GCD Usage 0.2.0

GCD Usage 0.2.0 adds browser-export imports, in-app sign-in progress, and device delivery reports for shared-folder history.

• Import supported Claude and ChatGPT conversation JSON without an extension. Short previews and available model metadata are retained; exact browser token consumption remains unknown.
• Check existing sign-ins before starting the provider's browser flow. The sign-in helper runs without a terminal window. Organization SSO requires a supported account.
• See folder checks and reported delivery to other computers in Settings when shared-folder synchronization is configured.
• Keep the black theme, percentage-left meters, adjustable fonts, unlocked Windows strip, and flexible time-interval statistics.

Windows x64 and ARM64, macOS Intel and Apple Silicon packages are included. These are unsigned/ad-hoc-signed personal preview builds. Updates are manual.

Validation: platform unit tests and frontend checks passed; Windows native checks covered live connections, history filters, interval accounting, hidden sign-in controls, settings persistence, and security boundaries. Both Mac builds passed background-launch checks. Interactive organization SSO and physical Mac display behavior require target-device validation.

Update every computer to 0.2.0 before synchronizing the new browser-history records. See README for setup and privacy information. SHA256SUMS.txt contains package checksums.