test: add blocked closure continuity case

scripts/test_approved_plan_continuity_gate.mjs

@@ -215,6 +215,47 @@ stdout=${result.stdout}`);
       }
     },
   },
+
+  {
+    name: 'continuity: passes when task is complete, next action is known, no dispatch receipt exists, and closure is blocked',
+    run() {
+      const fixture = createFixture({
+        'input.json': {
+          planId: 'plan-blocked-closure',
+          currentTask: 'task-9',
+          taskState: 'complete',
+          nextDerivedAction: {
+            type: 'message_subagent',
+            task: 'continue with task-10',
+          },
+          replyClosureState: 'blocked',
+          dispatchReceipt: null,
+        },
+      });
+
+      try {
+        const result = runGate({
+          args: ['--compact', '--input', fixture.path('input.json')],
+        });
+
+        if (result.status !== 0 && result.status !== null) {
+          throw new Error(`expected controlled execution, got status=${result.status}
+${result.stderr || result.stdout}`);
+        }
+
+        if (!result.json || typeof result.json !== 'object') {
+          throw new Error(`expected JSON output
+stdout=${result.stdout}`);
+        }
+
+        if (result.json.ok !== true) {
+          throw new Error(`expected continuity pass ok=true when closure is blocked, got ${JSON.stringify(result.json)}`);
+        }
+      } finally {
+        fixture.cleanup();
+      }
+    },
+  },
 ];
 
 const results = [];