refactor(renderer): select paths by GPU limits

Keep storage fast paths on capable adapters and use packed or texture fallbacks only when device limits require them.\n\nCompact mesh-edge varyings to avoid WebGL shader rejection.

Cargo.lock

@@ -36,6 +36,7 @@ dependencies = [
  "log",
  "lyon_tessellation",
  "lzma-sys",
+ "naga",
  "ocs_plugin_api",
  "open",
  "printpdf",