Create a Python Flask web app named "LawMate" for personal use by a law student.

The app should have the following features:

1. Homepage:

   • Displays a list of legal articles (e.g., Article 89, Article 128 from the Constitution of Pakistan).
   • Each article item should include:
     • Article number
     • Article title
     • Short preview (first few lines of content)
     • "Read More" button

2. Search Function:

   • Add a search bar on the homepage to filter articles by article number or any keyword in the title/content.

3. Article Detail Page:

   • Clicking "Read More" opens a new page showing the full content of the selected article.
   • Include a "Bookmark" button that saves the article (in-session or in-memory, no user accounts needed).

4. Bookmarks Page:

   • A separate page that shows all bookmarked articles.
   • Add a "Remove Bookmark" button for each.

5. Categorization:

   • Each article has a category field: e.g., "Constitution", "Criminal Law", "Civil Law".
   • Add a dropdown filter on the homepage to show articles by category.

6. Data Storage:

   • Article data should be stored in a Python dictionary (not in a database).
   • Example format: articles = { "89": { "title": "Power of President to Promulgate Ordinances", "category": "Constitution", "content": "Full content here..." }, "128": { "title": "Power of Governor to Promulgate Ordinances", "category": "Constitution", "content": "Full content here..." } }

7. User Interface:

   • Use Bootstrap 5 for responsive, clean UI.
   • Keep the design simple and mobile-friendly.

8. Technical Notes:

   • No login system is required.
   • Store bookmarks using Flask session or a simple in-memory structure.
   • Run the app locally (no deployment required).

Please include:

• Python Flask backend with route handling
• Basic HTML templates using Jinja2 (for homepage, article view, and bookmarks)
• Minimal CSS using Bootstrap classes