TUI refactor

- Clean up, improved startup logic, initial conversation load
- Moved converation/message business logic (mostly) into `model/tui`

pkg/tui/views/chat/update.go

@@ -15,7 +15,7 @@ func (m *Model) HandleResize(width, height int) {
 	m.Width, m.Height = width, height
 	m.content.Width = width
 	m.input.SetWidth(width - m.input.FocusedStyle.Base.GetHorizontalFrameSize())
-	if len(m.messages) > 0 {
+	if len(m.App.Messages) > 0 {
 		m.rebuildMessageCache()
 		m.updateContent()
 	}
@@ -36,26 +36,21 @@ func (m Model) Update(msg tea.Msg) (Model, tea.Cmd) {
 		// wake up spinners and cursors
 		cmds = append(cmds, cursor.Blink, m.spinner.Tick)
 
-		if m.Shared.Values.ConvShortname != "" {
-			// (re)load conversation contents
-			cmds = append(cmds, m.loadConversation(m.Shared.Values.ConvShortname))
-
-			if m.conversation.ShortName.String != m.Shared.Values.ConvShortname {
-				// clear existing messages if we're loading a new conversation
-				m.messages = []api.Message{}
-				m.selectedMessage = 0
-			}
-		}
-
+		// Refresh view
 		m.rebuildMessageCache()
 		m.updateContent()
+
+		if m.App.Conversation != nil && m.App.Conversation.ID > 0 {
+			// (re)load conversation contents
+			cmds = append(cmds, m.loadConversationMessages())
+		}
 	case tuiutil.MsgTempfileEditorClosed:
 		contents := string(msg)
 		switch m.editorTarget {
 		case input:
 			m.input.SetValue(contents)
 		case selectedMessage:
-			toEdit := m.messages[m.selectedMessage]
+			toEdit := m.App.Messages[m.selectedMessage]
 			if toEdit.Content != contents {
 				toEdit.Content = contents
 				m.setMessage(m.selectedMessage, toEdit)
@@ -66,18 +61,18 @@ func (m Model) Update(msg tea.Msg) (Model, tea.Cmd) {
 			}
 		}
 	case msgConversationLoaded:
-		m.conversation = msg.conversation
-		m.rootMessages = msg.rootMessages
+		m.App.Conversation = msg.conversation
+		m.App.RootMessages = msg.rootMessages
 		m.selectedMessage = -1
-		if len(m.rootMessages) > 0 {
+		if len(m.App.RootMessages) > 0 {
 			cmds = append(cmds, m.loadConversationMessages())
 		}
 	case msgMessagesLoaded:
-		m.messages = msg
+		m.App.Messages = msg
 		if m.selectedMessage == -1 {
 			m.selectedMessage = len(msg) - 1
 		} else {
-			m.selectedMessage = min(m.selectedMessage, len(m.messages))
+			m.selectedMessage = min(m.selectedMessage, len(m.App.Messages))
 		}
 		m.rebuildMessageCache()
 		m.updateContent()
@@ -88,10 +83,10 @@ func (m Model) Update(msg tea.Msg) (Model, tea.Cmd) {
 			break
 		}
 
-		last := len(m.messages) - 1
-		if last >= 0 && m.messages[last].Role.IsAssistant() {
+		last := len(m.App.Messages) - 1
+		if last >= 0 && m.App.Messages[last].Role.IsAssistant() {
 			// append chunk to existing message
-			m.setMessageContents(last, m.messages[last].Content+msg.Content)
+			m.setMessageContents(last, m.App.Messages[last].Content+msg.Content)
 		} else {
 			// use chunk in a new message
 			m.addMessage(api.Message{
@@ -113,12 +108,12 @@ func (m Model) Update(msg tea.Msg) (Model, tea.Cmd) {
 		reply := (*api.Message)(msg)
 		reply.Content = strings.TrimSpace(reply.Content)
 
-		last := len(m.messages) - 1
+		last := len(m.App.Messages) - 1
 		if last < 0 {
 			panic("Unexpected empty messages handling msgAssistantReply")
 		}
 
-		if m.messages[last].Role.IsAssistant() {
+		if m.App.Messages[last].Role.IsAssistant() {
 			// TODO: handle continuations gracefully - some models support them well, others fail horribly.
 			m.setMessage(last, *reply)
 		} else {
@@ -136,7 +131,7 @@ func (m Model) Update(msg tea.Msg) (Model, tea.Cmd) {
 			cmds = append(cmds, m.persistConversation())
 		}
 
-		if m.conversation.Title == "" {
+		if m.App.Conversation.Title == "" {
 			cmds = append(cmds, m.generateConversationTitle())
 		}
 
@@ -149,12 +144,12 @@ func (m Model) Update(msg tea.Msg) (Model, tea.Cmd) {
 		m.Shared.Err = error(msg)
 		m.updateContent()
 	case msgToolResults:
-		last := len(m.messages) - 1
+		last := len(m.App.Messages) - 1
 		if last < 0 {
 			panic("Unexpected empty messages handling msgAssistantReply")
 		}
 
-		if m.messages[last].Role != api.MessageRoleToolCall {
+		if m.App.Messages[last].Role != api.MessageRoleToolCall {
 			panic("Previous message not a tool call, unexpected")
 		}
 
@@ -170,29 +165,29 @@ func (m Model) Update(msg tea.Msg) (Model, tea.Cmd) {
 		m.updateContent()
 	case msgConversationTitleGenerated:
 		title := string(msg)
-		m.conversation.Title = title
+		m.App.Conversation.Title = title
 		if m.persistence {
-			cmds = append(cmds, m.updateConversationTitle(m.conversation))
+			cmds = append(cmds, m.updateConversationTitle(m.App.Conversation))
 		}
 	case cursor.BlinkMsg:
 		if m.state == pendingResponse {
 			// ensure we show the updated "wait for response" cursor blink state
-			last := len(m.messages)-1
+			last := len(m.App.Messages) - 1
 			m.messageCache[last] = m.renderMessage(last)
 			m.updateContent()
 		}
 	case msgConversationPersisted:
-		m.conversation = msg.conversation
-		m.messages = msg.messages
+		m.App.Conversation = msg.conversation
+		m.App.Messages = msg.messages
 		if msg.isNew {
-			m.rootMessages = []api.Message{m.messages[0]}
+			m.App.RootMessages = []api.Message{m.App.Messages[0]}
 		}
 		m.rebuildMessageCache()
 		m.updateContent()
 	case msgMessageCloned:
 		if msg.Parent == nil {
-			m.conversation = msg.Conversation
-			m.rootMessages = append(m.rootMessages, *msg)
+			m.App.Conversation = msg.Conversation
+			m.App.RootMessages = append(m.App.RootMessages, *msg)
 		}
 		cmds = append(cmds, m.loadConversationMessages())
 	case msgSelectedRootCycled, msgSelectedReplyCycled, msgMessageUpdated: