Use manifest defaults when adding components and refresh properties from device

- Populate prop elements with manifest default values when adding
  components in both offline and live mode
- Send config values from manifest in SOX add command for live devices
- Refresh button in properties panel now fetches fresh values from
  the connected device before re-reading the DOM
- Properties panel fetches device values on open in live mode

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

properties.py

@@ -518,6 +518,8 @@ class PropertiesPanel:
         # sibling nothing at all.
         self._build_header(comp_type)
         self._build_footer()
+        if app_state.live_mode and app_state.device_session is not None:
+            self._refresh_from_device()
         self._loading = True
         self._build_rows_area()
         self._loading = False
@@ -1056,7 +1058,13 @@ class PropertiesPanel:
     # -- the two buttons --
 
     def refresh(self):
-        """Re-reads every value from the DOM, discarding edits that were not saved."""
+        """Re-reads every value from the DOM, discarding edits that were not saved.
+
+        In live mode, fetches fresh values from the device first.
+        """
+        if app_state.live_mode and app_state.device_session is not None:
+            self._refresh_from_device()
+
         self._loading = True
         for row in self.rows:
             self._load_row(row)
@@ -1066,7 +1074,30 @@ class PropertiesPanel:
             self._load_meta_row()
         self._load_path()
         self._update_tint()
-        self.status_var.set("Refreshed from the document.")
+        if app_state.live_mode:
+            self.status_var.set("Refreshed from device.")
+        else:
+            self.status_var.set("Refreshed from the document.")
+
+    def _refresh_from_device(self):
+        """Reads fresh config+runtime values from the device into the DOM element."""
+        from sox import CONFIG, RUNTIME
+        ds = app_state.device_session
+        comp_id = self.comp.get("id")
+        if comp_id is None:
+            return
+        try:
+            comp_id = int(comp_id)
+        except ValueError:
+            return
+        sox_comp = ds.sox_client.cache_get(comp_id)
+        if sox_comp is None:
+            return
+        try:
+            ds.sox_client.update([sox_comp], CONFIG | RUNTIME)
+        except Exception:
+            pass
+        ds.update_element_from_cache(comp_id, app_state.xml_root_element)
 
     def save(self):
         """Writes the edited rows back, as one undoable step.
@@ -1137,9 +1168,9 @@ class PropertiesPanel:
         for element, prop_name, _before, after in changes:
             if prop_name != "meta":
                 set_prop_value(element, prop_name, after)
-                if live_hooks.is_live():
-                    if not live_hooks.live_set_prop_value(element, prop_name, after):
-                        live_failures.append(prop_name)
+            if live_hooks.is_live():
+                if not live_hooks.live_set_prop_value(element, prop_name, after):
+                    live_failures.append(prop_name)
 
         if not app_state.live_mode:
             undo.push(undo.SlotValueCommand(list(changes)))
@@ -1174,7 +1205,16 @@ class PropertiesPanel:
         root = app_state.xml_root_element
         if root is None:
             return False
-        return any(element is self.comp for element in root.iter())
+        if any(element is self.comp for element in root.iter()):
+            return True
+        if app_state.live_mode:
+            comp_id = self.comp.get("id")
+            if comp_id is not None:
+                for element in root.iter():
+                    if element.get("id") == comp_id:
+                        self.comp = element
+                        return True
+        return False
 
     def _sync_bar(self, bar, first, last):
         """Moves a scrollbar's thumb, and hides the bar entirely when it spans the whole."""