Large refactor - it compiles!

This refactor splits out all conversation concerns into a new
`conversation` package. There is now a split between `conversation` and
`api`s representation of `Message`, the latter storing the minimum
information required for interaction with LLM providers. There is
necessary conversation between the two when making LLM calls.

pkg/tui/views/chat/chat.go

@@ -4,7 +4,8 @@ import (
 	"time"
 
 	"git.mlow.ca/mlow/lmcli/pkg/api"
-	"git.mlow.ca/mlow/lmcli/pkg/api/provider"
+	"git.mlow.ca/mlow/lmcli/pkg/provider"
+	"git.mlow.ca/mlow/lmcli/pkg/conversation"
 	"git.mlow.ca/mlow/lmcli/pkg/tui/model"
 	"github.com/charmbracelet/bubbles/cursor"
 	"github.com/charmbracelet/bubbles/spinner"
@@ -20,14 +21,12 @@ type (
 	msgConversationTitleGenerated string
 	// sent when the conversation has been persisted, triggers a reload of contents
 	msgConversationPersisted struct {
-		isNew        bool
-		conversation *api.Conversation
-		messages     []api.Message
+		conversation *conversation.Conversation
+		messages     []conversation.Message
 	}
 	// sent when a conversation's messages are laoded
 	msgConversationMessagesLoaded struct {
-		messages     []api.Message
-		rootMessages []api.Message
+		messages     []conversation.Message
 	}
 	// a special case of common.MsgError that stops the response waiting animation
 	msgChatResponseError struct {
@@ -36,19 +35,19 @@ type (
 	// sent on each chunk received from LLM
 	msgChatResponseChunk provider.Chunk
 	// sent on each completed reply
-	msgChatResponse *api.Message
+	msgChatResponse *conversation.Message
 	// sent when the response is canceled
 	msgChatResponseCanceled struct{}
 	// sent when results from a tool call are returned
 	msgToolResults []api.ToolResult
 	// sent when the given message is made the new selected reply of its parent
-	msgSelectedReplyCycled *api.Message
+	msgSelectedReplyCycled *conversation.Message
 	// sent when the given message is made the new selected root of the current conversation
-	msgSelectedRootCycled *api.Message
+	msgSelectedRootCycled *conversation.Message
 	// sent when a message's contents are updated and saved
-	msgMessageUpdated *api.Message
+	msgMessageUpdated *conversation.Message
 	// sent when a message is cloned, with the cloned message
-	msgMessageCloned *api.Message
+	msgMessageCloned *conversation.Message
 )
 
 type focusState int
@@ -84,7 +83,7 @@ type Model struct {
 	selectedMessage int
 	editorTarget    editorTarget
 	stopSignal      chan struct{}
-	replyChan       chan api.Message
+	replyChan       chan conversation.Message
 	chatReplyChunks chan provider.Chunk
 	persistence     bool // whether we will save new messages in the conversation
 
@@ -137,7 +136,7 @@ func Chat(app *model.AppModel) *Model {
 		persistence: true,
 
 		stopSignal:      make(chan struct{}),
-		replyChan:       make(chan api.Message),
+		replyChan:       make(chan conversation.Message),
 		chatReplyChunks: make(chan provider.Chunk),
 
 		wrap:            true,