Add message filtering by priority and subject, with CRITICAL always visible

- Implement MessagesProxyModel for client-side filtering
- Add priority filter buttons (LOW 0-3, NORMAL 4-8, HIGH 9, CRITICAL 10 always shown)
- Add subject filter menu with checkable actions for message titles
- Add Remove Filters button to reset all filters
- Restore priority 10 persistent notification setting in options
- Fix settings dialog errors and update UI layouts
- Ensure CRITICAL priority messages cannot be filtered out but can toggle persistent pop-ups

gotify_tray/gui/models/MessagesModel.py

@@ -1,5 +1,4 @@
 import enum
-
 from typing import cast
 from PyQt6 import QtCore, QtGui
 from gotify_tray import gotify
@@ -28,7 +27,7 @@ class MessagesModel(QtGui.QStandardItemModel):
         self.update_last_id(message.id)
         message_item = MessagesModelItem(message)
         self.insertRow(row, message_item)
-    
+
     def append_message(self, message: gotify.GotifyMessageModel):
         self.update_last_id(message.id)
         message_item = MessagesModelItem(message)
@@ -39,3 +38,58 @@ class MessagesModel(QtGui.QStandardItemModel):
 
     def itemFromIndex(self, index: QtCore.QModelIndex) -> MessagesModelItem:
         return cast(MessagesModelItem, super(MessagesModel, self).itemFromIndex(index))
+
+
+class MessagesProxyModel(QtCore.QSortFilterProxyModel):
+    unique_titles_updated = QtCore.pyqtSignal(set)
+
+    def __init__(self, parent=None):
+        super().__init__(parent)
+        self.allowed_priorities = set(range(11))  # 0-10
+        self.allowed_titles = set()  # empty means all
+        self.unique_titles = set()
+
+    def set_allowed_priorities(self, priorities: set[int]):
+        self.allowed_priorities = priorities
+        self.invalidateFilter()
+
+    def set_allowed_titles(self, titles: set[str]):
+        print("Proxy setting allowed titles:", titles)
+        self.allowed_titles = titles
+        self.invalidateFilter()
+
+    def update_unique_titles(self):
+        if not self.sourceModel():
+            return
+        titles = set()
+        for row in range(self.sourceModel().rowCount()):
+            index = self.sourceModel().index(row, 0)
+            item = self.sourceModel().itemFromIndex(index)
+            message = item.data(MessageItemDataRole.MessageRole)
+            if message.title:
+                titles.add(message.title)
+        print("Unique titles found:", titles)
+        for row in range(self.sourceModel().rowCount()):
+            index = self.sourceModel().index(row, 0)
+            item = self.sourceModel().itemFromIndex(index)
+            message = item.data(MessageItemDataRole.MessageRole)
+            print(f"Message {row}: title={message.title}, priority={message.priority}")
+        self.unique_titles = titles
+        self.unique_titles_updated.emit(self.unique_titles)
+
+    def filterAcceptsRow(
+        self, source_row: int, source_parent: QtCore.QModelIndex
+    ) -> bool:
+        index = self.sourceModel().index(source_row, 0, source_parent)
+        item = self.sourceModel().itemFromIndex(index)
+        message = item.data(MessageItemDataRole.MessageRole)
+        priority = message.priority if message.priority is not None else 0
+        if self.allowed_priorities and priority not in self.allowed_priorities:
+            return False
+        if (
+            self.allowed_titles
+            and message.title is not None
+            and message.title not in self.allowed_titles
+        ):
+            return False
+        return True