Interactive installation wizard in TUI

[ShaikhWarsi]

Fixes #58

Summary of Features

• Multi-Step Guided Setup : A structured flow consisting of Version Selection, Installer Selection, Advanced Options, and Final Confirmation.
• Advanced Configuration :
  • Build Options : Support for source builds and performance optimizations (Linux).
  • Custom Installation Path : Ability for users to specify a non-default directory for Python installations.
  • Environment Management : Option to automatically add Python to the system PATH (Windows).
• Interactive UI : Built using textual widgets like RadioSet , Checkbox , and Input for a modern, responsive terminal experience.
• TUI Integration : Seamlessly launched from the main management screen when a user initiates a new installation

[shreyasmene06]

Excellent implementation of the installation wizard! This is a well-designed feature with a clean multi-step flow.

• Proper multi-step wizard (Version → Installer → Options → Confirm)
• Platform-aware options (Linux source build, Windows PATH)
• Clean integration with existing plugin system
• Good UX with Back/Next/Cancel navigation
• Properly passes **kwargs through the installer chain
• Deleted pycache directories (good hygiene)

Minor Issues (non-blocking)

1. Fix line endings in wizard.py

The file uses Windows CRLF (\r\n) line endings while the rest of the codebase uses Unix LF (\n). Please normalize:

sed -i 's/\r$//' src/pyvm_updater/wizard.py

2. Consider adding version validation
   In next_step(), when collecting the version, you could validate the format:

if self.current_step_idx == 0:
    ver = self.query_one("#version-input", Input).value.strip()
    if not ver or not re.match(r"^\d+\.\d+\.\d+$", ver):
        # Show error to user
        return
    self.options["version"] = ver

3. Tests would be nice (optional, can be follow-up)
   The wizard logic could be unit tested, especially:

• Step navigation
• Option collection
• Confirm details formatting

Summary
This is a solid feature that significantly improves the user experience for Python installation. The wizard makes advanced options accessible while keeping the default path simple.
LGTM! 🎉

[shreyasmene06]

Thanks for adding the version validation! The implementation now includes:

• Regex validation for version format (X.Y.Z)
• Visual feedback with red border on invalid input
• Border reset when valid
  The wizard feature is complete and well-implemented.

One remaining minor issue (non-blocking)

CRLF line endings in wizard.py
The file still uses Windows CRLF (\r\n) line endings. This won't break functionality but is inconsistent with the codebase. You can fix with:

sed -i 's/\r$//' src/pyvm_updater/wizard.py

Or configure your editor to use LF line endings.

I'm approving since the CRLF issue is cosmetic and doesn't affect functionality. Great feature addition!