fix(rendering): bound portal resource lifetime

Separate logical ownership, render publication, and GPU retirement across live entities, landblocks, particles, textures, mesh arenas, portal/UI teardown, and per-frame scratch storage. Add bounded DAT/texture caches, upload budgets, three-frame fence retirement, exact-incarnation appearance reconciliation, frame pacing, and extensive lifetime conformance coverage.\n\nThe seven-destination connected route now cuts peak working/private memory roughly in half, returns Caul to 125-153 FPS locally, and produces no WER or AMD reset.\n\nCo-authored-by: OpenAI Codex <codex@openai.com>

src/AcDream.UI.Abstractions/Panels/Settings/DisplaySettings.cs

@@ -37,14 +37,15 @@ public sealed record DisplaySettings(
     ParticleRange ParticleRange)
 {
     /// <summary>Values used on first launch / when settings.json is absent.
-    /// Geometry/render defaults preserve the pre-L.0 runtime state — Resolution
-    /// matches the WindowOptions startup size (1280×720), FieldOfView
-    /// matches camera FovY (60°), VSync matches WindowOptions (false),
+    /// Geometry defaults preserve the pre-L.0 runtime state: Resolution
+    /// matches the WindowOptions startup size (1280×720) and FieldOfView
+    /// matches camera FovY (60°). VSync defaults on so normal rendering is
+    /// synchronized to the active monitor, while
     /// ShowFps matches retail's initially-hidden SmartBox FPS readout.</summary>
     public static DisplaySettings Default { get; } = new(
         Resolution:   "1280x720",
         Fullscreen:   false,
-        VSync:        false,
+        VSync:        true,
         FieldOfView:  60f,
         Gamma:        1.0f,
         ShowFps:      false,