Join wait: animate through EVERY pre-mission state

Two follow-ups to the waiting-screen work, both user-reported:

1. "Animation frozen after connecting": once the console seats the player
   and sends the egg, the state advances LoadingMission -> WaitingForLaunch
   -- where NOTHING presents until the operator's RunMission, so the last
   idle frame froze on screen with the mission audio already running.
   ExecuteForeground now keeps the idle clear + overlay alive through
   LoadingMission/WaitingForLaunch/LaunchingMission (no early return -- the
   load/replication work continues), and ExecuteIdle picks per-state text:
     WaitingForEgg    "WAITING FOR MISSION ASSIGNMENT"
     Loading/Launching "LOADING MISSION / stand by"
     WaitingForLaunch "MISSION READY / waiting for the operator to launch"

2. The roster-full retry pause was a raw Sleep(3000) -- with the relay up
   and answering SEAT_FULL instantly, the process spent ~95% of its time
   unpumped (IsHungAppWindow TRUE, spinner frozen).  Now 30 pumped 100ms
   slices with the reason on screen ("session is FULL -- waiting for a
   seat to free up").

Verified live against the running operator relay: roster-full wait shows
the reason text, spinner advances across 500ms captures, IsHungAppWindow
false on every sample.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

engine/MUNGA/APP.cpp

@@ -548,6 +548,21 @@ Time endControls = Now();
 		CLEAR_FOREGROUND_PROCESSING();
 		return executeFrames;
 	}
+	//
+	// PRE-RUN WAIT STATES (2026-07-22, "animation frozen after connecting"):
+	// after the egg arrives the state advances LoadingMission ->
+	// WaitingForLaunch, where NOTHING presents until the operator's
+	// RunMission -- the last idle frame froze on screen (with the mission
+	// audio already running).  Keep the idle clear + waiting overlay alive
+	// through these states; NO early return -- the load steps / replication
+	// / network below must keep running.  ExecuteIdle picks per-state text.
+	//
+	if (GetApplicationState() == LoadingMission
+		|| GetApplicationState() == WaitingForLaunch
+		|| GetApplicationState() == LaunchingMission)
+	{
+		videoRenderer->ExecuteIdle();
+	}
 
 	//
 	//--------------------------------------------------------------------------

engine/MUNGA_L4/L4NET.CPP

@@ -1650,7 +1650,18 @@ Logical L4NetworkManager::RelayRequestSeat()
 			full_shown = 1;
 			banner_shown = 1;			// suppress the banner after this
 		}
-		Sleep(3000);
+		{
+			// pumped retry pause (the raw Sleep(3000) froze the window +
+			// spinner whenever the relay answered -- e.g. ROSTER FULL)
+			const char *why = roster_full
+				? "session is FULL -- waiting for a seat to free up"
+				: "retrying...";
+			for (int slice = 0; slice < 30; ++slice)	// 3s
+			{
+				RelayWaitTick("WAITING FOR THE OPERATOR'S SESSION", why);
+				Sleep(100);
+			}
+		}
 	}
 	return False;
 }

engine/MUNGA_L4/L4VIDEO.cpp

@@ -8846,8 +8846,21 @@ void DPLRenderer::ExecuteIdle()
 	// repainted after every Present; join/join_lan UX fix 2026-07-22).
 	{
 		HRESULT present_hr = mDevice->Present(NULL, NULL, NULL, NULL);
-		BTWaitScreenPaint("WAITING FOR MISSION ASSIGNMENT",
-			"the operator starts the session from the console");
+		const char *wait_line1 = "WAITING FOR MISSION ASSIGNMENT";
+		const char *wait_line2 = "the operator starts the session from the console";
+		switch (application ? application->GetApplicationState() : -1)
+		{
+		case Application::LoadingMission:
+		case Application::LaunchingMission:
+			wait_line1 = "LOADING MISSION";
+			wait_line2 = "stand by";
+			break;
+		case Application::WaitingForLaunch:
+			wait_line1 = "MISSION READY";
+			wait_line2 = "waiting for the operator to launch";
+			break;
+		}
+		BTWaitScreenPaint(wait_line1, wait_line2);
 		if (present_hr == D3DERR_DEVICELOST)
 	{
 		int bbCount = mPresentParams.BackBufferCount;