more fixes and tweaks

test/web.test.ts

@@ -435,8 +435,10 @@ describe('the page explains itself', () => {
       assert.match(label, /Train 4/, `the ruling does not name the train: ${label}`);
       assert.doesNotMatch(label, /tray\d/, `internal id on a button: ${label}`);
     }
-    assert.match(allow, /collision/, 'granting clearance does not mention the risk');
-    assert.match(hold, /safe|loses/, 'holding does not mention the cost');
+    // Deliberately NOT asserting that granting clearance mentions a collision: no rear-end is
+    // implemented, and promising one would describe a consequence the engine never delivers.
+    assert.match(allow, /same Mainline card/, 'granting clearance does not say what happens');
+    assert.match(hold, /losing the Stage/, 'holding does not mention the cost');
   });
 
   it('states the objective and whether you are keeping up', () => {