Despite some mixed signals, housing appears to be on the mend. That could be a decent harbinger for DIY home-improvement hangout Home Depot (HD), which reports Tuesday morning. And people fixing up homes will likely want to decorate them as well. That's upscale home-decor chain Williams-Sonoma's (WSM) specialty. Analysts expect Home Depot to post a 17% hike in EPS to 70 cents. Revenue is expected to climb 3.4% to $17.91 billion. Rival home