T hoguet/issue16 (#61)

* feat: enhance loading spinner with progress indication and add warning for unplaced vacation days

* feat: upgrade Angular dependencies to version 21 and implement new animation features

- Updated Angular dependencies in package.json to version 21.x.x.
- Added `provideAnimationsAsync` to app configuration for improved animation handling.
- Refactored user input component to utilize a dynamic list of vacation days with animations.
- Introduced a new `DayInput` component for managing individual vacation days.
- Enhanced styling and animations for user input and day input components.
- Updated calendar service to support new vacation day structure.
- Adjusted tests to accommodate changes in component structure and dependencies.

* feat: enhance vacation optimization logic and UI components

* Fix signal immutability violations and cleanup unused code (#62)

* Initial plan

* fix: address PR review comments for signal immutability and cleanup

Co-authored-by: THoguet <61246905+THoguet@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: THoguet <61246905+THoguet@users.noreply.github.com>

* fix: add --legacy-peer-deps for Angular 21 compatibility (#63)

* Initial plan

* fix: add --legacy-peer-deps to npm ci for Angular 21 compatibility

Co-authored-by: THoguet <61246905+THoguet@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: THoguet <61246905+THoguet@users.noreply.github.com>

* Fix unit tests for VacDay[] type migration (#64)

* Initial plan

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

Co-authored-by: THoguet <61246905+THoguet@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: THoguet <61246905+THoguet@users.noreply.github.com>

---------

Co-authored-by: Copilot <198982749+Copilot@users.noreply.github.com>

.github/workflows/pr-validation.yml

@@ -20,7 +20,7 @@ jobs:
                   cache: 'npm'
 
             - name: Install dependencies
-              run: npm ci
+              run: npm ci --legacy-peer-deps
 
             - name: Check code formatting with Prettier
               run: npx prettier --check "src/**/*.{ts,html,scss,css,json}"
@@ -41,7 +41,7 @@ jobs:
                   cache: 'npm'
 
             - name: Install dependencies
-              run: npm ci
+              run: npm ci --legacy-peer-deps
 
             - name: Run TypeScript compiler
               run: npx tsc --noEmit
@@ -59,7 +59,7 @@ jobs:
                   cache: 'npm'
 
             - name: Install dependencies
-              run: npm ci
+              run: npm ci --legacy-peer-deps
 
             - name: Run unit tests
               run: npm test -- --watch=false --browsers=ChromeHeadless --code-coverage
@@ -85,7 +85,7 @@ jobs:
                   cache: 'npm'
 
             - name: Install dependencies
-              run: npm ci
+              run: npm ci --legacy-peer-deps
 
             - name: Build production bundle
               run: npm run build -- --configuration production