feat: finish the tailscale plugin, including SSH auth (B3)

src/ui/plugin-host/bridge.ts

@@ -25,6 +25,7 @@ import { knownPluginIds } from "./plugin-store";
 import { tabsApi, useShellHosts } from "./shell-bridge";
 import { invokeAction } from "@/shell/action-registry";
 import { useSshAuthProviders } from "@/hooks/useSshAuthProviders";
+import { useActionSlot } from "@/hooks/use-action-slot";
 
 /**
  * Core permission groups, mirroring RESERVED_PERMISSION_PREFIXES in the SDK
@@ -270,6 +271,8 @@ export const pluginHostBridge: PluginHostBridge = {
         })),
     };
   },
+
+  useSlotContributions: (slotId) => useActionSlot(slotId),
 };
 
 /** Installs the bridge. Idempotent. */