Fixes GTK4 Layer Shell and Ollama integration issues

Addresses multiple issues related to GTK4 Layer Shell initialization and Ollama integration.

- Reorders initialization to ensure the layer shell is set up before window properties.
- Adds error detection for layer shell initialization failures.
- Implements a focus event handler to prevent focus-out warnings.
- Introduces a launcher script to activate the virtual environment, force native Wayland, and preload the GTK4 Layer Shell library.
- Warns users of incorrect GDK_BACKEND settings.
- Updates the Ollama client to handle responses from both older and newer versions of the Ollama SDK.

These changes improve the application's stability, compatibility, and functionality on Wayland systems.

sidebar_window.py

@@ -25,6 +25,10 @@ class SidebarWindow(Gtk.ApplicationWindow):
 
     def __init__(self, **kwargs) -> None:
         super().__init__(**kwargs)
+
+        # CRITICAL: Layer shell must be initialized BEFORE any window properties
+        self._setup_layer_shell()
+
         self.set_default_size(360, 720)
         self.set_title("Niri AI Sidebar")
         self.set_hide_on_close(False)
@@ -33,7 +37,6 @@ class SidebarWindow(Gtk.ApplicationWindow):
         self._ollama_client = OllamaClient()
         self._current_model = self._ollama_client.default_model
 
-        self._setup_layer_shell()
         self._build_ui()
         self._populate_initial_messages()
 
@@ -44,6 +47,11 @@ class SidebarWindow(Gtk.ApplicationWindow):
             return
 
         Gtk4LayerShell.init_for_window(self)
+
+        # Verify initialization succeeded before configuring layer shell properties
+        if not Gtk4LayerShell.is_layer_window(self):
+            return
+
         Gtk4LayerShell.set_namespace(self, "niri-ai-sidebar")
         Gtk4LayerShell.set_layer(self, Gtk4LayerShell.Layer.TOP)
         Gtk4LayerShell.set_anchor(self, Gtk4LayerShell.Edge.LEFT, True)
@@ -99,6 +107,12 @@ class SidebarWindow(Gtk.ApplicationWindow):
         self._entry.set_placeholder_text("Ask a question…")
         self._entry.connect("activate", self._on_submit)
 
+        # Add focus event controller to properly handle focus-out events
+        # The handler must return False to propagate the event to GTK's default handler
+        focus_controller = Gtk.EventControllerFocus()
+        focus_controller.connect("leave", lambda c: False)
+        self._entry.add_controller(focus_controller)
+
         self._send_button = Gtk.Button(label="Send")
         self._send_button.connect("clicked", self._on_submit)