More monior TUI refactor/cleanup

`tui/tui.go` is no longer responsible for passing window resize updates
to all views, instead we request a new window size message to be sent at
the same time we enter the view, allowing the view to catch and handle
it.

Add `Initialized` to `tui/shared/View` model, now we only call
`Init` on a view before entering it for the first time, rather than
calling `Init` on all views when the application starts.

Renames file, small cleanups

pkg/tui/model/model.go

@@ -16,7 +16,6 @@ type LoadedConversation struct {
 	LastReply api.Message
 }
 
-// AppModel represents the application data model
 type AppModel struct {
 	Ctx           *lmcli.Context
 	Conversations []LoadedConversation
@@ -193,7 +192,6 @@ func (a *AppModel) PromptLLM(messages []api.Message, chatReplyChunks chan api.Ch
 	)
 }
 
-// Helper function
 func cycleSelectedMessage(selected *api.Message, choices []api.Message, dir MessageCycleDirection) (*api.Message, error) {
 	currentIndex := -1
 	for i, reply := range choices {

pkg/tui/shared/shared.go

@@ -5,6 +5,7 @@ import (
 )
 
 type Shared struct {
+	Initialized bool
 	Width  int
 	Height int
 	Err    error
@@ -29,6 +30,12 @@ type (
 	MsgError error
 )
 
+func ViewEnter() tea.Cmd {
+	return func() tea.Msg {
+		return MsgViewEnter{}
+	}
+}
+
 func WrapError(err error) tea.Cmd {
 	return func() tea.Msg {
 		return MsgError(err)

pkg/tui/tui.go

@@ -26,10 +26,10 @@ type LaunchOptions struct {
 type Model struct {
 	App  *model.AppModel
 	view shared.View
+
+	// views
 	chat          chat.Model
 	conversations conversations.Model
-	Width         int
-	Height        int
 }
 
 func initialModel(ctx *lmcli.Context, opts LaunchOptions) Model {
@@ -50,8 +50,6 @@ func initialModel(ctx *lmcli.Context, opts LaunchOptions) Model {
 
 func (m Model) Init() tea.Cmd {
 	return tea.Batch(
-		m.conversations.Init(),
-		m.chat.Init(),
 		func() tea.Msg {
 			return shared.MsgViewChange(m.view)
 		},
@@ -96,15 +94,23 @@ func (m Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 		}
 	case shared.MsgViewChange:
 		m.view = shared.View(msg)
+
+		var cmds []tea.Cmd
 		switch m.view {
-		case shared.StateChat:
-			m.chat.HandleResize(m.Width, m.Height)
 		case shared.StateConversations:
-			m.conversations.HandleResize(m.Width, m.Height)
+			if !m.conversations.Initialized {
+				cmds = append(cmds, m.conversations.Init())
+				m.conversations.Initialized = true
 			}
-		return m, func() tea.Msg { return shared.MsgViewEnter(struct{}{}) }
+		case shared.StateChat:
-	case tea.WindowSizeMsg:
+			if !m.chat.Initialized {
-		m.Width, m.Height = msg.Width, msg.Height
+				cmds = append(cmds, m.chat.Init())
+				m.chat.Initialized = true
+			}
+		}
+		cmds = append(cmds, tea.WindowSize(), shared.ViewEnter())
+
+		return m, tea.Batch(cmds...)
 	}
 
 	var cmd tea.Cmd

pkg/tui/views/chat/cmds.go

@@ -9,39 +9,9 @@ import (
 	tea "github.com/charmbracelet/bubbletea"
 )
 
-func (m *Model) setMessage(i int, msg api.Message) {
+func (m *Model) waitForResponseChunk() tea.Cmd {
-	if i >= len(m.App.Messages) {
+	return func() tea.Msg {
-		panic("i out of range")
+		return msgChatResponseChunk(<-m.chatReplyChunks)
-	}
-	m.App.Messages[i] = msg
-	m.messageCache[i] = m.renderMessage(i)
-}
-
-func (m *Model) addMessage(msg api.Message) {
-	m.App.Messages = append(m.App.Messages, msg)
-	m.messageCache = append(m.messageCache, m.renderMessage(len(m.App.Messages)-1))
-}
-
-func (m *Model) setMessageContents(i int, content string) {
-	if i >= len(m.App.Messages) {
-		panic("i out of range")
-	}
-	m.App.Messages[i].Content = content
-	m.messageCache[i] = m.renderMessage(i)
-}
-
-func (m *Model) rebuildMessageCache() {
-	m.messageCache = make([]string, len(m.App.Messages))
-	for i := range m.App.Messages {
-		m.messageCache[i] = m.renderMessage(i)
-	}
-}
-
-func (m *Model) updateContent() {
-	atBottom := m.content.AtBottom()
-	m.content.SetContent(m.conversationMessagesView())
-	if atBottom {
-		m.content.GotoBottom()
 	}
 }
 
