Updated TUI field sizing

internal/tui/forms.go

@@ -63,10 +63,27 @@ type form struct {
 	cursor int
 	busy   bool
 	err    string
+	width  int // current terminal width; inputs resize to fill it
 
 	submit func(values []string) tea.Cmd
 }
 
+// defaultFieldWidth is the fallback input width used before the first
+// WindowSizeMsg has arrived. Once we know the terminal size, inputs
+// grow to fill the available horizontal space.
+const defaultFieldWidth = 40
+
+// fieldWidthFor derives the per-input visible width from the terminal
+// width. It subtracts the modal's border+padding (6) and the form's
+// label indent (2), then a couple of chars of safety margin.
+func fieldWidthFor(termWidth int) int {
+	w := termWidth - 12
+	if w < defaultFieldWidth {
+		return defaultFieldWidth
+	}
+	return w
+}
+
 func newForm(title string, fields []formField, submit func([]string) tea.Cmd) *form {
 	for i := range fields {
 		fields[i].input.Prompt = ""
@@ -89,7 +106,7 @@ func textField(label, hint string, required bool) formField {
 // contents and can tweak instead of retyping everything.
 func textFieldWithValue(label, hint, value string, required bool) formField {
 	ti := textinput.New()
-	ti.Width = 40
+	ti.Width = defaultFieldWidth
 	ti.Placeholder = hint
 	if value != "" {
 		ti.SetValue(value)
@@ -106,7 +123,7 @@ func passwordField(label, hint string) formField {
 // the actual value leaking on-screen.
 func passwordFieldWithValue(label, hint, value string) formField {
 	ti := textinput.New()
-	ti.Width = 40
+	ti.Width = defaultFieldWidth
 	ti.Placeholder = hint
 	ti.EchoMode = textinput.EchoPassword
 	ti.EchoCharacter = '•'
@@ -148,6 +165,14 @@ func (f *form) View() string {
 
 func (f *form) Update(msg tea.Msg) (modal, tea.Cmd) {
 	switch msg := msg.(type) {
+	case tea.WindowSizeMsg:
+		f.width = msg.Width
+		w := fieldWidthFor(msg.Width)
+		for i := range f.fields {
+			f.fields[i].input.Width = w
+		}
+		return f, nil
+
 	case formSubmitErr:
 		f.busy = false
 		f.err = string(msg)

internal/tui/tui.go

@@ -132,6 +132,9 @@ func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 	case tea.WindowSizeMsg:
 		m.width, m.height = msg.Width, msg.Height
 		m.resizeTabs()
+		if m.modal != nil {
+			m.modal, _ = m.modal.Update(msg)
+		}
 		return m, nil
 
 	case tickMsg:
@@ -175,8 +178,15 @@ func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 
 	// Modal grabs all input while open.
 	if m.modal != nil {
+		prev := m.modal
 		newModal, cmd := m.modal.Update(msg)
 		m.modal = newModal
+		// If the modal handed off to a different modal (e.g. picker →
+		// form), seed the new one with the current terminal size so its
+		// text inputs can size themselves on first paint.
+		if newModal != nil && newModal != prev {
+			m.seedModalSize()
+		}
 		return m, cmd
 	}
 
@@ -223,6 +233,7 @@ func (m model) handleKey(km tea.KeyMsg) (tea.Model, tea.Cmd) {
 		return m, tea.Batch(loadStatusCmd(), loadConfigCmd())
 	case "a":
 		m.modal = m.openAddPicker()
+		m.seedModalSize()
 		return m, nil
 	case "d":
 		return m.openRemoveConfirm()
@@ -501,9 +512,20 @@ func (m model) openRemoveConfirm() (tea.Model, tea.Cmd) {
 		return m, nil
 	}
 	m.modal = newConfirm(prompt, run)
+	m.seedModalSize()
 	return m, nil
 }
 
+// seedModalSize forwards the current terminal dimensions to the modal
+// so its inputs can size themselves on first paint. Called whenever a
+// new modal is installed.
+func (m *model) seedModalSize() {
+	if m.modal == nil || m.width == 0 {
+		return
+	}
+	m.modal, _ = m.modal.Update(tea.WindowSizeMsg{Width: m.width, Height: m.height})
+}
+
 // openEditForm dispatches to the right pre-filled edit form based on the
 // active tab and the row under the cursor. Looks up the full record in
 // m.peersFull / m.checksFull / m.alerts (populated by loadConfigCmd) so
@@ -519,6 +541,7 @@ func (m model) openEditForm() (tea.Model, tea.Cmd) {
 		for i := range m.peersFull {
 			if m.peersFull[i].NodeID == id {
 				m.modal = newEditNodeForm(m.peersFull[i])
+				m.seedModalSize()
 				return m, nil
 			}
 		}
@@ -534,6 +557,7 @@ func (m model) openEditForm() (tea.Model, tea.Cmd) {
 		for i := range m.checksFull {
 			if m.checksFull[i].ID == id {
 				m.modal = newEditCheckForm(m.checksFull[i])
+				m.seedModalSize()
 				return m, nil
 			}
 		}
@@ -559,6 +583,7 @@ func (m model) openEditForm() (tea.Model, tea.Cmd) {
 				m.setFlash("unsupported alert type", flashError)
 				return m, nil
 			}
+			m.seedModalSize()
 			return m, nil
 		}
 		m.setFlash("alert not found in local cluster.yaml", flashError)