fix: Properly parse compound handshake time and fix q key handling

- Fix parseHandshake to correctly parse number-unit pairs from '14 hours, 24 minutes, 40 seconds ago'
  Previous logic tried to parse unit words instead of finding associated numbers
  Now correctly accumulates all time units (hours, minutes, seconds)
- Fix q key handling to properly check screen type before quitting
  Only quit application when 'q' is pressed on list screen
  Other screens (detail, add, help) now handle 'q' to navigate back

Note: q key navigation may still need investigation for edge cases

cmd/wg-tui/main.go

@@ -47,11 +47,14 @@ func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 
 	switch msg := msg.(type) {
 	case tea.KeyMsg:
-		// Only quit on 'q' when on list screen
-		// Other screens handle 'q' to navigate back
-		if _, ok := m.currentScreen.(*screens.ListScreen); ok && (msg.String() == "q" || msg.String() == "ctrl+c") {
-			m.quitting = true
-			return m, tea.Quit
+		// Only quit on 'q' or ctrl+c when on list screen
+		// Other screens handle their own navigation keys
+		if msg.String() == "q" || msg.String() == "ctrl+c" {
+			if _, ok := m.currentScreen.(*screens.ListScreen); ok {
+				m.quitting = true
+				return m, tea.Quit
+			}
+			// For other screens, let them handle the key
 		}
 		switch msg.String() {
 		case "?":