chore(web): drop probe button and footer rail

The 15 s health poll stays; the manual trigger and the rtt/poll-note
footer earned nothing over it.

Closes #106

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

web/index.html

@@ -18,11 +18,10 @@
     fault red) with a soft glow, phosphor-cyan for the one interactive control.
     STORY: the operator opens the board, reads the master lamp, and knows in a
     second whether arr can do its job — and which upstream is down, by name.
-    FIRST VIEWPORT: a top rail (wordmark + master lamp + verdict + version +
-    PROBE control), then the chain: TMDB and PROWLARR modules on the left
-    feeding the central arr module, TRANSMISSION driven on the right, joined by
-    bus hairlines with direction arrows. Footer rail carries the round-trip
-    readout. On a phone the chain stacks vertically.
+    FIRST VIEWPORT: a top rail (wordmark + master lamp + verdict + version),
+    then the chain: TMDB and PROWLARR modules on the left feeding the central
+    arr module, TRANSMISSION driven on the right, joined by bus hairlines with
+    direction arrows. On a phone the chain stacks vertically.
     FORM: broadcast master-control panel, #2 of 7 on the ordered list; external
     roll (shell RANDOM → 2, witness 57910; concept-seed.mjs degraded to empty
     output in this environment).
@@ -93,7 +92,6 @@
       <p class="rail-verdict readout" id="master-verdict" role="status">probing chain…</p>
       <div class="rail-meta">
         <span class="readout dim" id="version" data-testid="version">v —</span>
-        <button type="button" class="control" id="probe">probe</button>
       </div>
     </header>
 
@@ -331,9 +329,5 @@
       </section>
     </main>
 
-    <footer class="rail rail-foot">
-      <span class="readout dim" id="roundtrip">rtt —</span>
-      <span class="readout dim" id="poll-note">repolls every 15 s</span>
-    </footer>
   </body>
 </html>

web/src/main.ts

@@ -98,8 +98,6 @@ function main() {
   const masterLamp = must<HTMLElement>("#master-lamp");
   const verdict = must<HTMLElement>("#master-verdict");
   const version = must<HTMLElement>("#version");
-  const roundtrip = must<HTMLElement>("#roundtrip");
-  const probeButton = must<HTMLButtonElement>("#probe");
 
   const master = moduleRefs("master");
   const checks = {
@@ -153,18 +151,16 @@ function main() {
       for (const name of ["tmdb", "prowlarr", "master"] as const) {
         setTrace(name, null);
       }
-      roundtrip.textContent = "rtt —";
       return;
     }
 
-    const { report, roundtripMs } = probe;
+    const { report } = probe;
     const degraded = report.status === "degraded";
 
     masterLamp.dataset.state = degraded ? "degraded" : "ok";
     verdict.dataset.tone = degraded ? "warn" : "ok";
     verdict.textContent = degraded ? "chain degraded" : "all signals nominal";
     version.textContent = `v${report.version}`;
-    roundtrip.textContent = `rtt ${roundtripMs} ms`;
 
     setModule(master, degraded ? "degraded" : "ok", degraded ? "warn" : "ok", report.status);
     setTrace("master", degraded ? "warn" : "ok");
@@ -192,16 +188,11 @@ function main() {
       return;
     }
     inFlight = true;
-    probeButton.disabled = true;
     render(await probeHealth());
-    probeButton.disabled = false;
     inFlight = false;
     refreshQueuesBadge?.();
   }
 
-  probeButton.addEventListener("click", () => {
-    void probe();
-  });
   window.setInterval(() => {
     void probe();
   }, POLL_MS);

web/src/style.css

@@ -134,14 +134,6 @@ body {
   box-shadow: inset 0 1px var(--highlight);
 }
 
-.rail-foot {
-  margin-top: auto;
-  border-bottom: 0;
-  border-top: 1px solid var(--line);
-  justify-content: space-between;
-  font-size: var(--text-xs);
-}
-
 .rail-id {
   display: flex;
   align-items: center;