feat: redesign linear elements 🎉 (#5501)

* feat: redesign arrows and lines

* set selectedLinearElement on pointerup

* fix tests

* fix lint

* set selectionLinearElement to null when element is not selected

* fix

* don't set selectedElementIds to empty object when linear element selected

* don't move arrows when clicked on bounding box

* don't consider bounding box when linear element selected

* better hitbox

* show pointer when over the points in linear elements

* highlight points when hovered

* tweak design whene editing linear element points

* tweak

* fix test

* fix multi point editing

* cleanup

* fix

* fix

* remove stroke when hovered

* account for zoom when hover

* review fix

* set selectedLinearElement to null when selectedElementIds doesn't contain the linear element

* remove hover affect when moved away from linear element

* don't set selectedLinearAElement if already set

* fix selection

* render reduced in test :p

* fix box selection for single linear element

* set selectedLinearElement when deselecting selected elements and linear element is selected

* don't show linear element handles when element locked

* selected linear element when only linear present and selected with selectAll

* don't set selectedLinearElement if already set

* store selectedLinearElement in browser to persist

* remove redundant checks

* test fix

* select linear element handles when user has finished multipoint editing

* fix snap

* add comments

* show bounding box for locked linear elements

* add stroke param to fillCircle and remove stroke when linear element point hovered

* set selectedLinearElement when thats the only element left when deselcting others

* skip tests instead of removing for rotation

* (un)bind on pointerUp when moving linear element points outside editor

* render bounding box for linear elements as a fallback on state mismatch

* simplify and remove type assertion

Co-authored-by: dwelle <luzar.david@gmail.com>

src/types.ts

@@ -179,6 +179,7 @@ export type AppState = {
   /** imageElement waiting to be placed on canvas */
   pendingImageElementId: ExcalidrawImageElement["id"] | null;
   showHyperlinkPopup: false | "info" | "editor";
+  selectedLinearElement: LinearElementEditor | null;
 };
 
 export type NormalizedZoomValue = number & { _brand: "normalizedZoom" };