webui: preserve config edits during polling

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

@@ -401,6 +401,24 @@ function statusUrl(){
   return needsFullStatus ? api("/status") : api("/status?fields="+STATUS_FIELDS_OVERVIEW);
 }
 
+
+const configTouched={};
+
+function markConfigFieldTouched(id){
+  configTouched[id]=true;
+}
+
+function setConfigValue(id,value){
+  const el=$(id);
+  if(!el) return;
+  if(configTouched[id] || document.activeElement===el) return;
+  el.value=value ?? "";
+}
+
+function clearConfigTouched(ids){
+  ids.forEach(id=>{delete configTouched[id];});
+}
+
 function mergeStatus(previous,next){
   if(!previous) return next;
   return Object.assign({},previous,next);
@@ -426,9 +444,7 @@ function renderApConfig(data){
   const n=data.network||{};
   if($("apCurrentSsid")) $("apCurrentSsid").textContent=n.ap_ssid||"--";
   if($("apSecurity")) $("apSecurity").textContent=n.ap_auth||"--";
-  if($("apSsidInput") && !$("apSsidInput").dataset.touched){
+  setConfigValue("apSsidInput",n.ap_ssid||"");
-    $("apSsidInput").value=n.ap_ssid||"";
-  }
 }
 
 async function saveApConfig(){
@@ -466,6 +482,7 @@ async function saveApConfig(){
 
   $("apPasswordInput").value="";
   alert("AP settings saved. Reconnect to the new WiFi network if this page stops updating.");
+  clearConfigTouched(["apSsidInput","apPasswordInput"]);
 }
 
 function renderWeatherBadge(data){
@@ -699,6 +716,7 @@ async function saveDeviceConfig(){
   await fetch(api("/config/save"),{method:"POST"});
   await load();
   alert("Device name saved");
+  clearConfigTouched(["deviceNameInput"]);
 }
 
 async function saveBmsFullConfig(){
@@ -725,6 +743,7 @@ async function saveBmsFullConfig(){
   await fetch(api("/config/save"),{method:"POST"});
   await load();
   alert("BMS config saved");
+  clearConfigTouched(["bmsNameInput","bmsAddressInput","bmsAddressTypeInput"]);
 }
 
 async function scanTemps(){
@@ -896,6 +915,7 @@ async function saveTempConfig(){
   await fetch(api("/config/save"),{method:"POST"});
   await load();
   alert("Temperature config saved");
+  clearConfigTouched(["tempEnabledCount"]);
 }
 
 async function loadWifiConfig(){
@@ -921,6 +941,7 @@ async function saveWifi(){
   await fetch(api("/config/wifi"),{method:"POST",headers:{"Content-Type":"application/json"},body:JSON.stringify({networks})});
   await loadWifiConfig();
   await load();
+  clearConfigTouched(["w1s","w1p","w1r","w2s","w2p","w2r","w3s","w3p","w3r"]);
 }
 async function connectWifi(){
   await fetch(api("/wifi/connect"),{method:"POST"});
@@ -937,6 +958,18 @@ async function load(){
 }
 load();
 loadWifiConfig();
+document.addEventListener("input",e=>{
+  if(e.target && e.target.id && (
+    e.target.closest("#configPage") ||
+    e.target.id.startsWith("w") ||
+    e.target.id.startsWith("ap") ||
+    e.target.id.startsWith("bms") ||
+    e.target.id.startsWith("device") ||
+    e.target.id.startsWith("temp")
+  )){
+    markConfigFieldTouched(e.target.id);
+  }
+});
 setInterval(load,3000);
 </script>
 </body>

tests/test_http_api_contract.py

@@ -460,3 +460,17 @@ def test_temp_config_lookup_is_available_to_http_handlers():
     helper_pos = source.index("int findTempConfigIndexById(")
     first_uart_guard_pos = source.index("#if DASHBOARD_UART_ENABLED")
     assert helper_pos < first_uart_guard_pos
+
+
+def test_embedded_webui_preserves_config_input_while_polling():
+    source = firmware_source()
+
+    assert "const configTouched={};" in source
+    assert "function markConfigFieldTouched(id)" in source
+    assert "function setConfigValue(id,value)" in source
+    assert "document.activeElement===el" in source
+    assert 'document.addEventListener("input"' in source
+    assert 'setConfigValue("apSsidInput"' in source
+    assert 'setConfigValue("deviceNameInput"' in source
+    assert 'setConfigValue("bmsNameInput"' in source
+    assert 'setConfigValue("tempEnabledCount"' in source