Deckard v0.4.1

Fixes same-document SPA scanning in Chrome, uses the description 'Local AI-text detection for your browser.', and starts fresh installations On when Chrome grants the declared HTTP/HTTPS website access. Explicitly saved Off settings remain Off. Includes safe in-place upgrades and uninstall ownership for Deckard 0.4.0. Model, threshold and 50-word minimum are unchanged. Apple Silicon macOS 15+; ad-hoc signed, not Developer ID signed or notarized.