feat(workbench): 插件素材与画布视觉 - 完成 Eagle 外部来源与节点可读性适配

web/src/lib/canvas-theme.ts

@@ -14,6 +14,9 @@ export const canvasThemes = {
             fill: "#ffffff",
             panel: "#ffffff",
             stroke: "#e2e4e8",
+            edge: "rgba(15,23,42,.16)",
+            shadow: "0 6px 18px rgba(15,23,42,.08)",
+            hoverShadow: "0 10px 24px rgba(15,23,42,.12)",
             activeStroke: "#111827",
             placeholder: "#9ca3af",
             text: "#111827",
@@ -77,6 +80,9 @@ export const canvasThemes = {
             fill: "#181818",
             panel: "#141414",
             stroke: "rgba(255,255,255,.12)",
+            edge: "rgba(255,255,255,.18)",
+            shadow: "0 8px 24px rgba(0,0,0,.34)",
+            hoverShadow: "0 12px 30px rgba(0,0,0,.46)",
             activeStroke: "#f1f1f1",
             placeholder: "#737373",
             text: "#ededed",