		const {
+			date: todayDate,
+			month: todayMonth,
+			year: todayYear,
+		} = this.dateCache.getTodayComponents();
+
+		// Create a Set of holiday timestamps for O(1) lookup instead of O(n)
+		const holidayTimestamps = new Set(holidays.map((h) => h.getTime()));
+
 		for (const weeksInAMonth of monthInAYear) {
 			for (const daysInAWeek of weeksInAMonth) {
 				for (const day of daysInAWeek) {
 					if (day) {
 						this.setWeekendSelection(day, selectedDates);
-						if (holidays.some((holiday) => holiday.getTime() === day.getTime())) {
+						if (holidayTimestamps.has(day.getTime())) {
 							selectedDates._datesSelected.push(
 								new SelectedDate(DayType.CLOSED_DAY, new DateRange<Date>(day, day)),
 							);
 						}
 						if (
-							day.getDate() === new Date().getDate() &&
-							day.getMonth() === new Date().getMonth() &&
-							day.getFullYear() === new Date().getFullYear()
+							day.getDate() === todayDate &&
+							day.getMonth() === todayMonth &&
+							day.getFullYear() === todayYear
 						) {
 							selectedDates._datesSelected.push(
 								new SelectedDate(DayType.TODAY, new DateRange<Date>(day, day)),
@@ -84,12 +102,24 @@ export class CalendarService {
 	}

 	getHolidays(): Date[] {
+		// Cache holidays to avoid recalculation
+		const currentYear = this.dateCache.getCurrentYear();
+		if (this.holidayCacheYear === currentYear && this.holidayTimestampsCache) {
+			// Return timestamps directly for efficient lookup
+			return Array.from(this.holidayTimestampsCache).map((ts) => new Date(ts));
+		}
+
 		// Logic to return holidays for the given year
 		const hd = new Holidays('FR', allTypesOptions);
-		const holidays = hd.getHolidays(new Date().getFullYear(), lang);
-		const holidaysPlusOne = hd.getHolidays(new Date().getFullYear() + 1, lang);
+		const holidays = hd.getHolidays(currentYear, lang);
+		const holidaysPlusOne = hd.getHolidays(currentYear + 1, lang);
 		holidays.push(...holidaysPlusOne);
-		let holidaysDate: Date[] = holidays.map((holiday) => new Date(holiday.date));
+		const holidaysDate: Date[] = holidays.map((holiday) => new Date(holiday.date));
+
+		// Update cache
+		this.holidayTimestampsCache = new Set(holidaysDate.map((d) => d.getTime()));
+		this.holidayCacheYear = currentYear;
+
 		return holidaysDate;
 	}

@@ -137,14 +167,14 @@ export class CalendarService {
 		return months;
 	}

-	static monthsInAYearFromNow(): Year {
+	monthsInAYearFromNow(): Year {
 		const months: Year = [];
-		const currentMonthIndex = new Date().getMonth();
-		const currentYear = new Date().getFullYear();
+		const currentMonthIndex = this.dateCache.getCurrentMonth();
+		const currentYear = this.dateCache.getCurrentYear();
 		for (let i = 0; i < 12; i++) {
 			const monthIndex = (currentMonthIndex + i) % 12;
 			const year = currentYear + Math.floor((currentMonthIndex + i) / 12);
-			months.push(this.weeksInMonth(monthIndex, year));
+			months.push(CalendarService.weeksInMonth(monthIndex, year));
 		}
 		return months;
 	}
@@ -154,10 +184,11 @@ export class CalendarService {
 	}
 }

-export type VacationsNumber = {
-	rtt: number;
-	cp: number;
-	other: number;
+export type VacDay = {
+	id: string;
+	type: SelectableDayType;
+	numberOfDays: number;
+	expiryDate: Date;
 };

 export type Week = (Date | null)[];
@@ -173,6 +204,12 @@ export enum DayType {
 	TODAY = 'today',
 }

+export enum SelectableDayType {
+	CP = DayType.CP,
+	RTT = DayType.RTT,
+	OTHER = DayType.OTHER,
+}
+
 export const tooltipTypeMapping: { [key in DayType]: string } = {
 	[DayType.WEEKEND]: 'Weekend',
 	[DayType.CLOSED_DAY]: 'Jour Férié',
@@ -266,6 +303,10 @@ export class SelectedDates implements SelectedDateInterface {
 	private minDate: Date | null = null;
 	private maxDate: Date | null = null;

+	// Constant to indicate no valid strategy was found
+	private static readonly NO_VALID_STRATEGY_HEURISTIC = -1;
+	private static readonly MAX_DAYS_WITH_SAME_HEURISTIC = 9;
+
 	update(): void {
 		this.datesSelected = this._datesSelected.slice();
 		this.grouping();
@@ -449,7 +490,7 @@ export class SelectedDates implements SelectedDateInterface {
 			const current = sorted[i];
 			const next = sorted[i + 1];

-			// Get dates as UTC strings to remove timezone issues
+			// Get dates as UTC strings to remove timezone issues (handles DST properly)
 			const currentEndDate = new Date(current.range.end ?? new Date());
 			const nextStartDate = new Date(next.range.start ?? new Date());

@@ -468,7 +509,7 @@ export class SelectedDates implements SelectedDateInterface {

