feat: make notes keep open when suddenly closed (#7)

## What

- New feature allowing open notes to be restore, if the tab is closed

## Why

- Making users' life easier

## Mood
<img width="200" src="https://media3.giphy.com/media/S5uASkxZ5eGcwf2vHM/giphy.gif?cid=36b14facu3gasrwzy8axqb43wcuo1tsdjvjcslyk9t9jzvab&ep=v1_gifs_search&rid=giphy.gif&ct=g"/>

Reviewed-on: #7

client/src/__test__/views/Home.test.tsx

@@ -55,7 +55,19 @@ vi.mock('../../components/AlertError', () => ({
 }));
 
 vi.mock('../../components/ModalMarkdown', () => ({
-  default: (props: any) => <div data-testid="modal-markdown">{props.show ? 'Modal Open' : ''}</div>
+  default: (props: any) => (
+    <div data-testid="modal-markdown">
+      {props.show ? (
+        <div>
+          <div data-testid="modal-title">{props.title}</div>
+          <div data-testid="modal-content">{props.markdownText}</div>
+          <button data-testid="modal-close" onClick={props.onHide}>Close</button>
+        </div>
+      ) : (
+        ''
+      )}
+    </div>
+  )
 }));
 
 vi.mock('../../components/TaskTitle', () => ({
@@ -67,7 +79,14 @@ vi.mock('../../components/TaskTimeLeft', () => ({
 }));
 
 vi.mock('../../components/TaskTag', () => ({
-  default: (props: any) => <div data-testid="task-tag">{props.tag}</div>
+  default: (props: any) => (
+    <div data-testid="task-tag">
+      {props.tag}
+      {props.taskOrNote === 'note' && props.onClick && (
+        <a href="#" data-testid="open-it" onClick={props.onClick}>Open it</a>
+      )}
+    </div>
+  )
 }));
 
 vi.mock('../../components/NoteTitle', () => ({
@@ -545,6 +564,79 @@ describe('Home Component', () => {
       expect(screen.getAllByTestId('task-title')[0].textContent).toBe('Task 1');
     });
   });
+
+  test('saves note ID to localStorage when opening modal', async () => {
+    await act(async () => {
+      renderHome();
+    });
+
+    await waitFor(() => {
+      expect(screen.getAllByTestId('open-it').length).toBe(2);
+    });
+
+    const openItLinks = screen.getAllByTestId('open-it');
+    await act(async () => {
+      fireEvent.click(openItLinks[1]);
+    });
+
+    expect(localStorage.getItem('OPEN_NOTE_ID')).toBe('1');
+    expect(screen.getByTestId('modal-title').textContent).toBe('Note 1');
+    expect(screen.getByTestId('modal-content').textContent).toBe('Line 1\nLine 2\nLine 3');
+  });
+
+  test('restores open note modal from localStorage on reload', async () => {
+    localStorage.setItem('OPEN_NOTE_ID', '2');
+
+    await act(async () => {
+      renderHome();
+    });
+
+    await waitFor(() => {
+      expect(screen.getByTestId('modal-title').textContent).toBe('Note 2');
+    });
+
+    expect(screen.getByTestId('modal-content').textContent).toBe('This is a sample\nnote content');
+  });
+
+  test('does not restore modal if localStorage note ID not found', async () => {
+    localStorage.setItem('OPEN_NOTE_ID', '999');
+
+    await act(async () => {
+      renderHome();
+    });
+
+    await waitFor(() => {
+      expect(screen.getAllByTestId('note-title').length).toBe(2);
+    });
+
+    const modal = screen.getByTestId('modal-markdown');
+    expect(modal.textContent).toBe('');
+    expect(localStorage.getItem('OPEN_NOTE_ID')).toBeNull();
+  });
+
+  test('clears localStorage when closing modal', async () => {
+    await act(async () => {
+      renderHome();
+    });
+
+    await waitFor(() => {
+      expect(screen.getAllByTestId('open-it').length).toBe(2);
+    });
+
+    const openItLinks = screen.getAllByTestId('open-it');
+    await act(async () => {
+      fireEvent.click(openItLinks[1]);
+    });
+
+    expect(localStorage.getItem('OPEN_NOTE_ID')).toBe('1');
+
+    const closeButton = screen.getByTestId('modal-close');
+    await act(async () => {
+      fireEvent.click(closeButton);
+    });
+
+    expect(localStorage.getItem('OPEN_NOTE_ID')).toBeNull();
+  });
   /*
   test('getFirstRows properly formats note preview', async () => {
     await act(async () => {

client/src/views/Home/index.tsx

@@ -28,6 +28,8 @@ import TaskTimeLeft from '../../components/TaskTimeLeft';
 import TaskTag from '../../components/TaskTag';
 import NoteTitle from '../../components/NoteTitle';
 
+const OPEN_NOTE_ID_KEY = 'OPEN_NOTE_ID';
+
 /**
  * Home page component.
  *
@@ -299,7 +301,10 @@ function Home(): React.ReactNode {
     return preview.join('\n');
   };
 
-  const handleCloseModal = () => setShowMarkdownView(false);
+  const handleCloseModal = () => {
+    setShowMarkdownView(false);
+    localStorage.removeItem(OPEN_NOTE_ID_KEY);
+  };
 
   const getSelectedLabel = (): string => {
     if (selectedOption === 'everything') return t('home_radio_everything');
@@ -345,6 +350,22 @@ function Home(): React.ReactNode {
     applyFilter(filterText, selectedOption, savedTasks, savedNotes);
   }, [savedTasks, savedNotes, filterText, selectedOption]);
 
+  useEffect(() => {
+    const openNoteId = localStorage.getItem(OPEN_NOTE_ID_KEY);
+    if (openNoteId && notes.length > 0) {
+      const noteId = Number(openNoteId);
+      const foundNote = notes.find(n => n.id === noteId);
+      if (foundNote) {
+        setModalTitle(foundNote.title);
+        setModalContent(foundNote.description);
+        setShowMarkdownView(true);
+      }
+      else {
+        localStorage.removeItem(OPEN_NOTE_ID_KEY);
+      }
+    }
+  }, [notes]);
+
   return (
     <Container fluid>
       <ContentHeader
@@ -602,6 +623,7 @@ function Home(): React.ReactNode {
                     setModalTitle(note.title);
                     setModalContent(note.description);
                     setShowMarkdownView(true);
+                    localStorage.setItem(OPEN_NOTE_ID_KEY, note.id.toString());
                   }}
                 />
               </Card.Footer>