Recycle a pod link that goes mute, not only one born mute

A link can wedge *after* working. On the tablet, 2026-08-27: the − pod
connected at 15:46:29, carried sixty presses, and at 15:47:19 stopped
sending button frames altogether while still streaming battery every five
seconds. The link was up, the pod was answering, and not one press
arrived for the rest of the ride.

The §7.1 detector could not see it. Its test was
`buttons_this_link == 0` — a link that had ever carried a button was
exempt, on the reasoning that a healthy pod proves itself once and should
never be disturbed again. Exempt for life turned out to mean dead for the
ride.

So the clock runs from the last press rather than from the connect, and
falls back to the connect for a link that never carried one. The cost of
being wrong is unchanged and still real — a rider who genuinely has not
shifted for NO_INPUT_AFTER loses shifting for the few seconds a reconnect
takes — which is why the window stays longer than any climb's worth of
steady pedalling.

Automatic recovery is deliberately slow, because the supervisor cannot
tell a wedged pod from a rider who is not shifting. The rider can, so the
shifter tile's action while connected is now Reconnect: drop the link and
take it again, immediately, instead of waiting out the window.

Not the both-pods failure, which was the first suspicion and would have
been the better story — connecting both is what stops the − pod reporting
its own paddle. The log rules it out: one `pod connected`, for the − pod,
and no redundant link ever closed. Every `plus` in it is the − pod
relaying its twin's paddle over the mesh, which is the pair working as
designed.

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

src-tauri/tauri.conf.json

@@ -1,7 +1,7 @@
 {
   "$schema": "https://schema.tauri.app/config/2",
   "productName": "BikeControl",
-  "version": "0.2.3",
+  "version": "0.2.4",
   "identifier": "paris.tourolle.bikecontrol",
   "build": {
     "frontendDist": "../ui/dist",
@@ -43,7 +43,7 @@
     ],
     "category": "Utility",
     "android": {
-      "versionCode": 1203
+      "versionCode": 1204
     },
     "shortDescription": "Indoor cycling trainer control",
     "longDescription": "Control a smart trainer over BLE, ride gradient profiles and synthetic waveforms, and record the result."