libs 0019: remote lib edit — invalidate, don't auto-reload; editor copy counted + re-read

- kicadLibsInvalidate: a peer's edit only drops the lib's plugin entry + pcbnew's
  PreloadedFootprints (the cache the old reload never cleared — tree/preview/
  LoadFootprint/update-from-library kept serving the old body); the fat re-load
  now runs lazily or from Update-from-library (kicadLibsReload, which also
  clears the preloaded cache)
- usage bridges count the Footprint/Symbol Editor's open copy; update re-opens
  an unmodified copy, reports a modified one
- embind TU gets eeschema/symbol_editor on its include path; smoke probes
- kicad → 27051b46e2

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012Wd1r3ewftpV1DBSEArpRa

wasm/bindings/pcbjam_libs_reload.h

@@ -77,6 +77,33 @@ inline void reloadLibrary( std::string aKind, std::string aNickname )
     } );
 }
 
+/**
+ * Cheap counterpart of reloadLibrary (libs 0019): drop the lib's LIB_DATA
+ * entry (plugin instance + parsed cache) so the NEXT access re-reads the
+ * provider — no eager LoadLibraryEntry fat-load, no tree mail. A remote edit
+ * calls this; the fat-load happens lazily when the user looks at the lib,
+ * or explicitly through reloadLibrary from "Update from library".
+ * (pcbnew's FOOTPRINT_LIBRARY_ADAPTER::PreloadedFootprints is invalidated by
+ * the pcbnew-side caller — this header stays common-code only.)
+ */
+inline void invalidateLibrary( std::string aKind, std::string aNickname )
+{
+    KIWAY_PLAYER* top =
+            wxTheApp ? dynamic_cast<KIWAY_PLAYER*>( wxTheApp->GetTopWindow() ) : nullptr;
+
+    if( !top )
+        return;
+
+    const bool     fp = aKind == "footprint";
+    const wxString nick = wxString::FromUTF8( aNickname.c_str() );
+
+    pcbjam_collab::runOnCoroutine( top, [fp, nick]()
+    {
+        Pgm().GetLibraryManager().ReloadLibraryEntry(
+                fp ? LIBRARY_TABLE_TYPE::FOOTPRINT : LIBRARY_TABLE_TYPE::SYMBOL, nick );
+    } );
+}
+
 /**
  * Add one PCBJAM lib-table row at RUNTIME and load it — the lib SET is
  * otherwise frozen at boot (sym/fp-lib-table are written once in preRun).