 			// Check if adjacent (next day) - this is the best case!
 			if (nextStartTime - currentEndTime === oneDayInMs) {
-				totalScore += 10; // Big bonus for adjacency
+				totalScore += 15; // 50% increased bonus for adjacency; adjacency is highly valued in the scoring system
 			} else if (nextStartTime > currentEndTime) {
 				// Penalty based on days between the two dates
 				const daysBetween = Math.floor((nextStartTime - currentEndTime) / oneDayInMs) - 1;
@@ -486,7 +527,7 @@ export class SelectedDates implements SelectedDateInterface {
 			const daysInRange = selectedDate.getLengthInDays();

 			// For each day in the range, add it to the appropriate month
-			let currentDate = new Date(selectedDate.range.start);
+			const currentDate = new Date(selectedDate.range.start);
 			for (let i = 0; i < daysInRange; i++) {
 				const monthKey = currentDate.getFullYear() * 12 + currentDate.getMonth();
 				monthCounts.set(monthKey, (monthCounts.get(monthKey) ?? 0) + 1);
@@ -502,50 +543,146 @@ export class SelectedDates implements SelectedDateInterface {
 		return totalScore;
 	}

-	optimizeVacations(
-		vacationsNumber: VacationsNumber,
+	async optimizeVacations(
+		vacationDays: VacDay[],
 		calendarSettingsService: CalendarSettingsService,
-	): void {
-		if (calendarSettingsService.samediMalin()) this.samediMalin(vacationsNumber);
-		while (vacationsNumber.cp > 0) {
-			const result = this.lookForVacation(DayType.CP);
-			if (result.heuristic === -1) {
+		calendarService: CalendarService,
+		progressCallback?: (progress: number) => void,
+	): Promise<VacDay[]> {
+		if (calendarSettingsService.get('samediMalin')()) this.samediMalin(vacationDays);
+
+		// Calculate total days to process
+		const totalDays = vacationDays.reduce((sum, vd) => sum + vd.numberOfDays, 0);
+		let processedDays = 0;
+
+		// Helper function to update progress, throttled to every 5%
+		let lastReportedProgress = 0;
+		const PROGRESS_STEP = 5; // percent
+		const updateProgress = async () => {
+			if (progressCallback && totalDays > 0) {
+				const progress = Math.round((processedDays / totalDays) * 100);
+				if (progress - lastReportedProgress >= PROGRESS_STEP || progress === 100) {
+					progressCallback(progress);
+					lastReportedProgress = progress;
+					// Allow UI to update with a microtask
+					await new Promise((resolve) => setTimeout(resolve, 0));
+				}
+			}
+		};
+
+		await updateProgress();
+
+		// Track VacDays that can't find valid placements
+		const exhaustedVacDayIds = new Set<string>();
+
+		// Process vacation days ordered by expiration date (earliest first)
+		while (vacationDays.some((vd) => vd.numberOfDays > 0 && !exhaustedVacDayIds.has(vd.id))) {
+			// Sort by expiration date to use days that expire first, excluding exhausted ones
+			const sortedVacDays = [...vacationDays]
+				.filter((vd) => vd.numberOfDays > 0 && !exhaustedVacDayIds.has(vd.id))
+				.sort((a, b) => a.expiryDate.getTime() - b.expiryDate.getTime());
+
+			if (sortedVacDays.length === 0) {
 				break;
 			}
-			vacationsNumber.cp -= 1;
-		}
-		while (vacationsNumber.rtt > 0) {
-			const result = this.lookForVacation(DayType.RTT);
-			if (result.heuristic === -1) {
-				break;
+
+			const vacDayToUse = sortedVacDays[0];
+			const result = this.lookForVacation(vacDayToUse, calendarService);
+
+			if (result.heuristic === SelectedDates.NO_VALID_STRATEGY_HEURISTIC) {
+				// Mark this VacDay as exhausted and try other vacation days
+				exhaustedVacDayIds.add(vacDayToUse.id);
+				continue;
 			}
-			vacationsNumber.rtt -= 1;
+
+			vacDayToUse.numberOfDays -= 1;
+			processedDays++;
+			await updateProgress();
 		}
-		while (vacationsNumber.other > 0) {
-			const result = this.lookForVacation(DayType.OTHER);
-			if (result.heuristic === -1) {
-				break;
-			}
-			vacationsNumber.other -= 1;
+
+		// Final progress update (100%)
+		if (progressCallback) {
+			progressCallback(100);
 		}
+
+		// Inform user if not all days were placed
+		const remainingDays = vacationDays.reduce((sum, vd) => sum + vd.numberOfDays, 0);
+		if (remainingDays > 0) {
+			console.warn(
+				`Optimization stopped: ${remainingDays} of ${totalDays} vacation days remain unplaced. ` +
+					`Too many days have equivalent placement quality - please place remaining days manually.`,
+			);
+		}
+
+		return vacationDays;
 	}

-	samediMalin(vacationsNumber: VacationsNumber): void {
+	samediMalin(vacationDays: VacDay[]): void {
 		const now = new Date();
 		now.setHours(0, 0, 0, 0);
+		const nowTime = now.getTime();

-		const samedi_ferie = this.datesSelected.filter(
+		const samedi_ferie = this._datesSelected.filter(
 			(date) => date.type === DayType.CLOSED_DAY && date.range.start?.getDay() === 6,
 		);

