perf: lazy-load pull request workspace (Closes #541)

tests/test_feature_loader.py

@@ -68,4 +68,24 @@ console.log(JSON.stringify({loading,failedState,first,second,opened,finalStatus:
         "second": True,
         "opened": 1,
         "finalStatus": "",
-    }
+    }
+
+
+def test_pull_workspace_failure_is_accessible_and_retryable_from_same_card():
+    result = run_loader("""
+const trigger={disabled:false}; const status={textContent:''}; let opened=0;
+const loader=createFeatureLoader({document, urls:{'pull-workflow':'feature-pull.js'}, timeoutMs:100});
+const failed=loader.run('pull-workflow',{trigger,status,retryLabel:'Tap the work card to retry.'},()=>{opened++;});
+state.node.onerror(); const first=await failed;
+const failedStatus=status.textContent;
+const retry=loader.run('pull-workflow',{trigger,status,retryLabel:'Tap the work card to retry.'},()=>{opened++;});
+state.node.onload(); const second=await retry;
+console.log(JSON.stringify({first,second,failedStatus,opened,appends:state.appends}));
+""")
+    assert result == {
+        "first": False,
+        "second": True,
+        "failedStatus": "Pull workspace could not load. Tap the work card to retry.",
+        "opened": 1,
+        "appends": 2,
+    }