Add message branching

Updated the behaviour of commands:

- `lmcli edit`
  - by default create a new branch/message branch with the edited contents
  - add --in-place to avoid creating a branch
  - no longer delete messages after the edited message
  - only do the edit, don't fetch a new response
- `lmcli retry`
  - create a new branch rather than replacing old messages
  - add --offset to change where to retry from

pkg/cmd/list.go

@@ -2,7 +2,6 @@ package cmd
 
 import (
 	"fmt"
-	"slices"
 	"time"
 
 	"git.mlow.ca/mlow/lmcli/pkg/lmcli"
@@ -21,7 +20,7 @@ func ListCmd(ctx *lmcli.Context) *cobra.Command {
 		Short:   "List conversations",
 		Long:    `List conversations in order of recent activity`,
 		RunE: func(cmd *cobra.Command, args []string) error {
-			conversations, err := ctx.Store.Conversations()
+			messages, err := ctx.Store.LatestConversationMessages()
 			if err != nil {
 				return fmt.Errorf("Could not fetch conversations: %v", err)
 			}
@@ -58,13 +57,8 @@ func ListCmd(ctx *lmcli.Context) *cobra.Command {
 
 			all, _ := cmd.Flags().GetBool("all")
 
-			for _, conversation := range conversations {
-				lastMessage, err := ctx.Store.LastMessage(&conversation)
-				if lastMessage == nil || err != nil {
-					continue
-				}
-
-				messageAge := now.Sub(lastMessage.CreatedAt)
+			for _, message := range messages {
+				messageAge := now.Sub(message.CreatedAt)
 
 				var category string
 				for _, c := range categories {
@@ -76,9 +70,9 @@ func ListCmd(ctx *lmcli.Context) *cobra.Command {
 
 				formatted := fmt.Sprintf(
 					"%s - %s - %s",
-					conversation.ShortName.String,
+					message.Conversation.ShortName.String,
 					util.HumanTimeElapsedSince(messageAge),
-					conversation.Title,
+					message.Conversation.Title,
 				)
 
 				categorized[category] = append(
@@ -96,14 +90,10 @@ func ListCmd(ctx *lmcli.Context) *cobra.Command {
 					continue
 				}
 
-				slices.SortFunc(conversationLines, func(a, b ConversationLine) int {
-					return int(a.timeSinceReply - b.timeSinceReply)
-				})
-
 				fmt.Printf("%s:\n", category.name)
 				for _, conv := range conversationLines {
 					if conversationsPrinted >= count && !all {
-						fmt.Printf("%d remaining message(s), use --all to view.\n", len(conversations)-conversationsPrinted)
+						fmt.Printf("%d remaining conversation(s), use --all to view.\n", len(messages)-conversationsPrinted)
 						break outer
 					}