Move UI & make a root model.

Signed-off-by: Hadi <112569860+anotherhadi@users.noreply.github.com>

app.go

@@ -0,0 +1,55 @@
+package main
+
+import (
+	tea "charm.land/bubbletea/v2"
+	"github.com/anotherhadi/ilovetui/app"
+	"github.com/anotherhadi/ilovetui/modal"
+	"github.com/anotherhadi/ilovetui/notification"
+	"github.com/anotherhadi/usbguard-tui/ui"
+)
+
+type appModel struct {
+	core   ui.Model
+	modals modal.Model
+	notif  notification.Model
+}
+
+func newApp() appModel {
+	return appModel{
+		core:   ui.New(),
+		modals: modal.New(),
+		notif:  notification.New(),
+	}
+}
+
+func (a appModel) Init() tea.Cmd {
+	return tea.Batch(a.core.Init(), a.modals.Init(), a.notif.Init())
+}
+
+func (a appModel) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
+	if _, ok := msg.(app.QuitMsg); ok {
+		return a, tea.Quit
+	}
+
+	a.core.ModalOpen = a.modals.Open()
+	var coreCmd tea.Cmd
+	a.core, coreCmd = a.core.Update(msg)
+
+	var modalCmd, notifCmd tea.Cmd
+	a.modals, modalCmd = a.modals.Update(msg)
+	a.notif, notifCmd = a.notif.Update(msg)
+
+	return a, tea.Batch(coreCmd, modalCmd, notifCmd)
+}
+
+func (a appModel) View() tea.View {
+	bg := a.core.View()
+	bg = a.modals.Render(bg)
+	bg = a.notif.Render(bg)
+	return tea.View{
+		Content:     bg,
+		AltScreen:   true,
+		WindowTitle: "USBGuard TUI",
+		MouseMode:   tea.MouseModeCellMotion,
+	}
+}