Add Snap to Render Resolution Sliders

UI/Window/RenderConfigWindow.cs

@@ -102,6 +102,20 @@ internal static class RenderConfigWindow
         
         double[] audioBitrateSnap = { 64, 96, 128, 192, 256, 320, 384 };
         
+        double[] renderWidthSnap = {
+            256, 426, 640, 854, 960, 1280, 1366, 1600, 1920, 2048, 2560, 3200, 3840, 4096, 5120, 5760, 6016, 7680, 10240, 15360, // 16:9
+            230, 384, 576, 768, 1152, 1440, 1680, 2880, 3072, // 16:10
+            192, 320, 480, 800, 1024, 1400, 2732, 6400, 11520 // 4:3
+        };
+
+        double[] renderHeightSnap = {
+            144, 240, 360, 480, 540, 720, 768, 900, 1080, 1152, 1440, 1800, 2160, 2304, 2880, 3240, 3384, 4320, 5760, 8640, // 16:9
+            400, 600, 800, 1050, 1200, 1600, 1920, 2400, 3200, 4800, 9600, // 16:10
+            864, 960, 1536, 2048, 3072 // 4:3
+        };
+        
+        // TODO: Presets
+        
         // 1-3. Top section: 좌/우 컨테이너 1개씩으로 3행을 쌓는다 (중앙선 1개)
         var (topLeft, topRight) = CreateTwoColumnPanel(scrollContent, spacing: 8f, columnSpacing: 10f);
         
@@ -132,7 +146,7 @@ internal static class RenderConfigWindow
             defaultValue: 2560, min: 0, max: 15360, value: 2560,
             format: "F0", clampMode: ClampMode.All,
             
-            sliderFilter: value => Math.Max(value, 2), inputFilter: value => Math.Max(value, 2), 
+            sliderFilter: value => renderWidthSnap.OrderBy(n => Math.Abs(n - value)).First(), inputFilter: value => Math.Max(value, 2), 
             onComplete: null, onChanged: val => { config.RenderWidth = (int)Math.Round(val); },
             text: LocalizationManager.Get("ui.render_config.render_width"),
             id: "slider_render_width", showFill: true
@@ -143,7 +157,7 @@ internal static class RenderConfigWindow
             defaultValue: 1440, min: 0, max: 8640, value: 1440,
             format: "F0", clampMode: ClampMode.All,
             
-            sliderFilter: value => Math.Max(value, 2), inputFilter: value => Math.Max(value, 2), 
+            sliderFilter: value => renderHeightSnap.OrderBy(n => Math.Abs(n - value)).First(), inputFilter: value => Math.Max(value, 2), 
             onComplete: null, onChanged: val => { config.RenderWidth = (int)Math.Round(val); },
             text: LocalizationManager.Get("ui.render_config.render_height"),
             id: "slider_render_height", showFill: true