Drain deferred FX parks before the view model is serialized; re-validate track handles per intent; pin the restore-plan round trip

src/app/CMakeLists.txt

@@ -63,8 +63,10 @@ target_include_directories(reaper_reasampler PRIVATE ${SDK_INC} ${WDL_INC})
 # The deferred FX-park queue's re-entrancy rule is pure (header-inline, no REAPER
 # types), so it is CTest-covered like a core/ module. 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_fx_park LINK fx_offline)
+# TUs are compiled into this target directly. view_mode_model is linked for
+# makeRestorePlan alone: the cancel path's round trip is a contract between the two,
+# and pinning it against hand-built ops would not catch a change to either half.
+reasampler_test(view_fx_park LINK fx_offline 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