Strip FX writes from the Design View mode switch; split view.cpp into park/lanes/reconcile/tracks and add the record-scoped undo repair pass

src/app/CMakeLists.txt

@@ -39,8 +39,11 @@ add_library(reaper_reasampler MODULE
     ${LICE_SRC}
     ${REASAMPLER_SRC_DIR}/shell/capture/insert.cpp
     ${REASAMPLER_SRC_DIR}/shell/view/view.cpp
-    ${REASAMPLER_SRC_DIR}/shell/view/view_fx_park.cpp
+    ${REASAMPLER_SRC_DIR}/shell/view/view_lanes.cpp
+    ${REASAMPLER_SRC_DIR}/shell/view/view_park.cpp
+    ${REASAMPLER_SRC_DIR}/shell/view/view_reconcile.cpp
     ${REASAMPLER_SRC_DIR}/shell/view/view_solo.cpp
+    ${REASAMPLER_SRC_DIR}/shell/view/view_tracks.cpp
     ${REASAMPLER_SRC_DIR}/shell/capture/track_guid.cpp
     ${REASAMPLER_SRC_DIR}/shell/capture/provenance_shell.cpp
     ${REASAMPLER_SRC_DIR}/shell/capture/item_read.cpp
@@ -56,20 +59,19 @@ add_library(reaper_reasampler MODULE
     ${REASAMPLER_SRC_DIR}/shell/actions/insert_fx_action.cpp
     ${REASAMPLER_SRC_DIR}/shell/persist/usage_scan.cpp
 )
-target_link_libraries(reaper_reasampler PRIVATE json wire file_bytes bank_model capture_paths capture_name peaks bank_grid mode_switch tab_strip view_mode_model view_tree fx_state guid_diff lane_keys solo_cache insert_plan render_settings render_window track_topology batch_capture tail_control capture_realtime bank_book wav_codec origin_ledger tracking_authority prune_reconcile prune_button app_version provenance drag_out instrument_drop theme component_geometry action_bar footer_bar overflow_menu mode_enable insert_fx_enable tooltip card_meta card_drag assignment_request bank_sync sample_usage bake_wire resample_name export_bank package_pickers)
+target_link_libraries(reaper_reasampler PRIVATE json wire file_bytes bank_model capture_paths capture_name peaks bank_grid mode_switch tab_strip view_mode_model view_tree fx_state applied_state guid_diff lane_keys solo_cache insert_plan render_settings render_window track_topology batch_capture tail_control capture_realtime bank_book wav_codec origin_ledger tracking_authority prune_reconcile prune_button app_version provenance drag_out instrument_drop theme component_geometry action_bar footer_bar overflow_menu mode_enable insert_fx_enable tooltip card_meta card_drag assignment_request bank_sync sample_usage bake_wire resample_name export_bank package_pickers)
 # NOT linked here, deliberately: sampler_core / pitch_shift / the filter / limiter. The
 # instrument renders its own bake in its own process, which is what keeps the extension's
 # link graph free of the voice engine — a link edge to it here means the design drifted.
 target_include_directories(reaper_reasampler PRIVATE ${SDK_INC} ${WDL_INC})
 
-# The park surface's decisions are pure (header-inline, no REAPER types), so they are
-# CTest-covered like a core/ module: the snapshot trust test, the refusal message and
-# its once-per-changed-set gate, and the apply's undo-point fold. Declared here rather
-# than in a src/shell/view/CMakeLists.txt because that directory deliberately has none
-# — its TUs are compiled into this target directly. view_mode_model is linked for
-# makeParkPlan, the flag set the trust test folds over; pinning that against hand-built
-# ops would not catch a change to the planner.
-reasampler_test(view_fx_park LINK fx_offline view_mode_model)
+# The view shell's decisions are pure (header-inline, no REAPER types), so they are
+# CTest-covered like a core/ module: the Flag -> parameter mapping, the apply's
+# undo-point fold, and the reconcile's scope rule and drift trigger. Declared here
+# rather than in a src/shell/view/CMakeLists.txt because that directory deliberately
+# has none — its TUs are compiled into this target directly.
+reasampler_test(view_park LINK view_mode_model)
+reasampler_test(view_reconcile LINK applied_state view_mode_model)
 
 # Bank-package import: the promptless verb plus its action skin. Kept as its own
 # appended block rather than merged into the lists above, so the two package

src/app/main.cpp

@@ -38,7 +38,9 @@
 #include "shell/panel/panel_input.h"             // bankPanelRefresh / bankPanelNotifyProjectLoaded
 #include "shell/panel/panel_window.h"            // panel lifecycle (init/toggle/open-query/shutdown)
 #include "shell/persist/session.h"               // ReaSamplerSession
-#include "shell/view/view.h"                     // reconcileManagedLanes / applyMode
+#include "shell/view/view.h"                     // applyMode
+#include "shell/view/view_lanes.h"               // reconcileManagedLanes
+#include "shell/view/view_reconcile.h"           // reconcileAppliedFlags
 
 namespace capture = reasampler::capture;
 
@@ -205,6 +207,11 @@ static void OnTimer()
         // the cross-session source of truth) BEFORE reapplying visibility. Never
         // re-mints, never mass-tags.
         reasampler::reconcileManagedLanes(g_session.view(), nullptr);
+        // An undo/redo reload also arrives here, and REAPER's undo does not restore
+        // the visibility flags a park drove (UNDO_STATE_TRACKCFG does not carry them).
+        // Repair the tracks the reloaded model no longer records BEFORE the reapply,
+        // which only ever drives tracks the model still records.
+        reasampler::reconcileAppliedFlags(g_session.view(), nullptr);
         reasampler::applyMode(g_session.view(), g_session.view().activeModeId(), nullptr);
     }