Configurar Top-Rack como ajuste global

config.html

@@ -233,7 +233,6 @@
     .field-role { grid-column: span 3; }
     .field-model { grid-column: span 2; }
     .field-location { grid-column: span 2; }
-    .field-rack-temp { grid-column: span 4; }
     .field-host { grid-column: span 3; }
     .field-port { grid-column: span 1; }
     .field-username { grid-column: span 2; }
@@ -446,7 +445,7 @@
 
     @media (max-width: 1180px) {
       .device { grid-template-columns: repeat(6, minmax(0, 1fr)); align-items: start; }
-      .field-name, .field-role, .field-host, .password-credential, .field-rack-temp { grid-column: span 3; }
+      .field-name, .field-role, .field-host, .password-credential { grid-column: span 3; }
       .field-id, .field-model, .field-location, .field-username, .field-auth, .field-active, .field-delete { grid-column: span 2; }
       .field-port { grid-column: span 1; }
       .credential-note { grid-column: span 4; }
@@ -461,7 +460,7 @@
       .top-grid, .device { grid-template-columns: 1fr; }
       .field-active, .field-name, .field-id, .field-role, .field-model, .field-location,
       .field-host, .field-port, .field-username, .field-auth, .password-credential,
-      .credential-note, .field-rack-temp, .field-delete { grid-column: span 1; }
+      .credential-note, .field-delete { grid-column: span 1; }
       .threshold-row { grid-template-columns: 1fr; }
     }
   </style>
@@ -503,6 +502,17 @@
           <input id="sshTimeoutSeconds" type="number" min="2" step="1">
         </label>
       </div>
+      <div class="ssh-key-panel">
+        <h2>Temperatura Top-Rack</h2>
+        <div class="ssh-key-fields">
+          <label title="RPi desde el que el monitor leera el archivo JSON de temperatura. Se muestra nombre e IP para identificarlo rapido.">RPi origen
+            <select id="rackTemperatureSourceDeviceId"></select>
+          </label>
+          <label title="Path del archivo JSON en el RPi origen. Node-RED debe escribir ahi la ultima temperatura.">Path JSON temperatura
+            <input id="rackTemperatureFile" placeholder="/home/yamaray/monitor-rpi/rack-temp.json">
+          </label>
+        </div>
+      </div>
       <div class="ssh-key-panel">
         <h2>Clave SSH del monitor</h2>
         <div class="ssh-key-fields">
@@ -703,9 +713,6 @@
           <div class="credential-note">
             Metodo activo: <strong>${authMethod === "key" ? "Clave asimetrica: copiar clave publica del monitor en la RPi" : "Password"}</strong>
           </div>
-          <label class="field-rack-temp" title="Archivo opcional en este RPi con la temperatura del rack escrita por Node-RED. Si esta vacio, no se recoge temperatura Top-Rack desde este dispositivo.">Archivo temp rack
-            <input data-field="rackTemperatureFile" value="${device.rackTemperatureFile || ""}" placeholder="/home/yamaray/monitor-rpi/rack-temp.json">
-          </label>
           <label class="field-active" title="Si esta activo, este dispositivo se consulta por SSH. Si esta inactivo, se muestra deshabilitado y no se escanea.">Activo
             <input data-field="active" type="checkbox" ${device.active ? "checked" : ""}>
           </label>
@@ -720,6 +727,16 @@
       document.querySelector("#refreshIntervalSeconds").value = state.config.refreshIntervalSeconds || 30;
       document.querySelector("#idleScanIntervalSeconds").value = state.config.idleScanIntervalSeconds || 300;
       document.querySelector("#sshTimeoutSeconds").value = state.config.sshTimeoutSeconds || 8;
+      const rackSource = document.querySelector("#rackTemperatureSourceDeviceId");
+      rackSource.innerHTML = [
+        `<option value="">Sin sensor Top-Rack</option>`,
+        ...state.config.devices.map((device) => {
+          const value = device.id || device.host || device.name || "";
+          const label = `${device.name || value} · ${device.host || "sin IP"}`;
+          return `<option value="${value}" ${state.config.rackTemperatureSourceDeviceId === value ? "selected" : ""}>${label}</option>`;
+        })
+      ].join("");
+      document.querySelector("#rackTemperatureFile").value = state.config.rackTemperatureFile || "";
       document.querySelector("#sshPrivateKeyPath").value = state.config.sshPrivateKeyPath || "/ssh/monitor_rpi_ed25519";
       document.querySelector("#sshPublicKeyPath").value = state.config.sshPublicKeyPath || `${document.querySelector("#sshPrivateKeyPath").value}.pub`;
       document.querySelector("#warningTemp").value = state.config.temperatureThresholdsC?.warning || 60;
@@ -745,6 +762,8 @@
       state.config.refreshIntervalSeconds = Number(document.querySelector("#refreshIntervalSeconds").value || 30);
       state.config.idleScanIntervalSeconds = Number(document.querySelector("#idleScanIntervalSeconds").value || 300);
       state.config.sshTimeoutSeconds = Number(document.querySelector("#sshTimeoutSeconds").value || 8);
+      state.config.rackTemperatureSourceDeviceId = document.querySelector("#rackTemperatureSourceDeviceId").value || "";
+      state.config.rackTemperatureFile = document.querySelector("#rackTemperatureFile").value || "";
       state.config.sshPrivateKeyPath = document.querySelector("#sshPrivateKeyPath").value || "/ssh/monitor_rpi_ed25519";
       state.config.sshPublicKeyPath = document.querySelector("#sshPublicKeyPath").value || `${state.config.sshPrivateKeyPath}.pub`;
       state.config.temperatureThresholdsC = {
@@ -852,7 +871,6 @@
         password: "",
         privateKeyPath: "",
         authMethod: "password",
-        rackTemperatureFile: "",
         model: "RPi 4",
         role: "",
         location: "Rack",