feat(schematic): eeschema WASM build + e2e harness

wasm/stubs/eeschema_ngspice_data_stubs.cpp

@@ -0,0 +1,28 @@
+/*
+ * Empty replacements for the four largest ngspice model data initializers.
+ *
+ * Each of sim_model_ngspice_data_{bsim4,b3soi,b4soi,hsim}.cpp defines a
+ * single function (addBSIM4/addB3SOI/addB4SOI/addHSIM) that pushes hundreds
+ * of entries into NGSPICE_MODEL_INFO_MAP::modelInfos[...]. Once compiled to
+ * WASM these functions exceed the V8/SpiderMonkey limit on locals per
+ * function ("too many locals"), so Firefox refuses to instantiate the
+ * resulting module.
+ *
+ * The simulator UI is never reachable in the WASM build (FRAME_SIMULATOR
+ * fails to instantiate via the ngspice header stub at
+ * wasm/stubs/ngspice/sharedspice.h), so leaving these tables empty is safe.
+ *
+ * eeschema/CMakeLists.txt excludes the original four sources from
+ * EESCHEMA_SIM_SRCS for EMSCRIPTEN and adds this file instead.
+ */
+
+#ifdef __EMSCRIPTEN__
+
+#include <sim/sim_model_ngspice.h>
+
+void NGSPICE_MODEL_INFO_MAP::addBSIM4() {}
+void NGSPICE_MODEL_INFO_MAP::addB3SOI() {}
+void NGSPICE_MODEL_INFO_MAP::addB4SOI() {}
+void NGSPICE_MODEL_INFO_MAP::addHSIM()  {}
+
+#endif // __EMSCRIPTEN__