Add a hover preview popover for session tabs in the titlebar showing the
project name, full session title, workspace path, git branch, and (when
more than one server is connected) the server name.
- New TabPreviewPopover built on Kobalte HoverCard with v2 tokens
(--v2-elevation-floating, --v2-background-bg-base) and its own
data-component/data-slot CSS, matching the tooltip-v2 pattern.
- 200ms open delay, instant close, fade+scale entrance per the design.
- Add folder/branch icons to the v2 icon registry (16x16, 1px stroke)
and render them via the shared Icon sprite instead of inline SVG.
- Wire data from existing stores in TabNavItem; popover is suppressed
while editing, dragging, or pressing a tab.
usrnk1
0e483e6181