feat(gui): bus client policy + recovery method wrappers

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

gui/src/bus.rs

@@ -4,7 +4,8 @@
 //! `glib::MainContext::spawn_local`, which polls the future on the GTK main
 //! thread; tokio's reactor wakes the future when zbus I/O is ready.
 
-use authforge_common::types::{Credential, PendingStatus};
+use authforge_common::policy::Policy;
+use authforge_common::types::{Credential, PendingStatus, PolicyApplyResult, RecoveryCodeSummary};
 
 const BUS_NAME: &str = "io.dangerousthings.AuthForge";
 const OBJECT_PATH: &str = "/io/dangerousthings/AuthForge";
@@ -56,6 +57,35 @@ impl Daemon {
     pub async fn clear_pending_flag(&self, user: &str) -> zbus::Result<()> {
         self.proxy.call("ClearPendingFlag", &(user,)).await
     }
+
+    pub async fn get_policy(&self) -> zbus::Result<Policy> {
+        self.proxy.call("GetPolicy", &()).await
+    }
+
+    /// `force=false` runs the daemon's lockout simulator first; on
+    /// violations, returns `PolicyApplyResult { applied: false, violations }`
+    /// without writing.
+    pub async fn set_policy(&self, p: &Policy, force: bool) -> zbus::Result<PolicyApplyResult> {
+        self.proxy.call("SetPolicy", &(p, force)).await
+    }
+
+    pub async fn generate_recovery_code(&self, user: &str) -> zbus::Result<String> {
+        self.proxy.call("GenerateRecoveryCode", &(user,)).await
+    }
+
+    pub async fn list_recovery_codes(&self) -> zbus::Result<Vec<RecoveryCodeSummary>> {
+        self.proxy.call("ListRecoveryCodes", &()).await
+    }
+
+    pub async fn revoke_recovery_code(&self, user: &str) -> zbus::Result<bool> {
+        self.proxy.call("RevokeRecoveryCode", &(user,)).await
+    }
+
+    pub async fn subscribe_policy_changed(
+        &self,
+    ) -> zbus::Result<zbus::proxy::SignalStream<'static>> {
+        self.proxy.receive_signal("PolicyChanged").await
+    }
 }
 
 #[allow(dead_code)] // wired through keys_page.rs in Task 4.