fix: replace redundant import with explicit tk alias

[arawrdn]

GM,

Fixed redundant dual import (from tkinter import * + import tkinter as tk) that caused tk to shadow the module—tk.Tk() was invalid since tk resolved to the Tk class, not the module. Refactored to single import tkinter as tk for explicit, unambiguous access.

Why: * imports pollute the global namespace, risk name collisions, and add runtime overhead. Explicit tk. prefix improves readability, avoids shadowing, and aligns with Python best practices (PEP 8). Gas-heavy? Nah—just clean, predictable, and maintainable.

Regards,