add handling for offseting fsTree start

fstree.go

@@ -62,6 +62,7 @@ type FsTree struct {
 	viewStart    int
 	viewEnd      int
 	oldSelected  *FsNode
+	startOffset  int
 }
 
 // ==================== Bubble Tea Interface Implementation ====================
@@ -106,7 +107,7 @@ func (t *FsTree) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 		}
 
 	case tea.MouseMsg:
-		m.Y += t.viewStart // adjust for viewport
+		m.Y += t.viewStart - t.startOffset // adjust for viewport
 		if m.X >= t.width {
 			break
 		}
@@ -184,7 +185,7 @@ func (t *FsTree) View() string {
 
 // ==================== FsTree helper methods ====================
 
-func NewFsTree(rootPath string) *FsTree {
+func NewFsTree(rootPath string, startOffset int) *FsTree {
 	root := &FsNode{
 		nodeType: FolderNode,
 		path:     rootPath,
@@ -194,7 +195,8 @@ func NewFsTree(rootPath string) *FsTree {
 	walkFileSystemAndBuildTree(rootPath, root)
 
 	tree := &FsTree{
-		root: root,
+		root:        root,
+		startOffset: startOffset,
 	}
 	if len(root.children) > 0 {
 		tree.selectedNode = root.children[0]

layout.go

@@ -2,10 +2,11 @@ package main
 
 // layout constants
 const (
-	minFsTreeWidth   = 5
-	minNoteViewWidth = 10
-	dividerWidth     = 1
-	dragHitArea      = 2 // +/- chars around divider
+	minFsTreeWidth    = 5
+	minNoteViewWidth  = 10
+	dividerWidth      = 1
+	dragHitArea       = 2 // +/- chars around divider
+	fsTreeStartOffset = 1
 )
 
 // calculateLayout computes the widths for the file tree and note view

main.go

@@ -73,14 +73,14 @@ func (m *model) loadTreeCmd(path string) tea.Cmd {
 		} else {
 			targetPath = path
 		}
-		return treeLoadedMsg{tree: NewFsTree(targetPath)}
+		return treeLoadedMsg{tree: NewFsTree(targetPath, fsTreeStartOffset)}
 	}
 }
 
 func (m *model) layout(width, height int) {
 	m.terminalWidth = width
 	m.terminalHeight = height
-	
+
 	m.fsTreeWidth, m.noteViewWidth = calculateLayout(width, m.fsTreeWidth)
 }
 
@@ -134,7 +134,7 @@ func (m *model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 		case "q", "ctrl+c":
 			return m, tea.Quit
 		}
-		
+
 		var cmds []tea.Cmd
 
 		// Forward keyboard input to tree
@@ -206,6 +206,7 @@ func (m model) View() string {
 		Height(m.terminalHeight).
 		Width(m.fsTreeWidth).
 		Align(lipgloss.Left).
+		PaddingTop(fsTreeStartOffset).
 		PaddingRight(1).
 		Render(tree)