+		// Helper function to get available CP days that don't expire before a given date (ordered by expiry date)
+		const getAvailableCpDaysForDate = (useByDate: Date): VacDay[] => {
+			const useByTime = useByDate.getTime();
+			return vacationDays
+				.filter(
+					(vd) =>
+						vd.type === SelectableDayType.CP &&
+						vd.numberOfDays > 0 &&
+						vd.expiryDate.getTime() >= useByTime,
+				)
+				.sort((a, b) => a.expiryDate.getTime() - b.expiryDate.getTime());
+		};
+
+		// Helper function to get total available CP days that don't expire before a given date
+		const getTotalCpDaysForDate = (useByDate: Date): number => {
+			const useByTime = useByDate.getTime();
+			return vacationDays
+				.filter(
+					(vd) =>
+						vd.type === SelectableDayType.CP && vd.expiryDate.getTime() >= useByTime,
+				)
+				.reduce((sum, vd) => sum + vd.numberOfDays, 0);
+		};
+
+		// Helper function to consume 2 CP days from the available pool for a specific date
+		const consume2CpDaysForDate = (useByDate: Date): boolean => {
+			let daysToConsume = 2;
+			const cpDays = getAvailableCpDaysForDate(useByDate);
+			for (const cpDay of cpDays) {
+				if (daysToConsume === 0) break;
+				const toConsume = Math.min(cpDay.numberOfDays, daysToConsume);
+				cpDay.numberOfDays -= toConsume;
+				daysToConsume -= toConsume;
+			}
+			return daysToConsume === 0;
+		};
+
+		// Helper function to add 1 OTHER day as reward
+		const addOtherDayReward = (): void => {
+			// Find an existing OTHER VacDay or create a new one
+			const otherDay = vacationDays.find((vd) => vd.type === SelectableDayType.OTHER);
+			if (otherDay) {
+				otherDay.numberOfDays += 1;
+			} else {
+				// Create a new OTHER VacDay with a far future expiry date
+				vacationDays.push({
+					id: crypto.randomUUID(),
+					type: SelectableDayType.OTHER,
+					numberOfDays: 1,
+					expiryDate: new Date(now.getFullYear() + 10, 11, 31),
+				});
+			}
+		};
+
 		for (const holiday of samedi_ferie) {
 			if (!holiday.range.start) continue;

-			// Skip if no CP days available
-			if (vacationsNumber.cp < 2) {
-				continue;
-			}
-
 			// Get the Saturday date (holiday) and the following Sunday
 			const saturdayDate = new Date(holiday.range.start);
 			const sundayDate = new Date(saturdayDate);
@@ -570,21 +707,24 @@ export class SelectedDates implements SelectedDateInterface {
 			const oneDayAfter = new Date(sundayDate);
 			oneDayAfter.setDate(sundayDate.getDate() + 1);

-			// Check if we can apply each strategy (and not in the past)
+			// Check if we can apply each strategy (not in the past, not already selected, and have non-expired CP days)
 			const canApplyTwoBeforeStrategy =
-				twoDaysBefore1 >= now &&
+				twoDaysBefore1.getTime() >= nowTime &&
 				!this.isSelected(twoDaysBefore1) &&
-				!this.isSelected(twoDaysBefore2);
+				!this.isSelected(twoDaysBefore2) &&
+				getTotalCpDaysForDate(twoDaysBefore2) >= 2; // Check expiry against the latest date used

 			const canApplyTwoAfterStrategy =
-				twoDaysAfter1 >= now &&
+				twoDaysAfter1.getTime() >= nowTime &&
 				!this.isSelected(twoDaysAfter1) &&
-				!this.isSelected(twoDaysAfter2);
+				!this.isSelected(twoDaysAfter2) &&
+				getTotalCpDaysForDate(twoDaysAfter2) >= 2; // Check expiry against the latest date used

 			const canApplyMixedStrategy =
-				oneDayBefore >= now &&
+				oneDayBefore.getTime() >= nowTime &&
 				!this.isSelected(oneDayBefore) &&
-				!this.isSelected(oneDayAfter);
+				!this.isSelected(oneDayAfter) &&
+				getTotalCpDaysForDate(oneDayAfter) >= 2; // Check expiry against the latest date used

 			// Test all applicable strategies and choose the one with the best heuristic score
 			const strategies: { apply: () => void; heuristic: number }[] = [];
@@ -597,6 +737,7 @@ export class SelectedDates implements SelectedDateInterface {
 						new DateRange<Date>(twoDaysBefore1, twoDaysBefore2),
 					),
 				);
+				const heuristic = this.computeHeuristics();
 				strategies.push({
 					apply: () => {
 						this._datesSelected = [...tempDatesBackup];
@@ -606,10 +747,10 @@ export class SelectedDates implements SelectedDateInterface {
 								new DateRange<Date>(twoDaysBefore1, twoDaysBefore2),
 							),
 						);
-						vacationsNumber.cp -= 2;
-						vacationsNumber.other += 1; // Reward: gain 1 other day
+						consume2CpDaysForDate(twoDaysBefore2);
+						addOtherDayReward();
 					},
-					heuristic: this.computeHeuristics(),
+					heuristic: heuristic,
 				});
 				this._datesSelected = [...tempDatesBackup];
 				this.datesSelected = this._datesSelected.slice();
@@ -620,6 +761,7 @@ export class SelectedDates implements SelectedDateInterface {
 				this.push(
 					new SelectedDate(DayType.CP, new DateRange<Date>(twoDaysAfter1, twoDaysAfter2)),
 				);
+				const heuristic = this.computeHeuristics();
 				strategies.push({
 					apply: () => {
 						this._datesSelected = [...tempDatesBackup];
@@ -629,10 +771,10 @@ export class SelectedDates implements SelectedDateInterface {
 								new DateRange<Date>(twoDaysAfter1, twoDaysAfter2),
 							),
 						);
-						vacationsNumber.cp -= 2;
-						vacationsNumber.other += 1; // Reward: gain 1 other day
+						consume2CpDaysForDate(twoDaysAfter2);
+						addOtherDayReward();
 					},
-					heuristic: this.computeHeuristics(),
+					heuristic: heuristic,
 				});
 				this._datesSelected = [...tempDatesBackup];
 				this.datesSelected = this._datesSelected.slice();
@@ -646,6 +788,7 @@ export class SelectedDates implements SelectedDateInterface {
 				this.push(
 					new SelectedDate(DayType.CP, new DateRange<Date>(oneDayAfter, oneDayAfter)),
 				);
+				const heuristic = this.computeHeuristics();
 				strategies.push({
 					apply: () => {
 						this._datesSelected = [...tempDatesBackup];
@@ -661,10 +804,10 @@ export class SelectedDates implements SelectedDateInterface {
 								new DateRange<Date>(oneDayAfter, oneDayAfter),
 							),
 						);
-						vacationsNumber.cp -= 2;
-						vacationsNumber.other += 1; // Reward: gain 1 other day
+						consume2CpDaysForDate(oneDayAfter);
+						addOtherDayReward();
 					},
-					heuristic: this.computeHeuristics(),
+					heuristic: heuristic,
 				});
 				this._datesSelected = [...tempDatesBackup];
 				this.datesSelected = this._datesSelected.slice();
@@ -681,65 +824,103 @@ export class SelectedDates implements SelectedDateInterface {
 		}
 	}

