Terminate the FX reclaimer's undo span on EVERY project-state load, not just undo

BeginLoadProjectState now routes unbranched through fxReclaimAbandonForStateLoad;
only the session's deferred reload stays undo-only.

src/app/main.cpp

@@ -241,21 +241,19 @@ static void OnTimer()
 // TIMING: BeginLoadProjectState fires BEFORE any state restore, so reading
 // GetProjExtState here would return the PRE-undo value. Instead we raise a one-shot
 // reload request that OnTimer's poll() drains on the NEXT tick, once REAPER has
-// finished restoring the <EXTSTATE> block. A normal project open also fires this
-// (isUndo=false); ignored here so a normal open flows solely through the timer's
-// identity-transition Load path (no double load).
+// finished restoring the <EXTSTATE> block. Only the RELOAD REQUEST is undo-only: a
+// normal open's reload belongs to the timer's identity-transition Load path, whose
+// forked-sibling re-GUID branch requesting a reload here would bypass.
 static void OnBeginLoadProjectState(bool isUndo, project_config_extension_t* /*reg*/)
 {
+    // UNBRANCHED, and the reason the terminator is a hook at all: this is REAPER's one
+    // entry for a state load — "project load/undo", plus a new project
+    // (reaper_plugin.h:1203-1205) — and the last moment before the restore. Why that
+    // matters, and why isUndo does not narrow it: fxReclaimAbandonForStateLoad.
+    reasampler::fxReclaimAbandonForStateLoad();
+
     if (isUndo)
-    {
-        // BEFORE the reload request, and the whole reason this is a hook rather than
-        // something the reload's own reapply does on arrival: the reclaimer's undo block
-        // is open for at least kParkHoldMs after every real mode switch, and a switch is
-        // exactly what this undo is rolling back. Closing it here is the last moment it
-        // still closes over the state it was opened on.
-        reasampler::fxReclaimAbandonForStateLoad();
         g_session.requestReload();
-    }
 }
 
 // Intentional no-op: ReaSampler stores state via project EXT STATE, not this