feat(gui): polish pass over wording, icons and responsiveness

The Sync page gives each folder one card with its state, a Synced /
Online only switch and a menu for the rest; switching either way asks
first and the download prompt shows the free space on the disk.

Enabling, disabling and restarting the Proton Drive service ran
systemctl on GTK's main thread and froze the window. They now run in
the background, and every Retry button goes through one shared restart
helper.

Ten icons are bundled under resources/icons for glyphs no stock theme
has or that read ambiguously (sync, share, people, link, menu, map and
so on). A new test fails when the app or search prompt asks for a
symbolic icon that is neither bundled nor on a list checked against
Adwaita 50, libadwaita and GTK, or when a bundled icon is missing from
the resource manifest. The tray's sync icon, which Adwaita 50 no longer
ships, is now view-refresh.

Wording follows one glossary, recorded in docs/TRANSLATING.md: "Proton
Drive service" instead of "mount service" or "daemon", "Online only"
instead of "On-demand", "Proton Drive folder" instead of "mountpoint".
Dialog headings and buttons use title case and page titles match the
sidebar. Dates go through one formatter (app/dates.rs) and sizes
through i18n::human_bytes, and the cache label is translated.

The status tick stops while the window is hidden or minimized and runs
every fifth tick while it is unfocused, refreshing as soon as it gains
focus. "Sync complete" is announced only for large batches and only
when the window isn't focused. Smaller fixes: Empty Trash hides when
there is nothing to empty, copy buttons confirm with a check mark, the
sidebar status spins until the first report, and Photos moves Import
and Find Duplicates into a menu beside a labelled Select toggle.

All catalogs are updated and complete.

crates/pdfs-gui/src/app/widgets/details.rs

@@ -49,7 +49,7 @@ pub(crate) struct DetailsWidgets {
 /// [`DirEntry`] and [`wire_details`] connects the buttons.
 pub(crate) fn build_details_pane() -> (gtk4::Widget, DetailsWidgets) {
     let toggle = gtk4::ToggleButton::builder()
-        .icon_name("sidebar-show-right-symbolic")
+        .icon_name("pdfs-details-pane-symbolic")
         .tooltip_text(gettext("Details (Alt+Enter)"))
         .build();
 
@@ -202,7 +202,7 @@ pub(crate) fn build_details_pane() -> (gtk4::Widget, DetailsWidgets) {
     let toggle_off = toggle.clone();
     empty_close.connect_clicked(move |_| toggle_off.set_active(false));
     let empty_status = adw::StatusPage::builder()
-        .icon_name("sidebar-show-right-symbolic")
+        .icon_name("pdfs-details-pane-symbolic")
         .title(gettext("No item selected"))
         .description(gettext("Select a file or folder to see its details."))
         .vexpand(true)
@@ -373,7 +373,7 @@ pub(crate) fn show_details(ui: &Rc<Ui>, entry: &DirEntry) {
     });
     d.size_row.set_visible(!entry.is_dir);
     d.modified_row
-        .set_subtitle(&format_modified(entry.modified));
+        .set_subtitle(&dates::short_date(entry.modified));
     let rel = entry_rel(ui, entry);
     let parent = match rel.rfind('/') {
         Some(i) => &rel[..i],
@@ -494,13 +494,13 @@ pub(crate) fn versions_summary(items: &[RevisionInfo]) -> String {
     match (items.len(), latest) {
         (0, _) | (_, None) => gettext("No earlier versions"),
         // Translators: {date} is the date of the only version.
-        (1, Some(t)) => gettext_f("1 version · {date}", &[("date", &format_modified(t))]),
+        (1, Some(t)) => gettext_f("1 version · {date}", &[("date", &dates::short_date(t))]),
         // Translators: {date} is the date of the newest version.
         (n, Some(t)) => ngettext_f(
             "{n} version · latest {date}",
             "{n} versions · latest {date}",
             n as u64,
-            &[("date", &format_modified(t))],
+            &[("date", &dates::short_date(t))],
         ),
     }
 }

