Merge dev (Phase D1) into p1-w9-bank-panel

# Conflicts:
#	CMakeLists.txt

CMakeLists.txt

@@ -45,6 +45,15 @@ target_include_directories(capture_paths PUBLIC src)
 add_library(bank_grid STATIC src/bank_grid.cpp)
 target_include_directories(bank_grid PUBLIC src)
 
+# ---------------------------------------------------------------------------
+# 2d) Pure view_mode_model library — NO REAPER, NO SWELL. The Design View heart
+#     (Phase D1): mode registry + GUID-keyed membership index + folder-tree-aware
+#     visibility derivation + parking/restore planner + JSON round-trip. Mirror of
+#     bank_model; the folder tree is an INPUT supplied by the D2 shell.
+# ---------------------------------------------------------------------------
+add_library(view_mode_model STATIC src/view_mode_model.cpp)
+target_include_directories(view_mode_model PUBLIC src)
+
 # ---------------------------------------------------------------------------
 # 3) Standalone tests for the pure modules (run without launching REAPER).
 # ---------------------------------------------------------------------------
@@ -65,6 +74,10 @@ add_executable(bank_grid_tests tests/test_bank_grid.cpp)
 target_link_libraries(bank_grid_tests PRIVATE bank_grid)
 add_test(NAME bank_grid_tests COMMAND bank_grid_tests)
 
+add_executable(view_mode_model_tests tests/test_view_mode_model.cpp)
+target_link_libraries(view_mode_model_tests PRIVATE view_mode_model)
+add_test(NAME view_mode_model_tests COMMAND view_mode_model_tests)
+
 # ---------------------------------------------------------------------------
 # 4) The REAPER extension — a loadable module (dlopen'd by REAPER, not linked).
 # ---------------------------------------------------------------------------
@@ -86,7 +99,7 @@ add_library(reaper_reasampler MODULE
     src/bank_panel.cpp
     ${LICE_SRC}
 )
-target_link_libraries(reaper_reasampler PRIVATE bank_model capture_paths peaks bank_grid)
+target_link_libraries(reaper_reasampler PRIVATE bank_model capture_paths peaks bank_grid view_mode_model)
 target_include_directories(reaper_reasampler PRIVATE ${SDK_INC} ${WDL_INC})
 set_target_properties(reaper_reasampler PROPERTIES PREFIX "" OUTPUT_NAME "reaper_reasampler")