-	lookForVacation(vacType: DayType): { apply: () => void; heuristic: number } {
-		const daysOfYear = CalendarService.monthsInAYearFromNow();
+	lookForVacation(
+		vacDay: VacDay,
+		calendarService: CalendarService,
+	): { apply: () => void; heuristic: number } {
+		const daysOfYear = calendarService.monthsInAYearFromNow();
 		const now = new Date();
 		now.setHours(0, 0, 0, 0);
-		daysOfYear.forEach((month) => {
-			month.forEach((week) => {
-				week.forEach((day) => {
-					if (day) {
-						if (day) day.setHours(0, 0, 0, 0);
-						if (day && day < now) {
-							week[week.indexOf(day)] = null;
-						}
-					}
-				});
-			});
-		});
-		const tempDatesBackup = [...this._datesSelected];
-		let strategies: { apply: () => void; heuristic: number; value: Date }[] = [];
+		const nowTime = now.getTime();
+		const expiryTime = vacDay.expiryDate.getTime();
+
+		// Preprocess: filter out past days, already selected days, and days after expiry date
+		const candidateDays: Date[] = [];
 		for (const month of daysOfYear) {
 			for (const week of month) {
 				for (const day of week) {
-					if (day && !this.isSelected(day)) {
-						this._datesSelected = [...tempDatesBackup];
-						this.datesSelected = this._datesSelected.slice();
-						this.grouping();
-						// mark these days as vacation
-						const startDay = new Date(day);
-						const endDay = new Date(day);
-						this.datesSelected.push(
-							new SelectedDate(vacType, new DateRange<Date>(startDay, endDay)),
-						);
-						strategies.push({
-							apply: () => {
-								this._datesSelected = [...tempDatesBackup];
-								this.push(
-									new SelectedDate(
-										vacType,
-										new DateRange<Date>(startDay, endDay),
-									),
-								);
-							},
-							heuristic: this.computeHeuristics(),
-							value: startDay,
-						});
-						this._datesSelected = [...tempDatesBackup];
-						this.datesSelected = this._datesSelected.slice();
-						this.grouping();
+					if (day) {
+						day.setHours(0, 0, 0, 0);
+						const dayTime = day.getTime();
+						if (dayTime >= nowTime && dayTime <= expiryTime && !this.isSelected(day)) {
+							candidateDays.push(day);
+						}
 					}
 				}
 			}
 		}
-		// Apply the strategy with the best heuristic score
-		if (strategies.length > 0) {
-			const bestStrategy = strategies.reduce((best, current) =>
-				current.heuristic > best.heuristic ? current : best,
-			);
+
+		// Early exit if no candidates
+		if (candidateDays.length === 0) {
+			return { apply: () => {}, heuristic: SelectedDates.NO_VALID_STRATEGY_HEURISTIC };
+		}
+
+		const vacType = vacDay.type as unknown as DayType;
+		const tempDatesBackup = [...this._datesSelected];
+		let bestStrategy: { apply: () => void; heuristic: number; value: Date } | null = null;
+		let bestHeuristic = -Infinity;
+		let daysWithBestHeuristic = 0;
+
+		// Evaluate each candidate day
+		for (const day of candidateDays) {
+			// Reset to backup state
+			this._datesSelected = [...tempDatesBackup];
+			this.datesSelected = this._datesSelected.slice();
+			this.grouping();
+
+			// Mark this day as vacation (reuse the day object since it's already normalized)
+			this.datesSelected.push(new SelectedDate(vacType, new DateRange<Date>(day, day)));
+
+			const heuristic = this.computeHeuristics();
+
+			// Track only if better than current best
+			if (heuristic > bestHeuristic) {
+				bestHeuristic = heuristic;
+				daysWithBestHeuristic = 1;
+				const capturedDay = day;
+				bestStrategy = {
+					apply: () => {
+						this._datesSelected = [...tempDatesBackup];
+						this.push(
+							new SelectedDate(
+								vacType,
+								new DateRange<Date>(capturedDay, capturedDay),
+							),
+						);
+					},
+					heuristic: heuristic,
+					value: capturedDay,
+				};
+			} else if (heuristic === bestHeuristic) {
+				daysWithBestHeuristic++;
+			}
+		}
+
+		// Check if too many days have the same best heuristic after evaluating all days
+		if (daysWithBestHeuristic > SelectedDates.MAX_DAYS_WITH_SAME_HEURISTIC) {
+			// Restore backup before stopping
+			this._datesSelected = [...tempDatesBackup];
+			this.datesSelected = this._datesSelected.slice();
+			this.grouping();
+
+			// Stop optimization - let user decide manually
+			return {
+				apply: () => {},
+				heuristic: SelectedDates.NO_VALID_STRATEGY_HEURISTIC,
+			};
+		}
+
+		// Restore backup before returning
+		this._datesSelected = [...tempDatesBackup];
+		this.datesSelected = this._datesSelected.slice();
+		this.grouping();
+
+		// Apply best strategy if found
+		if (bestStrategy) {
 			bestStrategy.apply();
 			return bestStrategy;
 		}
-		return { apply: () => {}, heuristic: -1 };
+
+		return { apply: () => {}, heuristic: SelectedDates.NO_VALID_STRATEGY_HEURISTIC };
 	}
 }
@@ -1,16 +1,45 @@
 import { TestBed } from '@angular/core/testing';
-
+import { provideZonelessChangeDetection } from '@angular/core';
 import { CalendarSettingsService } from './calendar-settings-service';

