Dashboard calendar and inbox numbers now match their cards

Posts on the calendar now counts only dated posts in the next 7 days in America/St_Vincent — the same window as the card below it. Messages waiting, the header bell, and the Inbox badge all count unanswered inbound Instagram and Facebook replies, not every unread row, and say so. The collapsed sidebar uses the Deep Socials mark instead of a missing image, and the header shows the page title instead of a cut-off dashboard crumb.