feat(FN-3970): consolidate Even plugin APIs into unified package with webho

Collapsed the Even plugin architecture into a single unified plugin by merging board card routes and replacing the transport stub with a real webhook implementation, removing the separate cards plugin from the workspace. The new unified plugin (`fusion-plugin-even-realities-glasses`) now exports con

Fusion-Task-Id: FN-3970

plugins/fusion-plugin-even-realities-glasses/src/settings.ts

@@ -28,6 +28,10 @@ export const settingsSchema: Record<string, PluginSettingSchema> = {
     type: "string",
     label: "Glasses Device ID",
   },
+  companionWebhookUrl: {
+    type: "string",
+    label: "Companion Webhook URL",
+  },
   pollingIntervalSeconds: {
     type: "number",
     label: "Polling Interval (seconds)",
@@ -65,6 +69,10 @@ export function getFusionToken(settings: Record<string, unknown>): string | unde
   return getSettingString(settings, "fusionApiToken");
 }
 
+export function getCompanionWebhookUrl(settings: Record<string, unknown>): string | undefined {
+  return getSettingString(settings, "companionWebhookUrl");
+}
+
 export function getPollingIntervalMs(settings: Record<string, unknown>): number {
   const raw = settings.pollingIntervalSeconds;
   if (typeof raw !== "number" || !Number.isFinite(raw)) {