fix(common): manually roll equals/hashCode for CommentNode

Excludes the parent field for comparison since it can trigger cycles in some situations

Fixes COMPOSE-LOBSTERS-5G

common/src/main/kotlin/dev/msfjarvis/claw/common/comments/CommentNode.kt

@@ -9,9 +9,9 @@ package dev.msfjarvis.claw.common.comments
 import dev.msfjarvis.claw.database.local.PostComments
 import dev.msfjarvis.claw.model.Comment
 
-internal data class CommentNode(
+internal class CommentNode(
   val comment: Comment,
-  var parent: CommentNode? = null,
+  private var parent: CommentNode? = null,
   val children: MutableList<CommentNode> = mutableListOf(),
   val isUnread: Boolean = false,
   val indentLevel: Int,
@@ -34,6 +34,33 @@ internal data class CommentNode(
         )
     }
   }
+
+  /**
+   * [CommentNode.equals] and [CommentNode.hashCode] are hand-rolled to drop the
+   * [CommentNode.parent] field from the comparison since it's possible for there to be cycles in
+   * this comparison check. For our purposes we're fine with foregoing the field.
+   */
+  override fun equals(other: Any?): Boolean {
+    if (this === other) return true
+    if (javaClass != other?.javaClass) return false
+
+    other as CommentNode
+
+    if (comment != other.comment) return false
+    if (children != other.children) return false
+    if (isUnread != other.isUnread) return false
+    if (indentLevel != other.indentLevel) return false
+
+    return true
+  }
+
+  override fun hashCode(): Int {
+    var result = comment.hashCode()
+    result = 31 * result + children.hashCode()
+    result = 31 * result + isUnread.hashCode()
+    result = 31 * result + indentLevel
+    return result
+  }
 }
 
 internal fun createListNode(