Added code for backend glue

backend/internal/glue/conversations.go

@@ -0,0 +1,19 @@
+package glue
+
+import (
+	"context"
+	"mind/internal/db"
+	"mind/internal/models"
+)
+
+type Glue struct { repo *db.Repo }
+
+func NewGlue(r *db.Repo) *Glue { return &Glue{repo: r} }
+
+func (g *Glue) CreateConversation(ctx context.Context, ownerID int64, title string) (int64, error) {
+	return g.repo.CreateConversation(ctx, ownerID, title)
+}
+
+func (g *Glue) ListConversations(ctx context.Context, ownerID int64) ([]models.Conversation, error) {
+	return g.repo.ListConversations(ctx, ownerID)
+}