Refuse to join the pair, rather than undoing it a second later

Connecting both pods is the configuration in which the `−` pod stops
reporting its own paddle (§2.3.1). `Cmd::Seen` has always known that and
declined; an explicit `Cmd::Connect` walked straight past it, and
housekeeping then closed the redundant link a second or so later — which
looks like the app handling the case and is not the same thing. On the
tablet, 2026-08-27 15:55:39, the pair was joined for 1.4 s and the `−`
pod did not report another press for the rest of the session, across two
fresh links and an app reinstall.

So the rule now lives on both paths. `auto` is still armed by the refused
request, so the fallback stands: the moment the `−` pod goes away, the
`+` pod is taken on its next advertisement.

And the UI stops offering the trap. The `+` pod's "Connect anyway" sat
next to a working controller, which put the one action that breaks
shifting a single tap from a rider hunting for a way to fix shifting. It
now reads "Held in reserve", which is what that pod is.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

ui/src/components/ClickPanel.svelte

@@ -158,10 +158,15 @@
             <button class="btn ghost" onclick={() => disconnect(pod.pod)}>Disconnect</button>
           {:else if pod.state === 'searching'}
             <button class="btn ghost" onclick={() => disconnect(pod.pod)}>Stop</button>
+          {:else if dormant}
+            <!-- No "connect anyway". Joining the pair is the one action that
+                 stops the − pod reporting its own paddle (§2.3.1), and offering
+                 it beside a working controller put the failure one tap from a
+                 rider hunting for a fix. Rust refuses it too. The fallback is
+                 not lost: the moment the − pod goes, this pod is taken. -->
+            <span class="held">Held in reserve</span>
           {:else}
-            <button class="btn ghost" onclick={() => connect(pod.pod)}>
-              {dormant ? 'Connect anyway' : 'Find it'}
-            </button>
+            <button class="btn ghost" onclick={() => connect(pod.pod)}>Find it</button>
           {/if}
         </div>
 
@@ -353,6 +358,12 @@
     font-size: 0.82rem;
   }
 
+  .held {
+    align-self: center;
+    font-size: 0.8rem;
+    color: var(--ink-faint);
+  }
+
   .note {
     flex: 1 1 100%;
     margin: 0;