fix: correct assignee trigger test to handle different assignee properly (#178)

* fix: use direct assignee field

* fix: correct assignee trigger test to handle different assignee properly

The test was failing because the mockIssueAssignedContext was missing the
top-level assignee field that the trigger validation logic checks. Added
the missing assignee field to the mock context and updated the test to
properly override both the top-level assignee and issue.assignee fields
when testing assignment to a different user.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

* Adjust IssuesAssignedEvent import position (#2)

---------

Co-authored-by: Claude <noreply@anthropic.com>

test/mockContext.ts

@@ -91,6 +91,12 @@ export const mockIssueAssignedContext: ParsedGitHubContext = {
   actor: "admin-user",
   payload: {
     action: "assigned",
+    assignee: {
+      login: "claude-bot",
+      id: 11111,
+      avatar_url: "https://avatars.githubusercontent.com/u/11111",
+      html_url: "https://github.com/claude-bot",
+    },
     issue: {
       number: 123,
       title: "Feature: Add dark mode support",

test/trigger-validation.test.ts

@@ -87,6 +87,11 @@ describe("checkContainsTrigger", () => {
         ...mockIssueAssignedContext,
         payload: {
           ...mockIssueAssignedContext.payload,
+          assignee: {
+            ...(mockIssueAssignedContext.payload as IssuesAssignedEvent)
+              .assignee,
+            login: "otherUser",
+          },
           issue: {
             ...(mockIssueAssignedContext.payload as IssuesAssignedEvent).issue,
             assignee: {