Add event filtering with collapsible expanders and human-readable event type names

- Add comprehensive event filtering (event types, categories, persons, date range)
- Implement collapsible Gtk.Expander widgets for event type groups
- Add human-readable event type names in filter dialog
- Add EVENT_CATEGORIES mapping for event categorization
- Add filter state management and filter application logic
- Add filter button to toolbar with active state indication
- Support multiple filter types that can be combined

MyTimeline.py

@@ -705,8 +705,9 @@ class MyTimelineView(NavigationView):
                 category_boxes[category] = category_box
                 box.pack_start(category_box, False, False, 0)
             
-            # Create checkbox for event type
+            # Create checkbox for event type with human-readable name
-            checkbox = Gtk.CheckButton(label=str(event_type_obj))
+            event_type_name = self._get_event_type_display_name(event_type_obj)
+            checkbox = Gtk.CheckButton(label=event_type_name)
             event_type_checkboxes[event_type_obj] = checkbox
             category_boxes[category].pack_start(checkbox, False, False, 0)
         
@@ -1329,6 +1330,71 @@ class MyTimelineView(NavigationView):
             return True
         return person_handle in self.person_filter
 
+    def _get_event_type_display_name(self, event_type: EventType) -> str:
+        """
+        Get human-readable display name for an event type.
+        
+        Args:
+            event_type: The event type (integer or EventType object).
+            
+        Returns:
+            str: Human-readable name for the event type.
+        """
+        # Normalize to integer first
+        event_type_value = self._normalize_event_type(event_type)
+        
+        # Map EventType integer values to their human-readable names
+        event_type_names = {
+            EventType.BIRTH: _("Birth"),
+            EventType.DEATH: _("Death"),
+            EventType.BURIAL: _("Burial"),
+            EventType.CREMATION: _("Cremation"),
+            EventType.ADOPT: _("Adoption"),
+            EventType.MARRIAGE: _("Marriage"),
+            EventType.DIVORCE: _("Divorce"),
+            EventType.ENGAGEMENT: _("Engagement"),
+            EventType.MARR_SETTL: _("Marriage Settlement"),
+            EventType.MARR_LIC: _("Marriage License"),
+            EventType.MARR_CONTR: _("Marriage Contract"),
+            EventType.MARR_BANNS: _("Marriage Banns"),
+            EventType.DIV_FILING: _("Divorce Filing"),
+            EventType.ANNULMENT: _("Annulment"),
+            EventType.MARR_ALT: _("Marriage (Alternative)"),
+            EventType.BAPTISM: _("Baptism"),
+            EventType.ADULT_CHRISTEN: _("Adult Christening"),
+            EventType.CONFIRMATION: _("Confirmation"),
+            EventType.CHRISTEN: _("Christening"),
+            EventType.FIRST_COMMUN: _("First Communion"),
+            EventType.BLESS: _("Blessing"),
+            EventType.BAR_MITZVAH: _("Bar Mitzvah"),
+            EventType.BAS_MITZVAH: _("Bat Mitzvah"),
+            EventType.RELIGION: _("Religion"),
+            EventType.ORDINATION: _("Ordination"),
+            EventType.OCCUPATION: _("Occupation"),
+            EventType.RETIREMENT: _("Retirement"),
+            EventType.ELECTED: _("Elected"),
+            EventType.MILITARY_SERV: _("Military Service"),
+            EventType.EDUCATION: _("Education"),
+            EventType.GRADUATION: _("Graduation"),
+            EventType.DEGREE: _("Degree"),
+            EventType.EMIGRATION: _("Emigration"),
+            EventType.IMMIGRATION: _("Immigration"),
+            EventType.NATURALIZATION: _("Naturalization"),
+            EventType.PROBATE: _("Probate"),
+            EventType.WILL: _("Will"),
+            EventType.RESIDENCE: _("Residence"),
+            EventType.CENSUS: _("Census"),
+            EventType.PROPERTY: _("Property"),
+            EventType.CAUSE_DEATH: _("Cause of Death"),
+            EventType.MED_INFO: _("Medical Information"),
+            EventType.NOB_TITLE: _("Nobility Title"),
+            EventType.NUM_MARRIAGES: _("Number of Marriages"),
+            EventType.UNKNOWN: _("Unknown"),
+            EventType.CUSTOM: _("Custom"),
+        }
+        
+        return event_type_names.get(event_type_value, _("Unknown Event"))
+
     def _get_event_category(self, event_type: EventType) -> str:
         """
         Get the category for an event type.