Remove static circular dependency workaround (#734)

Workaround originally implemented when converting to ES modules, but is
now redundant.

`DEFAULT_EVENT_LINK_COLOR` confirmed unused in code search (litegraph
events).

src/LGraphCanvas.ts

@@ -216,8 +216,15 @@ export class LGraphCanvas implements ConnectionColorContext {
 
   static DEFAULT_BACKGROUND_IMAGE = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAGQAAABkCAIAAAD/gAIDAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAQBJREFUeNrs1rEKwjAUhlETUkj3vP9rdmr1Ysammk2w5wdxuLgcMHyptfawuZX4pJSWZTnfnu/lnIe/jNNxHHGNn//HNbbv+4dr6V+11uF527arU7+u63qfa/bnmh8sWLBgwYJlqRf8MEptXPBXJXa37BSl3ixYsGDBMliwFLyCV/DeLIMFCxYsWLBMwSt4Be/NggXLYMGCBUvBK3iNruC9WbBgwYJlsGApeAWv4L1ZBgsWLFiwYJmCV/AK3psFC5bBggULloJX8BpdwXuzYMGCBctgwVLwCl7Be7MMFixYsGDBsu8FH1FaSmExVfAxBa/gvVmwYMGCZbBg/W4vAQYA5tRF9QYlv/QAAAAASUVORK5CYII="
 
-  /** Initialised from LiteGraphGlobal static block to avoid circular dependency. */
-  static link_type_colors: Record<string, string>
+  static DEFAULT_EVENT_LINK_COLOR = "#A86"
+
+  /** Link type to colour dictionary. */
+  static link_type_colors: Dictionary<string> = {
+    "-1": LGraphCanvas.DEFAULT_EVENT_LINK_COLOR,
+    "number": "#AAA",
+    "node": "#DCA",
+  }
+
   static gradients: Record<string, CanvasGradient> = {}
 
   static search_limit = -1

src/LiteGraphGlobal.ts

@@ -66,8 +66,6 @@ export class LiteGraphGlobal {
   WIDGET_SECONDARY_TEXT_COLOR = "#999"
 
   LINK_COLOR = "#9A9"
-  // TODO: This is a workaround until LGraphCanvas.link_type_colors is no longer static.
-  static DEFAULT_EVENT_LINK_COLOR = "#A86"
   EVENT_LINK_COLOR = "#A86"
   CONNECTING_LINK_COLOR = "#AFA"
 
@@ -275,15 +273,6 @@ export class LiteGraphGlobal {
   onNodeTypeRegistered?(type: string, base_class: typeof LGraphNode): void
   onNodeTypeReplaced?(type: string, base_class: typeof LGraphNode, prev: unknown): void
 
-  // Avoid circular dependency from original single-module
-  static {
-    LGraphCanvas.link_type_colors = {
-      "-1": LiteGraphGlobal.DEFAULT_EVENT_LINK_COLOR,
-      "number": "#AAA",
-      "node": "#DCA",
-    }
-  }
-
   /**
    * Register a node class so it can be listed when the user wants to create a new one
    * @param type name of the node and path

test/litegraph.test.ts

@@ -27,19 +27,6 @@ describe("Import order dependency", () => {
     vi.resetModules()
   })
 
-  // Test can be safely removed if import order requirements are resolved.
-  test("Throws when entry point is not imported first", async ({ expect }) => {
-    async function importSubmoduleFirst() {
-      const directImport = await import("@/LGraph")
-      const entryPointImport = await import("@/litegraph")
-
-      // Unreachable.
-      if (directImport !== entryPointImport) return
-    }
-
-    await expect(importSubmoduleFirst).rejects.toThrow("Cannot set properties of undefined (setting 'link_type_colors')")
-  })
-
   test("Imports without error when entry point is imported first", async ({ expect }) => {
     async function importNormally() {
       const entryPointImport = await import("@/litegraph")