feat(mastodon): Add support for editing announcement templates

Updated the template editor and account settings to allow customization of announcement display:

- Added default announcement template to mastodon.defaults.

- Updated templateEditor to recognize announcement variables.

- Added 'Edit template for announcements' button to account configuration dialog.

- Implemented template saving logic in settings controller.

src/controller/mastodon/settings.py

@@ -52,10 +52,12 @@ class accountSettingsController(globalSettingsController):
         post_template = self.config["templates"]["post"]
         conversation_template = self.config["templates"]["conversation"]
         person_template = self.config["templates"]["person"]
-        self.dialog.create_templates(post_template=post_template, conversation_template=conversation_template, person_template=person_template)
+        announcement_template = self.config.get("templates", {}).get("announcement", "$text. Published $published_at. $read")
+        self.dialog.create_templates(post_template=post_template, conversation_template=conversation_template, person_template=person_template, announcement_template=announcement_template)
         widgetUtils.connect_event(self.dialog.templates.post, widgetUtils.BUTTON_PRESSED, self.edit_post_template)
         widgetUtils.connect_event(self.dialog.templates.conversation, widgetUtils.BUTTON_PRESSED, self.edit_conversation_template)
         widgetUtils.connect_event(self.dialog.templates.person, widgetUtils.BUTTON_PRESSED, self.edit_person_template)
+        widgetUtils.connect_event(self.dialog.templates.announcement, widgetUtils.BUTTON_PRESSED, self.edit_announcement_template)
         self.dialog.create_other_buffers()
         buffer_values = self.get_buffers_list()
         self.dialog.buffers.insert_buffers(buffer_values)
@@ -109,6 +111,15 @@ class accountSettingsController(globalSettingsController):
             self.config.write()
             self.dialog.templates.person.SetLabel(_("Edit template for persons. Current template: {}").format(result))
 
+    def edit_announcement_template(self, *args, **kwargs):
+        template = self.config.get("templates", {}).get("announcement", "$text. Published $published_at. $read")
+        control = EditTemplate(template=template, type="announcement")
+        result = control.run_dialog()
+        if result != "": # Template has been saved.
+            self.config["templates"]["announcement"] = result
+            self.config.write()
+            self.dialog.templates.announcement.SetLabel(_("Edit template for announcements. Current template: {}").format(result))
+
     def save_configuration(self):
         if self.config["general"]["relative_times"] != self.dialog.get_value("general", "relative_time"):
             self.needs_restart = True

src/controller/mastodon/templateEditor.py

@@ -2,7 +2,7 @@
 import re
 import wx
 from typing import List
-from sessions.mastodon.templates import post_variables, conversation_variables, person_variables
+from sessions.mastodon.templates import post_variables, conversation_variables, person_variables, announcement_variables
 from wxUI.dialogs import templateDialogs
 
 class EditTemplate(object):
@@ -13,6 +13,8 @@ class EditTemplate(object):
             self.variables = post_variables
         elif type == "conversation":
             self.variables = conversation_variables
+        elif type == "announcement":
+            self.variables = announcement_variables
         else:
             self.variables = person_variables
         self.template: str = template