Added code for backend glue

backend/internal/http/router.go

@@ -0,0 +1,39 @@
+package http
+
+import (
+	"encoding/json"
+	"net/http"
+
+	"mind/internal/config"
+	"mind/internal/glue"
+	"mind/internal/logx"
+)
+
+type server struct {
+	log  *logx.Logger
+	cfg  config.Config
+	glue *glue.Glue
+}
+
+func NewRouter(l *logx.Logger, c config.Config, g *glue.Glue) http.Handler {
+	s := &server{log: l, cfg: c, glue: g}
+	mux := http.NewServeMux()
+	mux.HandleFunc("/healthz", s.health)
+	mux.HandleFunc("/conversations", s.conversations)
+	mux.HandleFunc("/branches", s.branches)
+	mux.HandleFunc("/completion", s.completion)
+	mux.HandleFunc("/linearize", s.linearize)
+	return withCommon(mux)
+}
+
+func (s *server) health(w http.ResponseWriter, r *http.Request) {
+	w.WriteHeader(200)
+	_, _ = w.Write([]byte("ok"))
+}
+
+// Helpers
+func writeJSON(w http.ResponseWriter, code int, v any) {
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(code)
+	_ = json.NewEncoder(w).Encode(v)
+}