 describe('CalendarSettingsService', () => {
 	let service: CalendarSettingsService;

 	beforeEach(() => {
-		TestBed.configureTestingModule({});
+		TestBed.configureTestingModule({
+			providers: [provideZonelessChangeDetection()],
+		});
 		service = TestBed.inject(CalendarSettingsService);
 	});

 	it('should be created', () => {
 		expect(service).toBeTruthy();
 	});
+
+	it('should initialize with default values', () => {
+		expect(service.get('showWeekNumbers')()).toBe(false);
+		expect(service.get('samediMalin')()).toBe(true);
+	});
+
+	it('should allow updating showWeekNumbers', () => {
+		service.get('showWeekNumbers').set(true);
+		expect(service.get('showWeekNumbers')()).toBe(true);
+	});
+
+	it('should allow updating samediMalin', () => {
+		service.get('samediMalin').set(false);
+		expect(service.get('samediMalin')()).toBe(false);
+	});
+
+	it('should provide settings array for UI iteration', () => {
+		const settingsArray = service.settingsArray;
+		expect(settingsArray.length).toBe(2);
+		expect(settingsArray[0].id).toBe('showWeekNumbers');
+		expect(settingsArray[1].id).toBe('samediMalin');
+	});
+
+	it('should return correct descriptions', () => {
+		expect(service.getDescription('showWeekNumbers')).toBe('Afficher les numéros de semaine');
+		expect(service.getDescription('samediMalin')).toBe('Activer le Samedi Malin');
+	});
 });
@@ -1,9 +1,68 @@
-import { Injectable, signal } from '@angular/core';
+import { Injectable, WritableSignal, inject, Injector } from '@angular/core';
+import { storedSignal } from '../shared/utils/stored-signal';
+
+interface SettingDefinition {
+	defaultValue: boolean;
+	description: string;
+}

