feat: replace core homepage widget registry with generic extension points

plugins/tunnels/src/frontend/index.tsx

@@ -1,10 +1,6 @@
 import type { ComponentType } from "react";
 import { Network, Plug } from "lucide-react";
-import type {
-  HomepageWidgetContribution,
-  TabProps,
-  TermixApp,
-} from "@termix/plugin-sdk/frontend";
+import type { TabProps, TermixApp } from "@termix/plugin-sdk/frontend";
 import { TunnelTab } from "./TunnelTab";
 import { HostTunnelsSection } from "./HostTunnelsSection";
 import {
@@ -84,7 +80,7 @@ export function activate(app: TermixApp): void {
     icon: Plug as ComponentType<{ className?: string }>,
   });
 
-  app.registerHomepageWidget({
+  app.registerExtension("homepage.widgets", {
     id: "tunnel_widget",
     name: "Tunnel Manager",
     description: "Embedded SSH tunnel manager for a configured host",
@@ -93,9 +89,8 @@ export function activate(app: TermixApp): void {
     defaultConfig: { hostId: 0 },
     defaultSize: { w: GRID_SIZE * 16, h: GRID_SIZE * 10 },
     minSize: { w: GRID_SIZE * 8, h: GRID_SIZE * 6 },
-    component: TunnelWidget,
-    editFormComponent: TunnelWidgetEditForm,
-  } as HomepageWidgetContribution);
+    components: { view: TunnelWidget, editForm: TunnelWidgetEditForm },
+  });
 
   // The dashboard's active tunnel counter.
   app.registerAction(