Fixed code to use <screen> tags as base for the xml. Confirmed layout works now.

Provider/frontend/src/lib/DeviceManager.svelte

@@ -10,7 +10,7 @@
   let savingMac = $state('');
   let saveResult = $state('');
 
-  const DEFAULT_XML = `<lv_obj width="100%" height="100%" flex_flow="column" align="center" style_pad_row="10">\n    <lv_label text="Hello World" />\n    <lv_label bind_text="device_mac" />\n</lv_obj>`;
+  let defaultXml = $state('');
 
   // Debug states
   let debugRegistering = $state(false);
@@ -19,7 +19,9 @@
     loading = true;
     error = '';
     try {
-      devices = await getDevices();
+      const data = await getDevices();
+      devices = data.devices;
+      defaultXml = data.default_layout;
     } catch (e) {
       error = e.message || 'Failed to load devices';
     } finally {
@@ -107,7 +109,7 @@
             </div>
             <div class="flex items-center gap-2">
               {#if device.has_layout}
-                {#if device.xml_layout === DEFAULT_XML}
+                {#if device.xml_layout === defaultXml}
                   <span class="text-[10px] bg-accent/20 text-accent px-2 py-0.5 rounded-full uppercase tracking-wider font-semibold">
                     Default Layout
                   </span>
@@ -133,9 +135,9 @@
             <textarea
               id="xml-{device.mac}"
               class="w-full h-32 bg-bg-primary border border-border rounded-lg p-3 text-xs font-mono text-text-primary resize-y focus:border-accent focus:outline-none transition-colors placeholder:text-text-secondary/50"
-              placeholder={DEFAULT_XML}
+              placeholder={defaultXml}
               value={editingXml[device.mac] ?? device.xml_layout}
-              oninput={(e) => editingXml[device.mac] = e.target.value}
+              oninput={(e) => editingXml[device.mac] = e.currentTarget.value}
             ></textarea>
 
             <div class="flex items-center justify-between">

Provider/frontend/src/lib/api.js

@@ -278,8 +278,8 @@ export async function deleteTask(id) {
 // ─── Device Management ───────────────────────────────────────────────────────
 
 /**
- * Fetch all registered devices.
+ * Fetch all registered devices and the default layout.
- * @returns {Promise<Array<{mac: string, has_layout: boolean}>>}
+ * @returns {Promise<{default_layout: string, devices: Array<{mac: string, has_layout: boolean, xml_layout: string}>}>}
  */
 export async function getDevices() {
     const res = await trackedFetch(`${API_BASE}/api/devices`);

Provider/main/api/devices/list.cpp

@@ -11,7 +11,11 @@ internal esp_err_t api_devices_get_handler(httpd_req_t *req)
   httpd_resp_set_type(req, "application/json");
   httpd_resp_set_hdr(req, "Access-Control-Allow-Origin", "*");
 
+  cJSON *root = cJSON_CreateObject();
+  cJSON_AddStringToObject(root, "default_layout", kDefaultLayoutXml);
+  
   cJSON *arr = cJSON_CreateArray();
+  cJSON_AddItemToObject(root, "devices", arr);
 
   for (int i = 0; i < MAX_DEVICES; i++)
   {
@@ -25,11 +29,11 @@ internal esp_err_t api_devices_get_handler(httpd_req_t *req)
     }
   }
 
-  const char *json = cJSON_PrintUnformatted(arr);
+  const char *json = cJSON_PrintUnformatted(root);
   httpd_resp_sendstr(req, json);
 
   free((void *)json);
-  cJSON_Delete(arr);
+  cJSON_Delete(root);
 
   return ESP_OK;
 }

Provider/main/api/devices/screen_image.cpp

@@ -89,21 +89,32 @@ internal esp_err_t api_devices_screen_image_handler(httpd_req_t *req)
 
   bool render_success = false;
 
-  // 1. Wrap the payload in a <component><view> if it's missing (LVGL 9.4
+  // 1. Prepare the XML payload
-  // requirement for register_component_from_data)
+  const char *xml_to_register = NULL;
-  char xml_buffer[2500];
+  static char xml_buffer[DEVICE_XML_MAX + 100]; // static buffer to avoid stack overflow
-  const char *xml_to_register = (const char *)dev->xml_layout;
 
