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.

inspiration/quickcenter/widgets/notificationcenter.py

@@ -0,0 +1,98 @@
+from ignis import widgets, utils
+from ignis.services.notifications import Notification, NotificationService
+from ignis.window_manager import WindowManager
+from gi.repository import GLib, Gtk
+from ...notifications import ExoNotification
+
+notifications = NotificationService.get_default()
+window_manager = WindowManager.get_default()
+
+class Popup(widgets.Revealer):
+    def __init__(self, notification: Notification, **kwargs):
+        widget = ExoNotification(notification)
+        super().__init__(child=widget, transition_type="slide_down", **kwargs)
+
+        notification.connect("closed", lambda x: self.destroy())
+
+    def destroy(self):
+        self.reveal_child = False
+        utils.Timeout(self.transition_duration, self.unparent)
+
+
+class Notifications(widgets.Box):
+    def __init__(self):
+        loading_notifications_label = widgets.Label(
+            label="Loading notifications...",
+            valign="center",
+            vexpand=True,
+            css_classes=["notification-center-info-label"],
+        )
+
+        super().__init__(
+            vertical=True,
+            child=[loading_notifications_label],
+            vexpand=True,
+            css_classes=["notification-center-content"],
+            spacing=2,
+            setup=lambda self: notifications.connect(
+                "notified",
+                lambda x, notification: self.__on_notified(notification),
+            ),
+        )
+
+        utils.ThreadTask(
+            self.__load_notifications,
+            lambda result: self.set_child(result),
+        ).run()
+
+    def __on_notified(self, notification: Notification) -> None:
+        notify = Popup(notification)
+        self.prepend(notify)
+        notify.reveal_child = True
+
+    def __load_notifications(self) -> list[widgets.Label | Popup]:
+        contents: list[widgets.Label | Popup] = []
+        for i in reversed(notifications.notifications):
+            GLib.idle_add(lambda i=i: contents.append(Popup(i, reveal_child=True)))
+
+        contents.append(
+            widgets.Label(
+                label="notifications_off",
+                valign="end",
+                vexpand=True,
+                css_classes=["notification-center-info-icon"],
+                visible=notifications.bind(
+                    "notifications", lambda value: len(value) == 0
+                ),
+            )
+        )
+        contents.append(
+            widgets.Label(
+                label="No notifications",
+                valign="start",
+                vexpand=True,
+                css_classes=["notification-center-info-label"],
+                visible=notifications.bind(
+                    "notifications", lambda value: len(value) == 0
+                ),
+            )
+        )
+        return contents
+
+
+class NotificationCenter(widgets.Box):
+    __gtype_name__ = "NotificationCenter"
+
+    def __init__(self):
+        scroll = widgets.Scroll(child=Notifications(), vexpand=True)
+        scroll.set_overflow(Gtk.Overflow.HIDDEN)
+
+        super().__init__(
+            vertical=True,
+            vexpand=True,
+            css_classes=["notification-center"],
+            spacing=10,
+            child=[
+                scroll,
+            ],
+        )