feat(GODT-2759): Add prompt to download missing messages for analysis

This will download the missing messages into a temporary directory and
decrypt them along with the metadata so we can attempt analyze them once
submitted to see what is going wrong.

internal/frontend/cli/debug.go

@@ -19,6 +19,7 @@ package cli
 
 import (
 	"context"
+	"os"
 
 	"github.com/abiosoft/ishell"
 )
@@ -31,12 +32,43 @@ func (f *frontendCLI) debugMailboxState(c *ishell.Context) {
 
 	c.Println("Starting state check. Note that depending on your message count this may take a while.")
 
-	if err := f.bridge.CheckClientState(context.Background(), checkFlags, func(s string) {
+	result, err := f.bridge.CheckClientState(context.Background(), checkFlags, func(s string) {
 		c.Println(s)
-	}); err != nil {
+	})
+	if err != nil {
 		c.Printf("State check failed : %v", err)
 		return
 	}
 
 	c.Println("State check finished, see log for more details.")
+
+	if len(result.MissingMessages) == 0 {
+		return
+	}
+
+	f.Println("\n\nSome missing messages were detected. Bridge can download these messages for you")
+	f.Println("in a directory which you can later send to the developers for analysis.\n")
+	f.Println(bold("Note that the Messages will be stored unencrypted on disk.") + " If you do not wish")
+	f.Println("to continue, input no in the prompt below.\n")
+
+	if !f.yesNoQuestion("Would you like to proceed") {
+		return
+	}
+
+	location, err := os.MkdirTemp("", "debug-state-check-*")
+	if err != nil {
+		f.Printf("Failed to create temporary directory: %v\n", err)
+		return
+	}
+
+	c.Printf("Messages will be downloaded to: %v\n\n", bold(location))
+
+	if err := f.bridge.DebugDownloadFailedMessages(context.Background(), result, location, func(s string, i int, i2 int) {
+		f.Printf("[%v] Retrieving message %v of %v\n", s, i, i2)
+	}); err != nil {
+		f.Println(err)
+		return
+	}
+
+	c.Printf("\nMessage download finished. Data is available at %v\n", bold(location))
 }