-  if (strstr(xml_to_register, "<view") == NULL &&
+  if (dev->xml_layout[0] == '\0')
-      strstr(xml_to_register, "<screen") == NULL)
   {
+    ESP_LOGI(kTagDeviceScreenImage, "Device %s has no layout xml.", mac);
+    return ESP_FAIL;
+  }
+
+  if (strstr(dev->xml_layout, "<screen") != NULL)
+  {
+    // The user provided a correct <screen> wrapped XML
+    xml_to_register = dev->xml_layout;
+    ESP_LOGI(kTagDeviceScreenImage,
+             "XML already contains <screen>, passing directly to parser.");
+  }
+  else
+  {
+    // Backwards compatibility for early setups - wrap it in screen and view
     snprintf(xml_buffer, sizeof(xml_buffer),
-             "<component>\n<view width=\"100%%\" "
+             "<screen>\n<view name=\"current_device\" width=\"100%%\" height=\"100%%\">\n%s\n</view>\n</screen>",
-             "height=\"100%%\">\n%s\n</view>\n</component>",
              dev->xml_layout);
     xml_to_register = xml_buffer;
     ESP_LOGI(kTagDeviceScreenImage,
-             "Wrapped widget XML in component/view for parsing.");
+             "Legacy XML without <screen> detected. Wrapped automatically.");
   }
 
   // 2. Register the XML payload as a component
@@ -115,18 +126,12 @@ internal esp_err_t api_devices_screen_image_handler(httpd_req_t *req)
     ESP_LOGI(kTagDeviceScreenImage, "Successfully registered XML for device %s",
              mac);
 
-    // 3. Determine if this XML describes a full <screen> or just a <component>
+    // 3. Since we enforce <screen> now, we always create a screen instance
-    // layout Simple heuristic: check if the string contains "<screen"
-    if (strstr(xml_to_register, "<screen") != NULL)
-    {
-      ESP_LOGI(kTagDeviceScreenImage,
-               "XML contains <screen>, creating screen instance");
     lv_obj_t *new_scr = lv_xml_create_screen("current_device");
 
     if (new_scr)
     {
-        // We must load this newly created screen to make it active before
+      // We must load this newly created screen to make it active before rendering
-        // rendering
       lv_screen_load(new_scr);
       scr = new_scr; // Update local pointer since active screen changed
       render_success = true;
@@ -138,23 +143,6 @@ internal esp_err_t api_devices_screen_image_handler(httpd_req_t *req)
     }
   }
   else
-    {
-      ESP_LOGI(kTagDeviceScreenImage,
-               "XML is a component/widget, creating on active screen");
-      // Create the component directly on the currently active cleaned screen
-      lv_obj_t *comp = (lv_obj_t *)lv_xml_create(scr, "current_device", NULL);
-      if (comp)
-      {
-        render_success = true;
-      }
-      else
-      {
-        ESP_LOGE(kTagDeviceScreenImage, "lv_xml_create failed for device %s",
-                 mac);
-      }
-    }
-  }
-  else
   {
     ESP_LOGE(kTagDeviceScreenImage,
              "lv_xml_register_component_from_data failed for device %s", mac);

Provider/main/device.hpp

@@ -8,10 +8,12 @@ constexpr int MAX_DEVICES = 8;
 constexpr int DEVICE_XML_MAX = 2048;
 
 constexpr char kDefaultLayoutXml[] = 
-    "<lv_obj width=\"800\" height=\"480\" flex_flow=\"column\" flex_main_place=\"center\" flex_cross_place=\"center\" style_pad_row=\"10\">\n"
+    "<screen>\n"
+    "  <view width=\"100%\" height=\"100%\" layout=\"flex\" flex_flow=\"column\" style_flex_main_place=\"center\" style_flex_cross_place=\"center\" style_pad_row=\"10\">\n"
     "    <lv_label text=\"Hello World\" />\n"
     "    <lv_label bind_text=\"device_mac\" />\n"
-    "</lv_obj>";
+    "  </view>\n"
+    "</screen>";
 
 struct device_t
 {