feat(gui): list enrolled credentials with per-row remove + enroll button

gui/src/keys_page.rs

@@ -1,8 +1,7 @@
 //! "Security keys" preferences page. v1 surface: the current user's enrolled
 //! FIDO2 credentials with per-row remove + a single "Enroll a new key" button.
-//! Task 4 lands the empty state + retry banner; Task 5 fills in the list.
 
-use crate::bus::Daemon;
+use crate::bus::{current_user, Daemon};
 use crate::error::user_message;
 use adw::prelude::*;
 use gtk::glib;
@@ -63,17 +62,112 @@ impl KeysPage {
     }
 
     async fn render_connected(self: &Rc<Self>) {
-        // Placeholder until Task 5 fills in the list.
+        let daemon = match self.daemon.borrow().clone() {
+            Some(d) => d,
+            None => {
+                self.render_disconnected("internal: daemon handle missing");
+                return;
+            }
+        };
+
+        let user = current_user();
+        let creds = match daemon.list_credentials(&user).await {
+            Ok(v) => v,
+            Err(e) => {
+                self.render_disconnected(&user_message(&e));
+                return;
+            }
+        };
+
         let page = adw::PreferencesPage::new();
         let group = adw::PreferencesGroup::builder()
             .title("Security keys")
-            .description("FIDO2 keys enrolled for your account")
+            .description(if creds.is_empty() {
+                "No keys enrolled yet. Click below to enroll your first."
+            } else {
+                "FIDO2 keys enrolled for your account"
+            })
             .build();
-        let placeholder = adw::ActionRow::builder()
-            .title("(Task 5 will populate this)")
+
+        for c in &creds {
+            let title = if c.nickname.is_empty() {
+                c.id.as_str()
+            } else {
+                c.nickname.as_str()
+            };
+            let row = adw::ActionRow::builder()
+                .title(title)
+                .subtitle(short_id(&c.id))
+                .build();
+            let remove = gtk::Button::builder()
+                .icon_name("user-trash-symbolic")
+                .valign(gtk::Align::Center)
+                .css_classes(["flat"])
+                .tooltip_text("Remove this key")
+                .build();
+            let me = self.clone();
+            let cred_id = c.id.clone();
+            remove.connect_clicked(move |_| {
+                let me = me.clone();
+                let cred_id = cred_id.clone();
+                glib::MainContext::default().spawn_local(async move {
+                    me.remove_credential(&cred_id).await;
+                });
+            });
+            row.add_suffix(&remove);
+            group.add(&row);
+        }
+
+        let enroll_group = adw::PreferencesGroup::new();
+        let enroll = adw::ActionRow::builder()
+            .title("Enroll a new key")
+            .activatable(true)
             .build();
-        group.add(&placeholder);
+        enroll.add_suffix(&gtk::Image::builder().icon_name("list-add-symbolic").build());
+        let me = self.clone();
+        enroll.connect_activated(move |_| {
+            let me = me.clone();
+            glib::MainContext::default().spawn_local(async move {
+                me.start_enroll().await;
+            });
+        });
+        enroll_group.add(&enroll);
+
         page.add(&group);
+        page.add(&enroll_group);
         self.root.set_child(Some(&page));
     }
+
+    async fn remove_credential(self: &Rc<Self>, cred_id: &str) {
+        let daemon = match self.daemon.borrow().clone() {
+            Some(d) => d,
+            None => return,
+        };
+        let user = current_user();
+        if let Err(e) = daemon.remove_own(&user, cred_id).await {
+            self.show_toast(&user_message(&e));
+            return;
+        }
+        self.render_connected().await;
+    }
+
+    async fn start_enroll(self: &Rc<Self>) {
+        // Stub until Task 6 lands the TouchDialog. Until then, surface the
+        // intent so manual smoke can see the click was registered.
+        self.show_toast("Enroll: implemented in Task 6");
+    }
+
+    fn show_toast(self: &Rc<Self>, msg: &str) {
+        // ToastOverlay wiring lands in Task 7. Until then write to stderr so
+        // manual smoke can observe what would be shown.
+        eprintln!("[gui toast] {msg}");
+    }
+}
+
+fn short_id(id: &str) -> String {
+    if id.len() > 16 {
+        format!("{}…{}", &id[..8], &id[id.len() - 4..])
+    } else {
+        id.to_string()
+    }
 }