下段(日志)固定 800 高；中段 = 面板高 − 上段20% − 800（仍铺满，不出空带）

viewpanel/src/com/spineview/ObjectPanel.java

@@ -231,14 +231,17 @@ public final class ObjectPanel {
           // Stage 上：`B()F`=getHeight、`D()F`=getWidth（实测：4K 窗口 2044 / 3726）
           if (stage != null) stageH = floatOf(stage, "B");
           float panelH = stageH > 300f ? stageH - 100f : 984f;
-          call(buttonsCell, "I", new Class<?>[] {float.class}, cellClass,
-              Float.valueOf(panelH * 0.2f));
-          call(middleCell, "I", new Class<?>[] {float.class}, cellClass,
-              Float.valueOf(panelH * 0.6f));
-          call(logCell, "I", new Class<?>[] {float.class}, cellClass, Float.valueOf(panelH * 0.2f));
+          // 上段 = 面板 20%；下段(日志) = 固定 800；中段 = 剩下全部（保证仍然铺满）
+          float logH = 800f;
+          float buttonsH = panelH * 0.2f;
+          float middleH = panelH - buttonsH - logH;
+          if (middleH < 120f) middleH = 120f;
+          call(buttonsCell, "I", new Class<?>[] {float.class}, cellClass, Float.valueOf(buttonsH));
+          call(middleCell, "I", new Class<?>[] {float.class}, cellClass, Float.valueOf(middleH));
+          call(logCell, "I", new Class<?>[] {float.class}, cellClass, Float.valueOf(logH));
           call(state.root, "b_", new Class<?>[0], void.class);
           System.err.println("[panel] 面板高度(自动): stage=" + stageH + " -> " + panelH
-              + "；三段 = " + (panelH * 0.2f) + " / " + (panelH * 0.6f) + " / " + (panelH * 0.2f));
+              + "；三段 = " + buttonsH + " / " + middleH + " / " + logH);
         } catch (Throwable error) {
           System.err.println("[panel] 自动三段高度失败: " + error);
         }