@Injectable({
 	providedIn: 'root',
 })
 export class CalendarSettingsService {
-	readonly showWeekNumbers = signal(false);
-	readonly samediMalin = signal(true);
+	private readonly injector = inject(Injector);
+
+	private readonly definitions = new Map<string, SettingDefinition>([
+		[
+			'showWeekNumbers',
+			{
+				defaultValue: false,
+				description: 'Afficher les numéros de semaine',
+			},
+		],
+		[
+			'samediMalin',
+			{
+				defaultValue: true,
+				description: 'Activer le Samedi Malin',
+			},
+		],
+	]);
+
+	private readonly signals = new Map<string, WritableSignal<boolean>>();
+
+	readonly settingsArray: ReadonlyArray<{
+		id: string;
+		signal: WritableSignal<boolean>;
+		description: string;
+	}>;
+
+	constructor() {
+		for (const [id, def] of this.definitions) {
+			const storageKey = `calendarSettings.${id}`;
+			this.signals.set(id, storedSignal(storageKey, def.defaultValue, this.injector));
+		}
+
+		this.settingsArray = Array.from(this.definitions.entries()).map(([id, def]) => ({
+			id,
+			signal: this.signals.get(id)!,
+			description: def.description,
+		}));
+	}
+
+	/**
+	 * Returns the signal for the given setting ID.
+	 * @throws Error if the setting ID doesn't exist
+	 */
+	get(id: string): WritableSignal<boolean> {
+		const signal = this.signals.get(id);
+		if (!signal) {
+			throw new Error(`Setting with id "${id}" does not exist`);
+		}
+		return signal;
+	}
+
+	getDescription(id: string): string {
+		return this.definitions.get(id)?.description ?? '';
+	}
 }
@@ -0,0 +1,63 @@
+import { TestBed } from '@angular/core/testing';
+import { provideZonelessChangeDetection } from '@angular/core';
+import { DateCacheService } from './date-cache.service';
+
+describe('DateCacheService', () => {
+	let service: DateCacheService;
+
+	beforeEach(() => {
+		TestBed.configureTestingModule({
+			providers: [provideZonelessChangeDetection()],
+		});
+		service = TestBed.inject(DateCacheService);
+	});
+
+	it('should be created', () => {
+		expect(service).toBeTruthy();
+	});
+
+	it('should cache today date', () => {
+		const today1 = service.getToday();
+		const today2 = service.getToday();
+		expect(today1).toBe(today2); // Same reference
+	});
+
+	it('should cache today components', () => {
+		const components1 = service.getTodayComponents();
+		const components2 = service.getTodayComponents();
+		expect(components1).toBe(components2); // Same reference
+	});
+
+	it('should cache current month', () => {
+		const month1 = service.getCurrentMonth();
+		const month2 = service.getCurrentMonth();
+		expect(month1).toBe(month2);
+	});
+
+	it('should cache current year', () => {
+		const year1 = service.getCurrentYear();
+		const year2 = service.getCurrentYear();
+		expect(year1).toBe(year2);
+	});
+
+	it('should clear cache', () => {
+		const year1 = service.getCurrentYear();
+		service.clearCache();
+		const year2 = service.getCurrentYear();
+		expect(year1).toBe(year2); // Values should be the same even after clearing
+	});
+
+	it('should return today with time normalized to 00:00:00.000', () => {
+		const today = service.getToday();
+		expect(today.getHours()).toBe(0);
+		expect(today.getMinutes()).toBe(0);
+		expect(today.getSeconds()).toBe(0);
+		expect(today.getMilliseconds()).toBe(0);
+	});
+
+	it('should return getNow() same as getToday()', () => {
+		const now = service.getNow();
+		const today = service.getToday();
+		expect(now).toBe(today);
+	});
+});
@@ -0,0 +1,105 @@
+import { Injectable } from '@angular/core';
+
+/**
+ * Service to cache and provide commonly used date values.
+ * This reduces redundant Date object creation across the application.
+ */
+@Injectable({
+	providedIn: 'root',
+})
+export class DateCacheService {
+	private _today: Date | null = null;
+	private _todayComponents: { date: number; month: number; year: number } | null = null;
+	private _currentMonth: number | null = null;
+	private _currentYear: number | null = null;
+
+	/**
+	 * Get today's date (time set to 00:00:00.000)
+	 */
+	getToday(): Date {
+		if (!this._today || this.isNewDay(this._today)) {
+			this._today = new Date();
+			this._today.setHours(0, 0, 0, 0);
+			this._todayComponents = null; // Invalidate components cache
+		}
+		return this._today;
+	}
+
+	/**
+	 * Get today's date components (date, month, year) for efficient comparison
+	 */
+	getTodayComponents(): { date: number; month: number; year: number } {
+		if (!this._todayComponents || (this._today && this.isNewDay(this._today))) {
+			const today = this.getToday();
+			this._todayComponents = {
+				date: today.getDate(),
+				month: today.getMonth(),
+				year: today.getFullYear(),
+			};
+		}
+		return this._todayComponents;
+	}
+
+	/**
+	 * Get current month (0-11)
+	 */
+	getCurrentMonth(): number {
+		if (this._currentMonth === null || this.isNewMonth()) {
+			this._currentMonth = new Date().getMonth();
+		}
+		return this._currentMonth;
+	}
+
+	/**
+	 * Get current year
+	 */
+	getCurrentYear(): number {
+		if (this._currentYear === null || this.isNewYear()) {
+			this._currentYear = new Date().getFullYear();
+		}
+		return this._currentYear;
+	}
+
+	/**
+	 * Get current date with time set to 00:00:00.000 (alias for getToday)
+	 */
+	getNow(): Date {
+		return this.getToday();
+	}
+
+	/**
+	 * Check if a cached date is from a previous day
+	 */
+	private isNewDay(cachedDate: Date): boolean {
+		const now = new Date();
+		return (
+			cachedDate.getDate() !== now.getDate() ||
+			cachedDate.getMonth() !== now.getMonth() ||
+			cachedDate.getFullYear() !== now.getFullYear()
+		);
+	}
+
+	/**
+	 * Check if we're in a new month
+	 */
+	private isNewMonth(): boolean {
+		return this._currentMonth !== null && this._currentMonth !== new Date().getMonth();
+	}
+
+	/**
+	 * Check if we're in a new year
+	 */
+	private isNewYear(): boolean {
+		return this._currentYear !== null && this._currentYear !== new Date().getFullYear();
+	}
+
+	/**
+	 * Clear all caches (useful for testing)
+	 */
+	clearCache(): void {
+		this._today = null;
+		this._todayComponents = null;
+		this._currentMonth = null;
+		this._currentYear = null;
+	}
+}
@@ -1,16 +1,42 @@
 import { TestBed } from '@angular/core/testing';
-
+import { provideZonelessChangeDetection } from '@angular/core';
 import { ThemeService } from './theme-service';

 describe('ThemeService', () => {
-  let service: ThemeService;
+	let service: ThemeService;

-  beforeEach(() => {
-    TestBed.configureTestingModule({});
-    service = TestBed.inject(ThemeService);
-  });
+	beforeEach(() => {
+		TestBed.configureTestingModule({
+			providers: [provideZonelessChangeDetection()],
+		});
+		service = TestBed.inject(ThemeService);
+	});

