Add permission-gated PowerShell download flow in HTML UI

[ReedonMenu]

Motivation

• Ensure the web UI explicitly requests user consent before downloading a generated PowerShell script for making local backups and centralize file-type validation for safety and clearer UX.

Description

• Updated index.html to add a COPY AS POWERSHELL (.ps1) button, introduce validateGameFilePath shared validation, prompt the user with confirm before download, and generate a .ps1 script via a Blob URL that copies the specified source into a backups folder next to the script.
• Added a local CLI module roblox_game_copier.py that provides API-key generation/validation and a copy_game_file implementation for creating timestamped backups of .rbxl/.rbxlx files.
• Added unit tests in test_roblox_game_copier.py, a small script.js and styles.css for the UI, and README updates describing the web UI and CLI usage.
• Preserved existing tab navigation and the friend-join helper behavior in the Features panel.

Testing

• Ran python3 -m unittest -v and both tests test_generate_and_validate_key and test_copy_game_file passed (OK).
• Ran an automated Playwright browser script that loaded the served index.html, filled a local file path, accepted the permission prompt, clicked the PowerShell download button, and captured a screenshot; the script completed successfully.

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Codex Task

[vercel]

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Project	Deployment	Actions	Updated (UTC)
game-copier	Ready	Preview, Comment	Feb 20, 2026 1:07pm