crates/pdfs-gui/src/app/widgets/share_dialog.rs

@@ -427,7 +427,7 @@ pub(crate) fn share_dialog_reload(state: &Rc<ShareDialog>) {
             _ => toast_error(
                 &state.ui,
                 &gettext("Couldn't load sharing"),
-                &gettext("The mount service didn't respond."),
+                &gettext("The Proton Drive service didn't respond."),
             ),
         }
     });
@@ -582,6 +582,7 @@ pub(crate) fn repaint_share_link(state: &Rc<ShareDialog>, link: Option<&PublicLi
                 let url_copy = url.clone();
                 copy.connect_clicked(move |btn| {
                     btn.clipboard().set_text(&url_copy);
+                    flash_copied(btn, "edit-copy-symbolic");
                     toast(&state_copy.ui, &gettext("Link copied"));
                 });
                 row.add_suffix(&copy);
@@ -718,7 +719,7 @@ pub(crate) fn share_dialog_create_link(
             _ => toast_error(
                 &state.ui,
                 &gettext("Couldn't create the link"),
-                &gettext("The mount service didn't respond."),
+                &gettext("The Proton Drive service didn't respond."),
             ),
         }
     });
@@ -756,7 +757,7 @@ pub(crate) fn share_dialog_op(
                 toast_error(
                     &state.ui,
                     &failed,
-                    &gettext("The mount service didn't respond."),
+                    &gettext("The Proton Drive service didn't respond."),
                 );
                 share_dialog_reload(&state);
             }

crates/pdfs-gui/src/app/widgets/versions_dialog.rs

@@ -167,7 +167,7 @@ pub(crate) fn versions_dialog_reload(state: &Rc<VersionsDialog>) {
             _ => toast_error(
                 &state.ui,
                 &gettext("Couldn't load versions"),
-                &gettext("The mount service didn't respond."),
+                &gettext("The Proton Drive service didn't respond."),
             ),
         }
     });
@@ -204,13 +204,13 @@ fn repaint_versions(state: &Rc<VersionsDialog>, items: &[RevisionInfo]) {
                 gettext_f(
                     "{time} · {size}",
                     &[
-                        ("time", &activity_time(item.created)),
+                        ("time", &dates::relative(item.created)),
                         ("size", &human_bytes(size)),
                     ],
                 ),
             )
         } else {
-            (activity_time(item.created), human_bytes(size))
+            (dates::relative(item.created), human_bytes(size))
         };
         if let Some(email) = &item.signed_by {
             subtitle.push_str(" · ");
@@ -266,7 +266,7 @@ fn repaint_versions(state: &Rc<VersionsDialog>, items: &[RevisionInfo]) {
 /// every device on the account, not only this one.
 fn prompt_restore_version(state: &Rc<VersionsDialog>, revision_id: &str) {
     let dialog = adw::AlertDialog::builder()
-        .heading(gettext("Restore version"))
+        .heading(gettext("Restore Version?"))
         // Translators: {name} is a file name.
         .body(gettext_f(
             "Make this version the current content of “{name}”? The version it replaces stays in the history.",
@@ -301,7 +301,7 @@ fn prompt_restore_version(state: &Rc<VersionsDialog>, revision_id: &str) {
 /// Confirm, then permanently delete one revision.
 fn prompt_delete_version(state: &Rc<VersionsDialog>, revision_id: &str) {
     let dialog = adw::AlertDialog::builder()
-        .heading(gettext("Delete version"))
+        .heading(gettext("Delete Version?"))
         .body(gettext(
             "Delete this version permanently? Its content can't be recovered.",
         ))
@@ -377,7 +377,7 @@ fn versions_dialog_op(state: &Rc<VersionsDialog>, request: Request, done: &str,
             _ => toast_error(
                 &state.ui,
                 &failed,
-                &gettext("The mount service didn't respond."),
+                &gettext("The Proton Drive service didn't respond."),
             ),
         }
     });