diff --git a/web/src/api/client.ts b/web/src/api/client.ts
index 554cdbc..0707ac1 100644
--- a/web/src/api/client.ts
+++ b/web/src/api/client.ts
@@ -29,7 +29,7 @@ import type {
  */
 export class ApiError extends Error {
   constructor(
-    public status: number,
+    public readonly status: number,
     message: string
   ) {
     super(message);
diff --git a/web/src/lib/decision-graph.test.ts b/web/src/lib/decision-graph.test.ts
index a109a12..17c785e 100644
--- a/web/src/lib/decision-graph.test.ts
+++ b/web/src/lib/decision-graph.test.ts
@@ -5,7 +5,7 @@
 
 import { describe, it, expect } from 'vitest';
 import { decisionsToElements, filterNowMode, decisionStylesheet } from './decision-graph';
-import type { GraphNode, GraphEdge } from '../types';
+import type { GraphNode, GraphEdge, NodeType, NodeStatus, EdgeType } from '../types';
 
 /**
  * Create a test GraphNode.
@@ -19,10 +19,10 @@ function createNode(
   return {
     id,
     project_id: 'proj-1',
-    node_type: nodeType as any,
+    node_type: nodeType as NodeType,
     title,
     description: 'Test description',
-    status: status as any,
+    status: status as NodeStatus,
     priority: 'medium',
     assigned_to: null,
     created_by: null,
@@ -47,7 +47,7 @@ function createEdge(
 ): GraphEdge {
   return {
     id,
-    edge_type: edgeType as any,
+    edge_type: edgeType as EdgeType,
     from_node: fromNode,
     to_node: toNode,
     label,