-  it('should be created', () => {
-    expect(service).toBeTruthy();
-  });
+	it('should be created', () => {
+		expect(service).toBeTruthy();
+	});
+
+	it('should initialize with system preference', () => {
+		expect(service.isLightMode()).toBeDefined();
+	});
+
+	it('should toggle theme', () => {
+		const initialMode = service.isLightMode();
+		service.toggleTheme();
+		expect(service.isLightMode()).toBe(!initialMode);
+	});
+
+	it('should force light mode when specified', () => {
+		service.toggleTheme(true);
+		expect(service.isLightMode()).toBe(true);
+		expect(document.body.classList.contains('light-mode')).toBe(true);
+		expect(document.body.classList.contains('dark-mode')).toBe(false);
+	});
+
+	it('should force dark mode when specified', () => {
+		service.toggleTheme(false);
+		expect(service.isLightMode()).toBe(false);
+		expect(document.body.classList.contains('light-mode')).toBe(false);
+		expect(document.body.classList.contains('dark-mode')).toBe(true);
+	});
 });
@@ -1,16 +1,57 @@
 import { TestBed } from '@angular/core/testing';
-
+import { provideZonelessChangeDetection } from '@angular/core';
 import { UserInputService } from './user-input-service';
+import { SelectableDayType, VacDay } from './calendar-service';

-describe('UserInput', () => {
+describe('UserInputService', () => {
 	let service: UserInputService;

 	beforeEach(() => {
-		TestBed.configureTestingModule({});
+		TestBed.configureTestingModule({
+			providers: [provideZonelessChangeDetection()],
+		});
 		service = TestBed.inject(UserInputService);
 	});

 	it('should be created', () => {
 		expect(service).toBeTruthy();
 	});
+
+	it('should initialize with vacation days array', () => {
+		const vacations = service.vacationNumberSignal();
+		expect(Array.isArray(vacations)).toBe(true);
+		expect(vacations.length).toBeGreaterThan(0);
+	});
+
+	it('should have vacation days with valid properties', () => {
+		const vacations = service.vacationNumberSignal();
+		vacations.forEach((day) => {
+			expect(day.id).toBeDefined();
+			expect(day.type).toBeDefined();
+			expect(day.numberOfDays).toBeGreaterThanOrEqual(1);
+			expect(day.numberOfDays).toBeLessThanOrEqual(9);
+			expect(day.expiryDate).toBeInstanceOf(Date);
+		});
+	});
+
+	it('should update vacation number signal', () => {
+		const newVacations: VacDay[] = [
+			{
+				id: 'test-id',
+				type: SelectableDayType.CP,
+				numberOfDays: 5,
+				expiryDate: new Date(),
+			},
+		];
+		service.vacationNumberSignal.set(newVacations);
+		expect(service.vacationNumberSignal()).toEqual(newVacations);
+	});
+
+	it('should create a new vacation day', () => {
+		const newDay = service.createVacationDay();
+		expect(newDay.id).toBeDefined();
+		expect(newDay.type).toBe(SelectableDayType.CP);
+		expect(newDay.numberOfDays).toBe(1);
+		expect(newDay.expiryDate).toBeInstanceOf(Date);
+	});
 });
@@ -1,5 +1,5 @@
-import { Injectable, signal, PLATFORM_ID, inject } from '@angular/core';
-import { VacationsNumber } from './calendar-service';
+import { Injectable, signal } from '@angular/core';
+import { SelectableDayType, VacDay } from './calendar-service';

@Injectable({
 	providedIn: 'root',
@@ -9,13 +9,39 @@ export class UserInputService {
 		return Math.floor(Math.random() * 9) + 1;
 	}

-	private getInitialValues(): VacationsNumber {
+	private getInitialValues(): VacDay[] {
+		return [
+			{
+				id: crypto.randomUUID(),
+				type: SelectableDayType.CP,
+				numberOfDays: this.getRandomNumber(),
+				// today + 365 days
+				expiryDate: new Date(new Date().setFullYear(new Date().getFullYear() + 1)),
+			},
+			{
+				id: crypto.randomUUID(),
+				type: SelectableDayType.RTT,
+				numberOfDays: this.getRandomNumber(),
+				expiryDate: new Date(new Date().setFullYear(new Date().getFullYear() + 1)),
+			},
+			{
+				id: crypto.randomUUID(),
+				type: SelectableDayType.OTHER,
+				numberOfDays: this.getRandomNumber(),
+				expiryDate: new Date(new Date().setFullYear(new Date().getFullYear() + 1)),
+			},
+		];
+	}
+
+	public createVacationDay(): VacDay {
 		return {
-			cp: this.getRandomNumber(),
-			rtt: this.getRandomNumber(),
-			other: this.getRandomNumber(),
+			id: crypto.randomUUID(),
+			type: SelectableDayType.CP,
+			numberOfDays: 1,
+			expiryDate: new Date(new Date().setFullYear(new Date().getFullYear() + 1)),
 		};
 	}

-	readonly vacationNumberSignal = signal<VacationsNumber>(this.getInitialValues());
+	readonly vacationNumberSignal = signal<VacDay[]>(this.getInitialValues());
+	readonly remainingVacationDaysSignal = signal<VacDay[]>([]);
 }
@@ -1,12 +1,14 @@
 import { TestBed } from '@angular/core/testing';
-
+import { provideZonelessChangeDetection } from '@angular/core';
 import { UserSettingsService } from './user-settings-service';

 describe('UserSettingsService', () => {
 	let service: UserSettingsService;

 	beforeEach(() => {
-		TestBed.configureTestingModule({});
+		TestBed.configureTestingModule({
+			providers: [provideZonelessChangeDetection()],
+		});
 		service = TestBed.inject(UserSettingsService);
 	});

