[Task] Cookie extraction on Windows

[shellen]

Part of: [Epic] Add Windows support (#66)

Summary

Cookie extraction is currently macOS-only (Safari + Chrome binary cookie parsing). Decide whether to skip on Windows or add Chrome cookie support with Windows-specific SQLite paths.

Current State

• Safari cookies: macOS-only, no Windows equivalent (Safari doesn't exist on Windows)
• Chrome cookies: Currently uses macOS-specific SQLite paths and binary cookie format

Options

1. Add Windows Chrome cookie support: Different SQLite path on Windows, same general approach
2. Skip cookie extraction on Windows: Disable the feature gracefully, document limitation
3. Add Edge cookie support: Edge uses Chromium, similar cookie storage to Chrome

Acceptance Criteria

• Decision made on Windows cookie approach
• Feature either works on Windows or is gracefully disabled
• No crashes or confusing UX on Windows when cookie feature is accessed

Estimate: ~0.5–1 day