imagePage: Make error output look better

Make the errors on the status page translatable. Hide detailed errors
behind an extra error dialog that can be opened.

src/widgets/error_details.rs

@@ -0,0 +1,81 @@
+use adw::prelude::*;
+use adw::subclass::prelude::*;
+use glib::{clone, Properties};
+use gtk::prelude::*;
+use gtk::CompositeTemplate;
+
+use crate::deps::*;
+use crate::util::gettext::*;
+use crate::widgets::LpImage;
+
+mod imp {
+    use super::*;
+
+    #[derive(Debug, Default, CompositeTemplate)]
+    #[template(file = "error_details.ui")]
+    pub struct LpErrorDetails {
+        #[template_child]
+        pub(super) message: TemplateChild<gtk::TextView>,
+        #[template_child]
+        pub(super) copy: TemplateChild<gtk::Button>,
+        #[template_child]
+        pub(super) report: TemplateChild<gtk::Button>,
+    }
+
+    #[glib::object_subclass]
+    impl ObjectSubclass for LpErrorDetails {
+        const NAME: &'static str = "LpErrorDetails";
+        type Type = super::LpErrorDetails;
+        type ParentType = adw::Dialog;
+
+        fn class_init(klass: &mut Self::Class) {
+            Self::bind_template(klass);
+        }
+
+        fn instance_init(obj: &glib::subclass::InitializingObject<Self>) {
+            obj.init_template();
+        }
+    }
+
+    impl ObjectImpl for LpErrorDetails {
+        fn constructed(&self) {
+            self.message.buffer().set_text("Some test text");
+        }
+    }
+    impl WidgetImpl for LpErrorDetails {}
+    impl AdwDialogImpl for LpErrorDetails {}
+}
+
+glib::wrapper! {
+    pub struct LpErrorDetails(ObjectSubclass<imp::LpErrorDetails>)
+        @extends adw::Dialog, gtk::Widget;
+}
+
+impl LpErrorDetails {
+    pub fn new(root: &impl IsA<gtk::Widget>, text: &str) -> Self {
+        let obj = glib::Object::new::<Self>();
+        let imp = obj.imp();
+        imp.message.buffer().set_text(text);
+
+        imp.copy
+            .connect_clicked(glib::clone!(@weak obj => move |_| {
+                let buffer = obj.imp().message.buffer();
+                let (start, end) = buffer.bounds();
+                obj.display()
+                    .clipboard()
+                    .set_text(buffer.text(&start, &end, true).as_str())
+            }));
+
+        imp.report
+            .connect_clicked(glib::clone!(@weak obj => move |_| {
+                gtk::UriLauncher::new("https://gitlab.gnome.org/sophie-h/glycin/-/issues").launch(
+                    obj.root().and_downcast_ref::<gtk::Window>(),
+                    gio::Cancellable::NONE,
+                    |_| {},
+                );
+            }));
+
+        obj.present(root);
+        obj
+    }
+}