widgets: init font widget

src/settings/setting/widgets/FontWidget.py

+from gi.repository import Gtk, Adw, Pango
+from .BaseWidget import BaseWidget
+
+
+class FontWidget(BaseWidget):
+    def create_row(self):
+        self.row = Adw.ActionRow(title=self.setting.name)
+        self.row.add_css_class("property")
+
+        self.font_dialog = Gtk.FontDialog()
+        self.font_desc = None
+
+        if self.setting.default is not None:
+            self.reset_button = Gtk.Button(
+                icon_name="edit-undo-symbolic",
+                valign=Gtk.Align.CENTER,
+                tooltip_text=_("Restore Default")
+            )
+            self.reset_button.add_css_class("flat")
+            self.reset_button.connect("clicked", self._on_reset_clicked)
+            self.row.add_prefix(self.reset_button)
+
+        arrow_icon = Gtk.Image(
+            icon_name="go-next-symbolic",
+            valign=Gtk.Align.CENTER
+        )
+        self.row.add_suffix(arrow_icon)
+
+        self.row.set_activatable(True)
+        self.row.connect("activated", self._on_row_activated)
+
+        return self.row
+
+    def update_display(self):
+        current_value = self.setting._get_backend_value()
+        if current_value:
+            self.font_desc = Pango.FontDescription.from_string(current_value)
+        else:
+            self.font_desc = None
+        self._update_subtitle()
+        self._update_reset_visibility()
+
+    def _update_subtitle(self):
+        if not self.font_desc:
+            self.row.set_subtitle(_("None"))
+            return
+
+        self.row.set_subtitle(self.font_desc.to_string())
+
+    def _on_row_activated(self, row):
+        self.font_dialog.choose_font(
+            row.get_root(), self.font_desc, None, self._on_font_selected
+        )
+
+    def _on_font_selected(self, dialog, result):
+        try:
+            font_desc = dialog.choose_font_finish(result)
+            if font_desc:
+                self.setting._set_backend_value(font_desc.to_string())
+                self.font_desc = font_desc.copy()
+                self._update_subtitle()
+                self._update_reset_visibility()
+        except Exception as e:
+            self.logger.debug(f"Font selection cancelled: {e}")
+
+    def _on_reset_clicked(self, button):
+        default_value = self.setting.default
+        if default_value is not None:
+            self.setting._set_backend_value(default_value)
+            self.update_display()
+
+    def _update_reset_visibility(self):
+        if self.setting.default is None:
+            return
+
+        current_value = self.setting._get_backend_value()
+        default_value = self.setting.default
+        self.reset_button.set_sensitive(current_value != default_value)

src/settings/setting/widgets/__init__.py

@@ -43,6 +43,7 @@ class WidgetFactory:
         'info_graph_large': InfoGraphLargeWidget,
         'info_graph_multi': InfoGraphMultiWidget,
         'list_dual': DualListWidget,
+        'font': FontWidget,
     }
 
     @staticmethod