fix(autocomplete): reactively refresh lora syntax format cache on settings change (#917)

The autocomplete module cached the lora_syntax_format value at module load
but never updated it when the setting changed, causing autocomplete to
always insert legacy A1111 format even when 'full path' was configured.

- Expose refreshLoraSyntaxFormat() to re-fetch the setting from the API
- Listen for cross-tab 'storage' events to react to settings saved in
  the standalone web UI
- Listen for 'visibilitychange' to refresh when the user switches back
  to the ComfyUI tab
- Wire SettingsManager.saveSetting() to set a localStorage key when
  lora_syntax_format changes, triggering the storage event

static/js/managers/SettingsManager.js

@@ -295,6 +295,13 @@ export class SettingsManager {
         // Update state
         state.global.settings[settingKey] = value;
 
+        if (settingKey === 'lora_syntax_format') {
+            try {
+                localStorage.setItem('lm:lora-syntax-format-changed', Date.now().toString());
+            } catch (_) {
+            }
+        }
+
         if (!this.isBackendSetting(settingKey)) {
             return;
         }