TUI refactor

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

pkg/tui/views/chat/chat.go

@@ -4,6 +4,7 @@ import (
 	"time"
 
 	"git.mlow.ca/mlow/lmcli/pkg/api"
+	"git.mlow.ca/mlow/lmcli/pkg/tui/model"
 	"git.mlow.ca/mlow/lmcli/pkg/tui/shared"
 	"github.com/charmbracelet/bubbles/cursor"
 	"github.com/charmbracelet/bubbles/spinner"
@@ -76,11 +77,11 @@ type Model struct {
 	shared.Shared
 	shared.Sections
 
-	// app state
+	// App state
+	App		*model.AppModel
+
+	// Chat view state
 	state           state // current overall status of the view
-	conversation    *api.Conversation
-	rootMessages    []api.Message
-	messages        []api.Message
 	selectedMessage int
 	editorTarget    editorTarget
 	stopSignal      chan struct{}
@@ -88,7 +89,7 @@ type Model struct {
 	chatReplyChunks chan api.Chunk
 	persistence     bool // whether we will save new messages in the conversation
 
-	// ui state
+	// UI state
 	focus           focusState
 	wrap            bool     // whether message content is wrapped to viewport width
 	showToolResults bool     // whether tool calls and results are shown
@@ -107,12 +108,12 @@ type Model struct {
 	elapsed    time.Duration
 }
 
-func Chat(shared shared.Shared) Model {
+func Chat(app *model.AppModel, shared shared.Shared) Model {
 	m := Model{
+		App: app,
 		Shared: shared,
 
 		state:        idle,
-		conversation: &api.Conversation{},
 		persistence:  true,
 
 		stopSignal:      make(chan struct{}),
@@ -143,15 +144,15 @@ func Chat(shared shared.Shared) Model {
 	m.replyCursor.SetChar(" ")
 	m.replyCursor.Focus()
 
-	system := shared.Ctx.DefaultSystemPrompt()
+	system := app.Ctx.DefaultSystemPrompt()
 
-	agent := shared.Ctx.GetAgent(shared.Ctx.Config.Defaults.Agent)
+	agent := app.Ctx.GetAgent(app.Ctx.Config.Defaults.Agent)
 	if agent != nil && agent.SystemPrompt != "" {
 		system = agent.SystemPrompt
 	}
 
 	if system != "" {
-		m.messages = api.ApplySystemPrompt(m.messages, system, false)
+		m.App.Messages = api.ApplySystemPrompt(m.App.Messages, system, false)
 	}
 
 	m.input.Focus()