fix: tokio runtime, Enter-to-login, and server URL handling

Three bugs fixed:

- No tokio reactor: glib::spawn_future_local does not provide a
  tokio context, so reqwest/hyper panicked at runtime. Introduce
  src/runtime.rs with a multi-thread tokio Runtime (init() called
  from main before the GTK app starts). runtime::spawn() posts the
  async result back to GTK via a tokio oneshot channel awaited by
  glib::spawn_future_local, which only polls a flag (no I/O).
  runtime::spawn_bg() is used for fire-and-forget background calls.

- Enter key didn't submit login: connect_apply on AdwEntryRow only
  fires when show-apply-button is true. Switch to connect_entry_activated
  which fires on Return in all three login rows.

- Wrong API URL: the app constructed /accounts/ClientLogin directly
  off the server host, yielding a 404. Add normalize_base_url() in
  api.rs that appends /api/greader.php when the URL doesn't already
  contain it, so users can enter just https://rss.example.com.

data/ui/login_dialog.blp

@@ -20,6 +20,7 @@ template $LoginDialog : Adw.Dialog {
           title: _("Server URL");
           input-hints: no_spellcheck;
           input-purpose: url;
+          // e.g. https://rss.example.com — /api/greader.php is added automatically
         }
 
         Adw.EntryRow username_row {

src/api.rs

@@ -42,14 +42,26 @@ struct Summary {
 
 use crate::model::Article;
 
+fn normalize_base_url(server_url: &str) -> String {
+    let base = server_url.trim_end_matches('/');
+    // If the user entered just a host (or host/path) without the FreshRSS
+    // API suffix, append it automatically.
+    if base.ends_with("/api/greader.php") {
+        base.to_string()
+    } else {
+        format!("{base}/api/greader.php")
+    }
+}
+
 impl Api {
     pub async fn login(
         server_url: &str,
         username: &str,
         password: &str,
     ) -> Result<Self, String> {
+        let base = normalize_base_url(server_url);
         let client = Client::new();
-        let url = format!("{}/accounts/ClientLogin", server_url.trim_end_matches('/'));
+        let url = format!("{base}/accounts/ClientLogin");
         let resp = client
             .post(&url)
             .form(&[("Email", username), ("Passwd", password)])
@@ -72,7 +84,7 @@ impl Api {
 
         Ok(Self {
             client,
-            server_url: server_url.trim_end_matches('/').to_string(),
+            server_url: base,
             auth_token,
         })
     }

src/login_dialog.rs

@@ -68,6 +68,7 @@ mod imp {
         fn constructed(&self) {
             self.parent_constructed();
 
+            // Login button
             let obj_weak = self.obj().downgrade();
             self.login_button.connect_activated(move |_| {
                 if let Some(dialog) = obj_weak.upgrade() {
@@ -75,9 +76,20 @@ mod imp {
                 }
             });
 
-            // Also trigger on Enter in password row
+            // Enter in any row submits the form (connect_entry_activated fires on Return)
+            for weak in [
+                self.server_url_row.downgrade(),
+                self.username_row.downgrade(),
+            ] {
+                let obj_weak = self.obj().downgrade();
+                weak.upgrade().unwrap().connect_entry_activated(move |_| {
+                    if let Some(dialog) = obj_weak.upgrade() {
+                        dialog.imp().on_login_clicked();
+                    }
+                });
+            }
             let obj_weak2 = self.obj().downgrade();
-            self.password_row.connect_apply(move |_| {
+            self.password_row.connect_entry_activated(move |_| {
                 if let Some(dialog) = obj_weak2.upgrade() {
                     dialog.imp().on_login_clicked();
                 }
@@ -87,14 +99,21 @@ mod imp {
 
     impl LoginDialog {
         fn on_login_clicked(&self) {
-            let server_url = self.server_url_row.text().trim().to_string();
+            let raw_url = self.server_url_row.text().trim().to_string();
             let username = self.username_row.text().trim().to_string();
             let password = self.password_row.text().to_string();
 
-            if server_url.is_empty() || username.is_empty() || password.is_empty() {
+            if raw_url.is_empty() || username.is_empty() || password.is_empty() {
                 return;
             }
 
+            // Prepend https:// if no scheme given
+            let server_url = if raw_url.starts_with("http://") || raw_url.starts_with("https://") {
+                raw_url
+            } else {
+                format!("https://{raw_url}")
+            };
+
             self.obj().close();
             self.obj().emit_by_name::<()>("logged-in", &[&server_url, &username, &password]);
         }

src/main.rs

@@ -4,6 +4,7 @@ mod article_row;
 mod credentials;
 mod login_dialog;
 mod model;
+mod runtime;
 mod window;
 
 fn main() -> glib::ExitCode {
@@ -12,6 +13,10 @@ fn main() -> glib::ExitCode {
         std::env::set_var("GSETTINGS_SCHEMA_DIR", env!("GSETTINGS_SCHEMA_DIR"));
     }
 
+    // Start the tokio multi-thread runtime before the GTK app so that
+    // reqwest/hyper can find it when API futures are spawned.
+    runtime::init();
+
     let app = app::FeedTheMonkeyApp::new();
     app.run()
 }

src/runtime.rs

@@ -0,0 +1,50 @@
+use std::sync::OnceLock;
+use tokio::runtime::Runtime;
+
+static RT: OnceLock<Runtime> = OnceLock::new();
+
+pub fn init() {
+    RT.get_or_init(|| {
+        tokio::runtime::Builder::new_multi_thread()
+            .enable_all()
+            .build()
+            .expect("failed to build tokio runtime")
+    });
+}
+
+/// Spawn `future` on the tokio runtime. When it completes, `callback`
+/// is invoked on the GLib main context (GTK main thread).
+///
+/// Works by routing the result through a tokio oneshot channel; the
+/// receiving end is awaited by `glib::spawn_future_local`, which runs
+/// on the GLib event loop but does no I/O, so it never needs tokio's
+/// reactor itself.
+pub fn spawn<F, T, C>(future: F, callback: C)
+where
+    F: std::future::Future<Output = T> + Send + 'static,
+    T: Send + 'static,
+    C: FnOnce(T) + 'static,
+{
+    let (tx, rx) = tokio::sync::oneshot::channel::<T>();
+
+    RT.get().expect("runtime not initialised").spawn(async move {
+        let result = future.await;
+        let _ = tx.send(result);
+    });
+
+    // The receive future only polls a mutex-protected flag — no I/O,
+    // so running it on the GLib event loop is fine.
+    glib::spawn_future_local(async move {
+        if let Ok(value) = rx.await {
+            callback(value);
+        }
+    });
+}
+
+/// Fire-and-forget: spawn on the tokio runtime, no callback.
+pub fn spawn_bg<F>(future: F)
+where
+    F: std::future::Future<Output = ()> + Send + 'static,
+{
+    RT.get().expect("runtime not initialised").spawn(future);
+}

src/window.rs

@@ -271,12 +271,7 @@ pub mod imp {
 
         fn auto_login(&self) {
             if let Some((server_url, username, password)) = credentials::load_credentials() {
-                let win_weak = self.obj().downgrade();
-                glib::spawn_future_local(async move {
-                    if let Some(win) = win_weak.upgrade() {
-                        win.imp().do_login(server_url, username, password, false).await;
-                    }
-                });
+                self.do_login(server_url, username, password, false);
             } else {
                 self.show_login_dialog();
             }
@@ -291,39 +286,49 @@ pub mod imp {
                 let username = args[2].get::<String>().unwrap();
                 let password = args[3].get::<String>().unwrap();
                 if let Some(win) = win_weak.upgrade() {
-                    glib::spawn_future_local(async move {
-                        win.imp().do_login(server_url, username, password, true).await;
-                    });
+                    win.imp().do_login(server_url, username, password, true);
                 }
                 None
             });
             dialog.present(Some(win.upcast_ref::<gtk4::Widget>()));
         }
 
-        pub async fn do_login(
-            &self,
-            server_url: String,
-            username: String,
-            password: String,
-            store: bool,
-        ) {
-            match Api::login(&server_url, &username, &password).await {
-                Ok(api) => {
-                    if store {
-                        credentials::store_credentials(&server_url, &username, &password);
+        fn do_login(&self, server_url: String, username: String, password: String, store: bool) {
+            let win_weak = self.obj().downgrade();
+            crate::runtime::spawn(
+                async move { Api::login(&server_url, &username, &password).await
+                    .map(|api| (api, server_url, username, password)) },
+                move |result| {
+                    let Some(win) = win_weak.upgrade() else { return };
+                    match result {
+                        Ok((api, server_url, username, password)) => {
+                            if store {
+                                credentials::store_credentials(&server_url, &username, &password);
+                            }
+                            // Fetch write token in background (non-critical)
+                            let api_clone = api.clone();
+                            let win_weak2 = win.downgrade();
+                            crate::runtime::spawn(
+                                async move { api_clone.fetch_write_token().await },
+                                move |wt_result| {
+                                    if let Some(win) = win_weak2.upgrade() {
+                                        match wt_result {
+                                            Ok(wt) => *win.imp().write_token.borrow_mut() = Some(wt),
+                                            Err(e) => eprintln!("Write token error: {e}"),
+                                        }
+                                    }
+                                },
+                            );
+                            *win.imp().api.borrow_mut() = Some(api);
+                            win.imp().fetch_articles();
+                        }
+                        Err(e) => {
+                            win.imp().show_login_dialog();
+                            win.imp().show_error_dialog("Login Failed", &e);
+                        }
                     }
-                    match api.fetch_write_token().await {
-                        Ok(wt) => *self.write_token.borrow_mut() = Some(wt),
-                        Err(e) => eprintln!("Write token error: {e}"),
-                    }
-                    *self.api.borrow_mut() = Some(api);
-                    self.fetch_articles().await;
-                }
-                Err(e) => {
-                    self.show_login_dialog();
-                    self.show_error_dialog("Login Failed", &e);
-                }
-            }
+                },
+            );
         }
 
         fn show_error_dialog(&self, title: &str, body: &str) {
@@ -364,42 +369,44 @@ pub mod imp {
         // ── Fetch articles ────────────────────────────────────────────────────
 
         fn do_reload(&self) {
-            let win_weak = self.obj().downgrade();
-            glib::spawn_future_local(async move {
-                if let Some(win) = win_weak.upgrade() {
-                    win.imp().fetch_articles().await;
-                }
-            });
+            self.fetch_articles();
         }
 
-        pub async fn fetch_articles(&self) {
+        fn fetch_articles(&self) {
             let api = self.api.borrow().clone();
             let Some(api) = api else { return };
 
             self.refresh_stack.set_visible_child_name("spinner");
             self.sidebar_content.set_visible_child_name("loading");
 
-            match api.fetch_unread().await {
-                Ok(articles) => {
-                    let store = self.article_store.borrow();
-                    let store = store.as_ref().unwrap();
-                    store.remove_all();
-                    for a in articles {
-                        store.append(&ArticleObject::new(a));
+            let win_weak = self.obj().downgrade();
+            crate::runtime::spawn(
+                async move { api.fetch_unread().await },
+                move |result| {
+                    let Some(win) = win_weak.upgrade() else { return };
+                    let imp = win.imp();
+                    match result {
+                        Ok(articles) => {
+                            let store = imp.article_store.borrow();
+                            let store = store.as_ref().unwrap();
+                            store.remove_all();
+                            for a in articles {
+                                store.append(&ArticleObject::new(a));
+                            }
+                            if store.n_items() == 0 {
+                                imp.sidebar_content.set_visible_child_name("empty");
+                            } else {
+                                imp.sidebar_content.set_visible_child_name("list");
+                            }
+                        }
+                        Err(e) => {
+                            imp.error_status.set_description(Some(&e));
+                            imp.sidebar_content.set_visible_child_name("error");
+                        }
                     }
-                    if store.n_items() == 0 {
-                        self.sidebar_content.set_visible_child_name("empty");
-                    } else {
-                        self.sidebar_content.set_visible_child_name("list");
-                    }
-                }
-                Err(e) => {
-                    self.error_status.set_description(Some(&e));
-                    self.sidebar_content.set_visible_child_name("error");
-                }
-            }
-
-            self.refresh_stack.set_visible_child_name("button");
+                    imp.refresh_stack.set_visible_child_name("button");
+                },
+            );
         }
 
         // ── Read state ────────────────────────────────────────────────────────
@@ -408,7 +415,7 @@ pub mod imp {
             let api = self.api.borrow().clone();
             let wt = self.write_token.borrow().clone();
             if let (Some(api), Some(wt)) = (api, wt) {
-                glib::spawn_future_local(async move {
+                crate::runtime::spawn_bg(async move {
                     if let Err(e) = api.mark_read(&wt, &item_id).await {
                         eprintln!("mark_read error: {e}");
                     }
@@ -437,7 +444,7 @@ pub mod imp {
             let wt = self.write_token.borrow().clone();
             if let (Some(api), Some(wt)) = (api, wt) {
                 let id_clone = id.clone();
-                glib::spawn_future_local(async move {
+                crate::runtime::spawn_bg(async move {
                     if let Err(e) = api.mark_unread(&wt, &id_clone).await {
                         eprintln!("mark_unread error: {e}");
                     }