fix(style): validate layer style configuration

.opencode/tools/apply_layer_style.ts

@@ -28,8 +28,11 @@ export default tool({
           .describe("Classification method."),
         segments: tool.schema
           .number()
+          .int()
+          .min(2)
+          .max(10)
           .optional()
-          .describe("Number of segments."),
+          .describe("Number of rendered intervals, from 2 to 10."),
         min_size: tool.schema
           .number()
           .optional()
@@ -54,9 +57,9 @@ export default tool({
           .enum(["single", "gradient", "rainbow", "custom"])
           .optional()
           .describe("Color strategy."),
-        single_palette_index: tool.schema.number().optional(),
-        gradient_palette_index: tool.schema.number().optional(),
-        rainbow_palette_index: tool.schema.number().optional(),
+        single_palette_index: tool.schema.number().int().min(0).max(6).optional(),
+        gradient_palette_index: tool.schema.number().int().min(0).max(2).optional(),
+        rainbow_palette_index: tool.schema.number().int().min(0).max(1).optional(),
         show_labels: tool.schema
           .boolean()
           .optional()
@@ -65,7 +68,7 @@ export default tool({
           .boolean()
           .optional()
           .describe("Whether to show ids."),
-        opacity: tool.schema.number().optional().describe("Opacity in [0, 1]."),
+        opacity: tool.schema.number().min(0).max(1).optional().describe("Opacity in [0, 1]."),
         adjust_width_by_property: tool.schema
           .boolean()
           .optional()
@@ -73,11 +76,11 @@ export default tool({
         custom_breaks: tool.schema
           .array(tool.schema.number())
           .optional()
-          .describe("Custom break values."),
+          .describe("Strictly increasing boundaries. Length must equal segments + 1."),
         custom_colors: tool.schema
           .array(tool.schema.string())
           .optional()
-          .describe("Custom rgba colors."),
+          .describe("Custom CSS colors. Length must equal segments."),
       })
       .optional()
       .describe(
@@ -87,8 +90,24 @@ export default tool({
   async execute(args) {
     const layerLabel = args.layer_id === "junctions" ? "节点" : "管道";
     if (args.reset_to_default) {
-      return `已将${layerLabel}图层重置为默认样式。`;
+      return `已提交${layerLabel}图层默认样式重置请求。`;
     }
-    return `已对${layerLabel}图层应用样式。`;
+    const style = args.style_config;
+    if (style?.custom_breaks) {
+      if (
+        style.custom_breaks.some(
+          (value, index, values) => index > 0 && value <= values[index - 1],
+        )
+      ) {
+        throw new Error("custom_breaks must be strictly increasing");
+      }
+      if (style.segments && style.custom_breaks.length !== style.segments + 1) {
+        throw new Error("custom_breaks length must equal segments + 1");
+      }
+    }
+    if (style?.segments && style.custom_colors && style.custom_colors.length !== style.segments) {
+      throw new Error("custom_colors length must equal segments");
+    }
+    return `已提交${layerLabel}图层样式请求。`;
   },
 });