Entity preview popover — one surface, opened on hover/focus of an inline entity-ref chip, shared across every record type. Identity sits top-left: a round mark = person, a square mark = company (initials over a hue hashed from the name), or a solid --ic tile + white glyph for typed objects (amber calendar = meeting, blue check = task, lime note = note — one reserved hue per type, matching entity-ref & nav segments). The head (mark + 14px title + type subtitle, with an optional status pill) and the closing "Otevřít detail" stay constant; the middle adapts to the type — contacts show phone & e-mail, a meeting shows date/time, place and stacked attendees, a task shows due date, assignee & priority, a note shows a 3-line excerpt and what it is attached to. Portalled to body in-app; closes on scroll / resize / Esc.