fix(tui): forward all msg types to huh forms, improve row selection UX

Huh forms need all message types (timers, resize, etc.) not just
KeyMsg to function. Restructured Update to delegate all messages to
huh when in form state. Fixed selected row style to be visually
distinct from header (white text on darker bg). Moved click zone
from narrow ID cell to wider Name cell for better click targets.

internal/tui/tui.go

@@ -157,29 +157,6 @@ func (m Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 		}
 
 		switch m.state {
-		case stateFormSite, stateFormAlert, stateFormUser:
-			if msg.String() == "esc" {
-				m.huhForm = nil
-				m.state = stateDashboard
-				if m.currentTab == 3 {
-					m.state = stateUsers
-				}
-				return m, nil
-			}
-
-			if m.huhForm != nil {
-				form, formCmd := m.huhForm.Update(msg)
-				if f, ok := form.(*huh.Form); ok {
-					m.huhForm = f
-				}
-				if m.huhForm.State == huh.StateCompleted {
-					m.submitForm()
-					m.refreshData()
-					m.huhForm = nil
-				}
-				return m, formCmd
-			}
-
 		case stateDashboard, stateLogs, stateUsers:
 			switch msg.String() {
 			case "q":