slosh 0.1.6

• graphics: no cell arithmetic at the far edge of an uncut image
• graphics: a retransmit invalidates every placement of the image
• Merge branch 'graphics-fixes' (PR #2 from iksteen): five fixes to the kitty passthrough, found through a mirror
• app: cut the modals, toasts and splash out of the images under them
• graphics: place what a float leaves of an image, not nothing
• graphics: state z=0 on a placement, so a mirror paints it over the text
• graphics: place an image once, not once per frame
• server: one synchronized message per frame, cells and images together
• screen: commit a wide cell's tail to prev, or the diff leaves a hole
• web: on one column the hero hovers, not a copy of the logo
• web: the floating logo, on one-column screens too
• web/recordings: a move cursor while the pointer drags
• pane: drop the render snapshot of panes on hidden tabs -- 154K -> 66K each
• web: card
• README.md: chore fix
• README.md: chore
• README.md: chore
• README.md: remove pointless brag
• docs: a way back to slosh.foo from every page; README links the site
• web: arch install as three copyable steps
• arch: point at ghostty-terminfo, the pacman spelling of the entry
• webdemo: generate terminfo.h -- pty.c includes it now