@@ -97,6 +67,7 @@ func (m *Model) updateMessageContent(message *api.Message) tea.Cmd {
 
 func (m *Model) cycleSelectedRoot(conv *api.Conversation, dir model.MessageCycleDirection) tea.Cmd {
 	if len(m.App.RootMessages) < 2 {
+
 		return nil
 	}
 
@@ -153,11 +124,9 @@ func (m *Model) promptLLM() tea.Cmd {
 
 	return func() tea.Msg {
 		resp, err := m.App.PromptLLM(m.App.Messages, m.chatReplyChunks, m.stopSignal)
-
 		if err != nil {
 			return msgChatResponseError(err)
 		}
-
 		return msgChatResponse(resp)
 	}
 }

pkg/tui/views/chat/update.go

@@ -11,19 +11,39 @@ import (
 	tea "github.com/charmbracelet/bubbletea"
 )
 
-func (m *Model) HandleResize(width, height int) {
+func (m *Model) setMessage(i int, msg api.Message) {
-	m.Width, m.Height = width, height
+	if i >= len(m.App.Messages) {
-	m.content.Width = width
+		panic("i out of range")
-	m.input.SetWidth(width - m.input.FocusedStyle.Base.GetHorizontalFrameSize())
+	}
-	if len(m.App.Messages) > 0 {
+	m.App.Messages[i] = msg
-		m.rebuildMessageCache()
+	m.messageCache[i] = m.renderMessage(i)
-		m.updateContent()
+}
+
+func (m *Model) addMessage(msg api.Message) {
+	m.App.Messages = append(m.App.Messages, msg)
+	m.messageCache = append(m.messageCache, m.renderMessage(len(m.App.Messages)-1))
+}
+
+func (m *Model) setMessageContents(i int, content string) {
+	if i >= len(m.App.Messages) {
+		panic("i out of range")
+	}
+	m.App.Messages[i].Content = content
+	m.messageCache[i] = m.renderMessage(i)
+}
+
+func (m *Model) rebuildMessageCache() {
+	m.messageCache = make([]string, len(m.App.Messages))
+	for i := range m.App.Messages {
+		m.messageCache[i] = m.renderMessage(i)
 	}
 }
 
-func (m *Model) waitForResponseChunk() tea.Cmd {
+func (m *Model) updateContent() {
-	return func() tea.Msg {
+	atBottom := m.content.AtBottom()
-		return msgChatResponseChunk(<-m.chatReplyChunks)
+	m.content.SetContent(m.conversationMessagesView())
+	if atBottom {
+		m.content.GotoBottom()
 	}
 }
 
@@ -31,7 +51,13 @@ func (m Model) Update(msg tea.Msg) (Model, tea.Cmd) {
 	var cmds []tea.Cmd
 	switch msg := msg.(type) {
 	case tea.WindowSizeMsg:
-		m.HandleResize(msg.Width, msg.Height)
+		m.Width, m.Height = msg.Width, msg.Height
+		m.content.Width = msg.Width
+		m.input.SetWidth(msg.Width - m.input.FocusedStyle.Base.GetHorizontalFrameSize())
+		if len(m.App.Messages) > 0 {
+			m.rebuildMessageCache()
+			m.updateContent()
+		}
 	case shared.MsgViewEnter:
 		// wake up spinners and cursors
 		cmds = append(cmds, cursor.Blink, m.spinner.Tick)

pkg/tui/views/conversations/conversations.go

@@ -127,11 +127,6 @@ func (m Model) Init() tea.Cmd {
 	return m.loadConversations()
 }
 
-func (m *Model) HandleResize(width, height int) {
-	m.Width, m.Height = width, height
-	m.content.Width = width
-}
-
 func (m Model) Update(msg tea.Msg) (Model, tea.Cmd) {
 	var cmds []tea.Cmd
 	switch msg := msg.(type) {
@@ -139,7 +134,8 @@ func (m Model) Update(msg tea.Msg) (Model, tea.Cmd) {
 		cmds = append(cmds, m.loadConversations())
 		m.content.SetContent(m.renderConversationList())
 	case tea.WindowSizeMsg:
-		m.HandleResize(msg.Width, msg.Height)
+		m.Width, m.Height = msg.Width, msg.Height
+		m.content.Width = msg.Width
 		m.content.SetContent(m.renderConversationList())
 	case msgConversationsLoaded:
 		m.App.Conversations = msg