wasm-port-rebase: KiCad 10.0.4 rebase + WASM build adaptations

Root-side changes for the wasm-port-rebase work:
- kicad submodule bumped to wasm-port-rebase (43-commit rebase onto KiCad 10.0.4
  + the KiCad-10 WASM source adaptations)
- wasm/kiplatform/policy.cpp: GetPolicyEnumUInt -> std::optional (KiCad 10 API)
- wasm/stubs/api_plugin_stub.cpp: API_PLUGIN_MANAGER signature sync (KiCad 10 API)

Compiles 100% for pcbnew (3D viewer on, -O1); WASM link + e2e parity still pending.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

kicad

@@ -1 +1 @@
-Subproject commit 6f82742e689ae46b75cbc796baf361452fff34f8
+Subproject commit 84443246e34cd17e9ce8a3a0e7598efd0d7cc1c4

wasm/kiplatform/policy.cpp

@@ -5,6 +5,7 @@
 
 #include <kiplatform/policy.h>
 #include <wx/string.h>
+#include <optional>
 
 namespace KIPLATFORM
 {
@@ -17,10 +18,10 @@ PBOOL GetPolicyBool( const wxString& aKey )
     return PBOOL::NOT_CONFIGURED;
 }
 
-std::uint32_t GetPolicyEnumUInt( const wxString& aKey )
+std::optional<std::uint32_t> GetPolicyEnumUInt( const wxString& aKey )
 {
     // No enterprise policies in browser environment
-    return 0;
+    return std::nullopt;
 }
 
 } // namespace POLICY

wasm/stubs/api_plugin_stub.cpp

@@ -83,8 +83,11 @@ API_PLUGIN_MANAGER::API_PLUGIN_MANAGER( wxEvtHandler* aParent ) :
 {
 }
 
-void API_PLUGIN_MANAGER::ReloadPlugins()
+void API_PLUGIN_MANAGER::ReloadPlugins( std::optional<wxString> aDirectoryToScan,
+                                        std::shared_ptr<REPORTER> aReporter )
 {
+    (void) aDirectoryToScan;
+    (void) aReporter;
     // No-op: plugins not available in WASM
 }
 
@@ -93,9 +96,11 @@ void API_PLUGIN_MANAGER::RecreatePluginEnvironment( const wxString& aIdentifier
     (void)aIdentifier;
 }
 
-void API_PLUGIN_MANAGER::InvokeAction( const wxString& aIdentifier )
+void API_PLUGIN_MANAGER::InvokeAction( const wxString& aIdentifier,
+                                       std::shared_ptr<REPORTER> aReporter )
 {
     (void)aIdentifier;
+    (void) aReporter;
 }
 
 std::optional<const PLUGIN_ACTION*> API_PLUGIN_MANAGER::GetAction( const wxString& aIdentifier )