Simplify page view file loading to plain relative paths

internal/server/files.go

@@ -226,12 +226,16 @@ func serveFile(w http.ResponseWriter, root, rel string) {
 	writeJSON(w, http.StatusOK, fc)
 }
 
-func (s *Server) GetRaw(w http.ResponseWriter, r *http.Request, params api.GetRawParams) {
-	full := filepath.Clean(filepath.FromSlash(params.Path))
-	if !filepath.IsAbs(full) {
-		writeError(w, http.StatusBadRequest, errors.New("path must be absolute"))
+func (s *Server) GetTaskRaw(w http.ResponseWriter, r *http.Request, taskID string, params api.GetTaskRawParams) {
+	t, ok := s.activeTask(w, r, taskID)
+	if !ok {
 		return
 	}
+	if params.Path == "" {
+		writeError(w, http.StatusBadRequest, errors.New("path is required"))
+		return
+	}
+	name, full := taskPath(t.WorktreePath, params.Path)
 
 	f, err := os.Open(full)
 	if err != nil {
@@ -250,7 +254,7 @@ func (s *Server) GetRaw(w http.ResponseWriter, r *http.Request, params api.GetRa
 		return
 	}
 
-	contentType := mime.TypeByExtension(filepath.Ext(full))
+	contentType := mime.TypeByExtension(path.Ext(name))
 	if contentType == "" {
 		contentType = "application/octet-stream"
 	}