refactor(gui): extract AppContext for shared page handles

KeysPage::new now takes a single AppContext that owns parent_window,
toast_overlay, and the shared daemon Rc<RefCell<Option<Daemon>>>. Phases
9, 10, 11, and 12 GUI tab will all consume this struct.

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

gui/src/app_context.rs

@@ -0,0 +1,27 @@
+//! Shared per-window handles passed to every page constructor.
+//!
+//! `daemon` is a `RefCell<Option<...>>` because the connect-on-startup attempt
+//! may fail (pages render their disconnected banner); a successful Retry
+//! repopulates this same cell, and every page sees the new value via the Rc
+//! clone chain.
+
+use crate::bus::Daemon;
+use std::cell::RefCell;
+use std::rc::Rc;
+
+#[derive(Clone)]
+pub(crate) struct AppContext {
+    pub parent_window: gtk::Window,
+    pub toast_overlay: adw::ToastOverlay,
+    pub daemon: Rc<RefCell<Option<Daemon>>>,
+}
+
+impl AppContext {
+    pub fn new(parent_window: gtk::Window, toast_overlay: adw::ToastOverlay) -> Self {
+        Self {
+            parent_window,
+            toast_overlay,
+            daemon: Rc::new(RefCell::new(None)),
+        }
+    }
+}

gui/src/keys_page.rs

@@ -1,27 +1,23 @@
 //! "Security keys" preferences page. v1 surface: the current user's enrolled
 //! FIDO2 credentials with per-row remove + a single "Enroll a new key" button.
 
+use crate::app_context::AppContext;
 use crate::bus::{current_user, Daemon};
 use crate::error::user_message;
 use adw::prelude::*;
 use gtk::glib;
-use std::cell::RefCell;
 use std::rc::Rc;
 
 pub(crate) struct KeysPage {
     pub root: adw::Bin,
-    daemon: Rc<RefCell<Option<Daemon>>>,
+    ctx: AppContext,
-    parent_window: gtk::Window,
-    toast_overlay: adw::ToastOverlay,
 }
 
 impl KeysPage {
-    pub fn new(parent_window: gtk::Window, toast_overlay: adw::ToastOverlay) -> Rc<Self> {
+    pub fn new(ctx: AppContext) -> Rc<Self> {
         let page = Rc::new(Self {
             root: adw::Bin::new(),
-            daemon: Rc::new(RefCell::new(None)),
+            ctx,
-            parent_window,
-            toast_overlay,
         });
         let p = page.clone();
         glib::MainContext::default().spawn_local(async move {
@@ -33,7 +29,7 @@ impl KeysPage {
     async fn try_connect_and_render(self: Rc<Self>) {
         match Daemon::connect().await {
             Ok(d) => {
-                *self.daemon.borrow_mut() = Some(d);
+                *self.ctx.daemon.borrow_mut() = Some(d);
                 self.render_connected().await;
             }
             Err(e) => self.render_disconnected(&user_message(&e)),
@@ -63,7 +59,7 @@ impl KeysPage {
     }
 
     async fn render_connected(self: &Rc<Self>) {
-        let daemon = match self.daemon.borrow().clone() {
+        let daemon = match self.ctx.daemon.borrow().clone() {
             Some(d) => d,
             None => {
                 self.render_disconnected("internal: daemon handle missing");
@@ -140,7 +136,7 @@ impl KeysPage {
     }
 
     async fn remove_credential(self: &Rc<Self>, cred_id: &str) {
-        let daemon = match self.daemon.borrow().clone() {
+        let daemon = match self.ctx.daemon.borrow().clone() {
             Some(d) => d,
             None => return,
         };
@@ -153,12 +149,12 @@ impl KeysPage {
     }
 
     async fn start_enroll(self: &Rc<Self>) {
-        let daemon = match self.daemon.borrow().clone() {
+        let daemon = match self.ctx.daemon.borrow().clone() {
             Some(d) => d,
             None => return,
         };
         let me = self.clone();
-        crate::enroll_dialog::present(&self.parent_window, daemon, move || {
+        crate::enroll_dialog::present(&self.ctx.parent_window, daemon, move || {
             let me = me.clone();
             glib::MainContext::default().spawn_local(async move {
                 me.render_connected().await;
@@ -168,7 +164,7 @@ impl KeysPage {
 
     fn show_toast(self: &Rc<Self>, msg: &str) {
         let toast = adw::Toast::builder().title(msg).timeout(5).build();
-        self.toast_overlay.add_toast(toast);
+        self.ctx.toast_overlay.add_toast(toast);
     }
 }
 

gui/src/main.rs

@@ -1,6 +1,7 @@
 use adw::prelude::*;
 use gtk::glib;
 
+mod app_context;
 mod bus;
 mod enroll_dialog;
 mod error;
@@ -36,7 +37,8 @@ fn main() -> glib::ExitCode {
         header.set_title_widget(Some(&switcher));
 
         let toast_overlay = adw::ToastOverlay::new();
-        let keys = keys_page::KeysPage::new(win.clone().upcast(), toast_overlay.clone());
+        let ctx = app_context::AppContext::new(win.clone().upcast(), toast_overlay.clone());
+        let keys = keys_page::KeysPage::new(ctx.clone());
         stack.add_titled(&keys.root, Some("keys"), "Keys");
 
         // ToolbarView is libadwaita v1_4-gated; the project sticks with the