feat: add view mode status bar

internal/tui/model.go

@@ -1,6 +1,7 @@
 package tui
 
 import (
+	"fmt"
 	"hosts-go/internal/core"
 
 	list "github.com/charmbracelet/bubbles/list"
@@ -10,16 +11,31 @@ import (
 // entryItem wraps a HostEntry for display in a list component.
 type entryItem struct{ entry *core.HostEntry }
 
-func (e entryItem) Title() string       { return e.entry.Hostname }
+func (e entryItem) Title() string {
+	prefix := "[ ]"
+	if e.entry.Active {
+		prefix = "[✓]"
+	}
+	return fmt.Sprintf("%s %s", prefix, e.entry.Hostname)
+}
+
 func (e entryItem) Description() string { return e.entry.IP }
 func (e entryItem) FilterValue() string { return e.entry.Hostname }
 
 // Model is the main Bubble Tea model for the application.
+type Mode int
+
+const (
+	ViewMode Mode = iota
+	EditMode
+)
+
 type Model struct {
 	list   list.Model
 	hosts  *core.HostsFile
 	width  int
 	height int
+	mode   Mode
 }
 
 // NewModel constructs the TUI model from a parsed HostsFile.
@@ -38,6 +54,7 @@ func NewModel(hf *core.HostsFile) Model {
 	return Model{
 		list:  l,
 		hosts: hf,
+		mode:  ViewMode,
 	}
 }