0.1.3

Unify plugin settings and prepare Obsidian community plugin release.\n\n- The Obsidian settings tab now includes UAPI key, language, accent, voice filter, reader, sample playback, mode, rate, premium usage, and sign-in in one page.\n- The reader modal also includes UAPI key entry.\n- Adds versions.json for Obsidian community plugin compatibility.\n- Release tag matches manifest version without a v prefix.