Complete Python Task Manager

I already coded the front-end of a simple task-manager in Python and have uploaded all current files for you. I now need the back-end logic brought to life so the app is fully usable.

Here’s what still needs doing:
• Hook up the existing login page so users can authenticate and reach the dashboard.
• Build a clean “Create Task” flow (form, validation, save).
• Store everything in a lightweight SQLite database that ships with the project.
• Add three role levels—Admin, Regular user and Guest—so permissions are enforced automatically (e.g., only Admins manage all tasks, Guests view-only).

I’m keeping the stack simple: pure Python, standard libraries where possible, and SQLite for data. The UI files are ready; you can refactor them if it helps but please keep their visual layout intact.

Deliverables:
1. Updated Python codebase with integrated login, task creation and role checks.
2. A small README explaining setup, database initialization and how each role behaves.
3. Screenshots or a short screencast proving everything works locally.

If you’re comfortable wiring up authentication, CRUD operations and basic role-based access control in Python, this should be a straightforward build.