feat(编辑能力): 完善继承样式编辑与受限提示，优化编辑入口和工具栏布局

assets/webui/ofdgo.css

@@ -374,6 +374,34 @@ button:not(:disabled):hover {
 	transform: translate(-50%, -50%) rotate(90deg);
 }
 
+.edit-icon {
+	position: relative;
+	width: 15px;
+	height: 15px;
+	transform: rotate(-45deg);
+}
+
+.edit-icon::before {
+	position: absolute;
+	top: 5px;
+	left: 4px;
+	width: 9px;
+	height: 3px;
+	border: 1px solid currentColor;
+	content: "";
+}
+
+.edit-icon::after {
+	position: absolute;
+	top: 5px;
+	left: 0;
+	width: 4px;
+	height: 5px;
+	background: currentColor;
+	clip-path: polygon(0 50%, 100% 0, 100% 100%);
+	content: "";
+}
+
 .toolbar-space {
 	flex: 1 1 auto;
 }
@@ -1305,6 +1333,10 @@ button.outline-link:hover {
 	outline: calc(1px / var(--surface-scale)) solid var(--accent);
 }
 
+.edit-object.read-only {
+	cursor: default;
+}
+
 .edit-line::before {
 	position: absolute;
 	inset: calc(-4px / var(--surface-scale));