init layout, notifications, tabs & more

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

layout/helpers_test.go

@@ -0,0 +1,49 @@
+package layout
+
+import (
+	"charm.land/bubbles/v2/key"
+	tea "charm.land/bubbletea/v2"
+)
+
+// stubPane is a minimal Pane used across the test suite: it records every
+// message it receives (and counts Focus/Blur specifically) and can be told
+// to return a fixed cmd on its next Update, so tests can assert on both
+// sides of the layout <-> pane contract without a real component.
+type stubPane struct {
+	focusN, blurN int
+	w, h          int
+	msgs          []tea.Msg
+	nextCmd       tea.Cmd
+	help          []key.Binding
+}
+
+func newStub() *stubPane { return &stubPane{} }
+
+func (p *stubPane) Init() tea.Cmd { return nil }
+
+func (p *stubPane) Update(msg tea.Msg) (Pane, tea.Cmd) {
+	p.msgs = append(p.msgs, msg)
+	switch m := msg.(type) {
+	case FocusMsg:
+		p.focusN++
+	case BlurMsg:
+		p.blurN++
+	case SizeMsg:
+		p.w, p.h = m.Width, m.Height
+	}
+	cmd := p.nextCmd
+	p.nextCmd = nil
+	return p, cmd
+}
+
+func (p *stubPane) View() string { return "" }
+
+// HelpBindings implements HelpProvider.
+func (p *stubPane) HelpBindings() []key.Binding { return p.help }
+
+func (p *stubPane) last() tea.Msg {
+	if len(p.msgs) == 0 {
+		return nil
+	}
+	return p.msgs[len(p.msgs)-1]
+}