OPDS protocol URLs and LCPL file associations not working on Windows

[bjnoel]

Description

When clicking opds:// URLs in a browser on Windows, Thorium Reader opens but fails to import the OPDS catalog. Similarly, double-clicking .lcpl files while Thorium is running focuses the app but doesn't open the file.

Steps to Reproduce

1. Run Thorium in development mode (npm run start:dev)
2. Click an OPDS URL in browser (e.g., opds://gateway.ebooks.land/library/v1/library)
3. Thorium opens/focuses but the catalog is not imported

Expected Behavior

The OPDS catalog should be automatically imported and displayed

Actual Behavior

Thorium opens but nothing happens - no catalog import

Environment

• OS: Windows 10/11
• Thorium Version: 3.2.0-alpha.1 (development mode)
• Node Version: 22.x

Root Cause

Windows passes protocol URLs and file paths as command-line arguments to the second instance, but these weren't being properly extracted from the argv array in development mode.