Correct or almost correct model

main.go

@@ -7,40 +7,54 @@ import (
 	tea "github.com/charmbracelet/bubbletea"
 )
 
-type commandChoice struct {
+const (
+	BrowserSessions int = iota // Enumerating the sections
+	Commands
+)
+
+type sessionOrCommand struct {
 	displayString string
 	commandString string
 }
 
+type Choices [][]sessionOrCommand
+
 type model struct {
-	browserSessionsCursor int
-	commandsCursor        int
-	browserSessions       []string
-	commands              []commandChoice
-	selectedSessions      map[int]struct{}
-	selectedCommands      map[int]struct{}
+	activeSection int
+	cursor        []int
+	choices       Choices
+	selected      []map[int]struct{}
 }
 
-func getBrowserSessions() []string {
+func getBrowserSessions() []sessionOrCommand {
 	// Placeholder
-	return []string{"primary", "breakfast"}
+	return []sessionOrCommand{{
+		displayString: "primary",
+		commandString: "",
+	}, {
+		displayString: "breakfast",
+		commandString: "",
+	}}
 }
 
 func initialModel() model {
 	return model{
-		browserSessions: getBrowserSessions(),
-		commands: []commandChoice{{
+		activeSection: BrowserSessions,
+		// Need syntax of two-dimensional slices
+		choices: Choices{
+			getBrowserSessions(),
+			[]sessionOrCommand{{
 				displayString: "neomutt",
 				commandString: "neomutt",
 			}, {
 				displayString: "bottom",
 				commandString: "btm --group --battery --color gruvbox-light",
 			}},
-		// A map which indicates which choices are selected. We're using
-		// the  map like a mathematical set. The keys refer to the indexes
-		// of the `choices` slice, above.
-		selectedSessions: make(map[int]struct{}),
-		selectedCommands: make(map[int]struct{}),
+		},
+		// An array maps which indicates which choices are selected. We're
+		// using the map like a mathematical set. The keys refer to the
+		// indexes of the `choices` slice, above.
+		selected: make([]map[int]struct{}, 32, 32),
 	}
 }
 
@@ -55,17 +69,17 @@ func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 		case "ctrl+c", "q":
 			return m, tea.Quit
 		case "up", "k":
-			if m.cursor > 0 {
-				m.cursor--
+			if m.cursor[m.activeSection] > 0 {
+				m.cursor[m.activeSection]--
 			}
 		case "down", "j":
-			if m.cursor < len(m.browserSessions)+len(m.commands)-1 {
-				m.cursor++
+			if m.cursor[m.activeSection] < len(m.browserSessions)+len(m.commands)-1 {
+				m.cursor[m.activeSection]++
 			}
 		case "enter", " ":
 			// TODO: Let's have two separate cursors, and have tab move the active
 			// set from brower sessions to terminals.
-			if m.cursor < len(m.browserSessions)-1 {
+			if m.cursor[m.activeSection] < len(m.browserSessions)-1 {
 				_, ok := m.selected[m.cursor]
 				if ok {
 					delete(m.selected, m.cursor)