fix(view): park untagged leaves in non-Arrange modes; refresh TCP/MCP on apply

planToggle now enumerates all leaves in the FolderTree instead of only tagged
membership entries, so untagged (Arrange-member) tracks park in Design and
restore in Arrange. applyMode calls TrackList_AdjustWindows + UpdateArrange so
changes render immediately. Correct the stale "tagged-only" invariant comments.

src/view.cpp

@@ -27,6 +27,8 @@
 #define REAPERAPI_WANT_TrackFX_SetOffline
 #define REAPERAPI_WANT_Undo_BeginBlock2
 #define REAPERAPI_WANT_Undo_EndBlock2
+#define REAPERAPI_WANT_TrackList_AdjustWindows
+#define REAPERAPI_WANT_UpdateArrange
 #include "reaper_plugin_functions.h"
 
 namespace reasampler {
@@ -191,6 +193,14 @@ bool applyMode(ViewModeModel& model, const std::string& targetModeId, ReaProject
 
     model.setActiveMode(targetModeId);
 
+    // Force REAPER to rebuild the TCP + MCP so visibility/park changes appear now,
+    // not on the user's next TCP interaction. TrackList_AdjustWindows(false) does the
+    // major (full) relayout required when tracks appear/disappear from the panels;
+    // UpdateArrange() repaints the arrange view. Both are documented for exactly this
+    // "you changed track-info flags, now refresh the panels" case.
+    TrackList_AdjustWindows(false);
+    UpdateArrange();
+
     Undo_EndBlock2(proj, "ReaSampler: apply Design View mode", -1);
     return true;
 }