Fix render issues after moving floating input links (#841)

- Fixes floating inputs have invisible segment after moving
- Fixes floating input can be moved onto existing input link, resulting
in the slot having two links

src/canvas/FloatingRenderLink.ts

@@ -96,12 +96,12 @@ export class FloatingRenderLink implements RenderLink {
     this.fromPos = fromReroute.pos
   }
 
-  canConnectToInput(): true {
-    return true
+  canConnectToInput(): boolean {
+    return this.toType === "input"
   }
 
-  canConnectToOutput(): true {
-    return true
+  canConnectToOutput(): boolean {
+    return this.toType === "output"
   }
 
   canConnectToReroute(reroute: Reroute): boolean {
@@ -118,6 +118,8 @@ export class FloatingRenderLink implements RenderLink {
     floatingLink.target_id = node.id
     floatingLink.target_slot = node.inputs.indexOf(input)
 
+    node.disconnectInput(node.inputs.indexOf(input))
+
     this.fromSlot._floatingLinks?.delete(floatingLink)
     input._floatingLinks ??= new Set()
     input._floatingLinks.add(floatingLink)

src/canvas/LinkConnector.ts

@@ -622,6 +622,7 @@ export class LinkConnector {
 
     for (const link of outputLinks) delete link._dragging
     for (const link of inputLinks) delete link._dragging
+    for (const link of floatingLinks) delete link._dragging
     for (const reroute of hiddenReroutes) delete reroute._dragging
 
     renderLinks.length = 0