org/text-input.org: remove (declare (ignore w)) from textarea render;
add truncation to text-input render (subseq display 0 w)
org/mouse.org: hit-test now uses component-layout-node and recurses
into children for deepest-match hit testing
org/select.org: render reads layout-node-x/y instead of hardcoded (0,0)
org/scrollbox-tabbar.org: tabbar render reads layout-node-x/y
instead of hardcoded (0,0); x-pos starts at x offset
All 4 org files tangled clean. 392 tests pass.
- mouse-mixin class with on-mouse-down/up/move/scroll handler slots
- handle-mouse-event dispatches to the right handler by event type
- hit-test finds deepest component at (x,y) coordinates
- selection struct + get-selection + copy-to-clipboard
- SGR mouse parsing already existed in input system (mouse-event struct,
parse-sgr-mouse function, CSI dispatch in %read-escape-sequence)
- 3 tests, 100% passing
