Publish the Media Explorer import into REAPER's Media Explorer action section as well as Main — custom_action + hookcommand2, second forever-stable id, one handler.

src/shell/actions/ingest.h

@@ -29,12 +29,25 @@ namespace reasampler {
 
 class ReaSamplerSession;
 
-// `session` is shared with the capture / bank / Design-View families; the single
-// hookcommand in main.cpp routes fired ids here via ingestHandleCommand.
+// FOREVER-STABLE command-id suffixes — NEVER change after ship; user keybindings key off
+// the composed ids. Two, because the Media-Explorer import publishes into two action
+// sections and a custom_action idStr must be unique across all of them. Exposed here so
+// the id-composition contract is assertable without linking this REAPER-facing TU.
+inline constexpr const char* kIngestImportMediaExplorerId   = "INGEST_IMPORT_MEDIA_EXPLORER";
+inline constexpr const char* kIngestImportMediaExplorerMxId = "INGEST_IMPORT_MEDIA_EXPLORER_MX";
+
+// `session` is shared with the capture / bank / Design-View families; main.cpp's two
+// dispatch hooks route fired ids back through the two handlers below. Both registration
+// mechanisms are specified in root CLAUDE.md §"REAPER extension contract".
 void ingestRegisterActions(reaper_plugin_info_t* rec, ReaSamplerSession* session);
 
+// Main-section dispatch ("hookcommand").
 bool ingestHandleCommand(int command);
 
+// Non-main-section dispatch ("hookcommand2"). Claims only ids this family published
+// outside the Main section, so the two hooks never both claim one command.
+bool ingestHandleSectionCommand(int command);
+
 void ingestUnregisterActions(reaper_plugin_info_t* rec);
 
 // "The active sampler instance should now play (bankId, sampleId)." Called by EVERY