v0.1.2

• glowy guide and glowy preview FILE so agents can check how their Markdown will look before handing it over.
• Remembers the width you read at; guide and preview use it (default 120).
• No longer hangs when run from agent shells or scripts with a file argument.
• Width measured in terminal columns; a left-to-right flowchart that fails to draw is redrawn top-to-bottom.