webui: add relay state badges and feedback

firmware/esp32/overland-controller/overland-controller.ino

@@ -48,6 +48,35 @@ h1{font-size:21px;margin:0}.sub{color:var(--muted);font-size:13px;margin-top:4px
 .fill{height:100%;background:linear-gradient(90deg,var(--good),#9be15d);width:0%}
 button{width:100%;border:0;border-radius:12px;padding:12px;background:var(--btn);color:var(--text);font-weight:800;font-size:15px}
 button.on{background:#17462a;color:#dfffea}button.off{background:#46202a;color:#ffe2e8}
+
+.relayBadge{
+  padding:4px 8px;
+  border-radius:999px;
+  font-size:11px;
+  font-weight:700;
+  border:1px solid var(--line);
+}
+
+.relayBadge.on{
+  background:#173c22;
+  color:#dfffea;
+}
+
+.relayBadge.off{
+  background:#3f1820;
+  color:#ffe2e8;
+}
+
+.relayBadge.pending{
+  background:#4d3f12;
+  color:#fff0b3;
+}
+
+.relayFeedback{
+  font-size:11px;
+  color:var(--muted);
+  margin-top:4px;
+}
 input{width:100%;border:1px solid var(--line);border-radius:12px;padding:12px;background:#0f151d;color:var(--text);font-size:15px}
 .list{display:grid;gap:8px;margin-top:12px}
 .item{display:flex;justify-content:space-between;gap:8px;background:#0f151d;border:1px solid var(--line);border-radius:12px;padding:10px}
@@ -241,6 +270,19 @@ input{width:100%;border:1px solid var(--line);border-radius:12px;padding:12px;ba
 const API_BASE="/api/v1";
 function api(path){return API_BASE+path;}
 
+const relayPending={};
+const relayFeedback={};
+
+function relayStateLabel(r){
+  if(relayPending[r.id]!==undefined) return "SENDING";
+  return r.state ? "ON" : "OFF";
+}
+
+function relayStateClass(r){
+  if(relayPending[r.id]!==undefined) return "pending";
+  return r.state ? "on" : "off";
+}
+
 const STATUS_FIELDS_OVERVIEW="battery,temps,relays,vehicle,network,alarms,system";
 
 function isConfigTabActive(){
@@ -344,8 +386,42 @@ async function setBmsEnabled(enabled){
   await load();
 }
 async function relay(id,on){
-  await fetch(api("/relay/set"),{method:"POST",headers:{"Content-Type":"application/json"},body:JSON.stringify({id,state:on})});
-  await load();
+  relayPending[id]=on;
+  relayFeedback[id]=on ? "Turning on..." : "Turning off...";
+
+  if(window.lastStatus) render(window.lastStatus);
+
+  try{
+    const r=await fetch(api("/relay/set"),{
+      method:"POST",
+      headers:{"Content-Type":"application/json"},
+      body:JSON.stringify({id,state:on})
+    });
+
+    if(!r.ok){
+      throw new Error("HTTP "+r.status);
+    }
+
+    relayFeedback[id]=on ? "Relay ON" : "Relay OFF";
+
+    await load();
+
+  }catch(err){
+
+    console.error(err);
+    relayFeedback[id]="Command failed";
+
+    if(window.lastStatus) render(window.lastStatus);
+
+  }finally{
+
+    delete relayPending[id];
+
+    setTimeout(()=>{
+      delete relayFeedback[id];
+      if(window.lastStatus) render(window.lastStatus);
+    },1500);
+  }
 }
 function render(data){
   data=mergeStatus(window.lastStatus,data);
@@ -389,10 +465,26 @@ function render(data){
 
   $("relays").innerHTML=(data.relays||[]).map(r=>`
     <div class="item">
-      <span>${r.name||r.id}</span>
+      <div>
+        <div class="row" style="gap:8px">
+          <span>${r.name||r.id}</span>
+          <span class="relayBadge ${relayStateClass(r)}">${relayStateLabel(r)}</span>
+        </div>
+        <div class="relayFeedback">${relayFeedback[r.id]||""}</div>
+      </div>
+
       <span class="row" style="gap:6px">
-        <button class="on" onclick="relay('${r.id}',true)">ON</button>
-        <button class="off" onclick="relay('${r.id}',false)">OFF</button>
+        <button class="on"
+                ${relayPending[r.id]!==undefined?"disabled":""}
+                onclick="relay('${r.id}',true)">
+          ON
+        </button>
+
+        <button class="off"
+                ${relayPending[r.id]!==undefined?"disabled":""}
+                onclick="relay('${r.id}',false)">
+          OFF
+        </button>
       </span>
     </div>`).join("");