v0.2.0 — Screenshot OCR Translation

🆕 What's New

• Screenshot OCR Translation — Press Ctrl+Shift+O to capture any screen region, extract text, and translate it
• Window auto-hides during capture, restores after
• Uses Tesseract.js for OCR (no system dependencies)
• Works natively on GNOME Wayland via gnome-screenshot
• Cancel capture with Escape key or Cancel button

🐛 Fixes

• Capture error messages now show the real Rust error instead of generic "Capture failed."
• Added required window permissions (hide/show/set-focus) for Wayland compatibility