Being the editor of a major-market daily has not been a great title in recent decades, as it has involved presiding over endless budget cuts and series after series of staff buyouts and layoffs. Add bankruptcy, at the Star Tribune. But Rene Sanchez, a Washington Post alum who took over from Nancy Barnes last year, may be one of the lucky ones. His paper’s costs already are Chapter 11-slimmed, reader and revenue erosion is modest as dailies go, and it has, in Glen Taylor, a new owner more focused on community than earnings. Sanchez’s challenge is to maintain the paper’s recent dynamism and manage the inevitable atrophy.