Initial, working but only with viewport height adjusted a little bit

ui/model.go

@@ -0,0 +1,57 @@
+package ui
+
+import (
+	"strings"
+
+	"git.pablu.de/pablu/pybug/internal/bridge"
+	"github.com/charmbracelet/bubbles/viewport"
+	tea "github.com/charmbracelet/bubbletea"
+)
+
+type Model struct {
+	currentFile string
+	cursor      int
+	text        string
+	width       int
+	height      int
+	lineCount   int
+	bridge      *bridge.Bridge
+
+	listenBridge chan string
+
+	messages []string
+	viewport viewport.Model
+
+	breakpoints map[string][]int
+}
+
+func NewModel(b *bridge.Bridge, file string, text string) Model {
+	c := b.Subscribe()
+
+	vp := viewport.New(0, 0)
+
+	return Model{
+		currentFile:  file,
+		text:         text,
+		cursor:       0,
+		lineCount:    len(strings.Split(text, "\n")),
+		bridge:       b,
+		breakpoints:  make(map[string][]int),
+		listenBridge: c,
+		messages:     make([]string, 0),
+		viewport:     vp,
+	}
+}
+
+func ListenBridge(ch <-chan string) tea.Cmd {
+	return func() tea.Msg {
+		msg := <-ch
+		return StdoutMsg(msg)
+	}
+}
+
+type StdoutMsg string
+
+func (m Model) Init() tea.Cmd {
+	return ListenBridge(m.listenBridge)
+}