@@ -0,0 +1,111 @@
+import { signal, effect, WritableSignal, Injector, runInInjectionContext } from '@angular/core';
+
+/**
+ * Checks if localStorage is available in the current environment.
+ * @returns true if localStorage is accessible, false otherwise
+ */
+function isLocalStorageAvailable(): boolean {
+	try {
+		return typeof localStorage !== 'undefined' && localStorage !== null;
+	} catch {
+		return false;
+	}
+}
+
+/**
+ * Creates a signal that automatically persists its value to localStorage.
+ *
+ * The signal will:
+ * - Initialize with the stored value from localStorage if available
+ * - Fall back to the provided initial value if no stored value exists or parsing fails
+ * - Automatically sync changes to localStorage with debouncing (300ms delay)
+ * - Work safely in SSR and environments where localStorage is unavailable
+ *
+ * @template T - The type of value stored in the signal (must be JSON-serializable)
+ * @param key - The localStorage key used to store the value
+ * @param initialValue - The default value used when no stored value exists
+ * @param injector - The Angular injector (use inject(Injector) to get current context)
+ * @param debounceMs - Optional debounce delay in milliseconds (default: 300ms)
+ * @returns A writable signal that persists to localStorage
+ *
+ * @example
+ * ```typescript
+ * const injector = inject(Injector);
+ * const darkMode = storedSignal('theme.darkMode', false, injector);
+ * darkMode.set(true); // Automatically saved to localStorage after 300ms
+ * console.log(darkMode()); // true
+ * ```
+ *
+ * @remarks
+ * - Requires an Injector to create the effect in the proper context
+ * - Values must be JSON-serializable (no functions, circular references, etc.)
+ * - In SSR or when localStorage is unavailable, the signal works normally but won't persist
+ * - Corrupted localStorage data is automatically cleared and reset to initial value
+ * - localStorage writes are debounced to improve performance with frequent updates
+ */
+export function storedSignal<T>(
+	key: string,
+	initialValue: T,
+	injector: Injector,
+	debounceMs = 300,
+): WritableSignal<T> {
+	let parsedValue = initialValue;
+
+	if (isLocalStorageAvailable()) {
+		try {
+			const storedValue = localStorage.getItem(key);
+			if (storedValue) {
+				parsedValue = JSON.parse(storedValue) as T;
+			}
+		} catch (error) {
+			console.warn(
+				`Failed to parse stored value for key "${key}". Using initial value.`,
+				error,
+			);
+			try {
+				localStorage.removeItem(key);
+			} catch {
+				// Ignore removal errors
+			}
+		}
+	}
+
+	const s = signal(parsedValue);
+
+	let timeoutId: ReturnType<typeof setTimeout> | null = null;
+	let isFirstRun = true;
+
+	runInInjectionContext(injector, () => {
+		effect(() => {
+			const value = s();
+
+			// Skip the first execution to avoid writing back what we just read
+			if (isFirstRun) {
+				isFirstRun = false;
+				return;
+			}
+
+			// Clear any pending timeout
+			if (timeoutId !== null) {
+				clearTimeout(timeoutId);
+			}
+
+			// Debounce the localStorage write
+			timeoutId = setTimeout(() => {
+				if (isLocalStorageAvailable()) {
+					try {
+						localStorage.setItem(key, JSON.stringify(value));
+					} catch (error) {
+						console.warn(
+							`Failed to save value for key "${key}" to localStorage.`,
+							error,
+						);
+					}
+				}
+				timeoutId = null;
+			}, debounceMs);
+		});
+	});
+
+	return s;
+}
@@ -1,18 +1,19 @@
 <!doctype html>
 <html lang="en">
-
 	<head>
-		<meta charset="utf-8">
+		<meta charset="utf-8" />
 		<title>VacOptimizer</title>
-		<base href="/">
-		<meta name="viewport" content="width=device-width, initial-scale=1">
-		<link rel="icon" type="image/x-icon" href="favicon.ico">
-		<link href="https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500&display=swap" rel="stylesheet">
-		<link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
+		<base href="/" />
+		<meta name="viewport" content="width=device-width, initial-scale=1" />
+		<link rel="icon" type="image/x-icon" href="favicon.ico" />
+		<link
+			href="https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500&display=swap"
+			rel="stylesheet"
+		/>
+		<link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet" />
 	</head>

 	<body>
 		<app-root></app-root>
 	</body>
-
-</html>
+</html>
@@ -2,7 +2,6 @@ import { BootstrapContext, bootstrapApplication } from '@angular/platform-browse
 import { App } from './app/app';
 import { config } from './app/app.config.server';

-const bootstrap = (context: BootstrapContext) =>
-	bootstrapApplication(App, config, context);
+const bootstrap = (context: BootstrapContext) => bootstrapApplication(App, config, context);

 export default bootstrap;
@@ -2,5 +2,4 @@ import { bootstrapApplication } from '@angular/platform-browser';
 import { appConfig } from './app/app.config';
 import { App } from './app/app';

-bootstrapApplication(App, appConfig)
-	.catch((err) => console.error(err));
+bootstrapApplication(App, appConfig).catch((err) => console.error(err));
@@ -41,9 +41,7 @@ app.use(
 app.use((req, res, next) => {
 	angularApp
 		.handle(req)
-		.then((response) =>
-			response ? writeResponseToNodeResponse(response, res) : next(),
-		)
+		.then((response) => (response ? writeResponseToNodeResponse(response, res) : next()))
 		.catch(next);
 });