fix: preserve SCADA comparison device coverage

src/features/agent/presentation/command-schema.ts

@@ -9,6 +9,7 @@ export function createChartSampleTimeSchema(zod: typeof z = z) {
 
 type PublicationChart = {
   chart_type: string;
+  scada?: { role: "current" | "comparison"; window_start: string };
   x_data: string[];
   series: Array<{ type?: string; data: Array<number | null>; sample_times?: Array<string | null> }>;
 };
@@ -56,8 +57,12 @@ export function chartPublicationError(chart: PublicationChart): string | null {
     if ((series.type ?? "line") === "line") for (const base of bases) current.add(base);
     else historical.push(...bases);
   }
-  if (current.size !== 1) return "当前 line 必须包含真实采样时间，且所有当前曲线使用同一窗口";
-  const start = [...current][0];
+  const emptyScada = current.size === 0 && chart.scada?.role === "comparison";
+  if (current.size !== 1 && !emptyScada) return "当前 line 必须包含真实采样时间，且所有当前曲线使用同一窗口";
+  const windowStart = emptyScada ? Date.parse(chart.scada!.window_start) + 8 * 3600_000 : 0;
+  const midnight = Math.floor(windowStart / 86400_000) * 86400_000;
+  const firstSlot = midnight + seconds[0] * 1000;
+  const start = emptyScada ? firstSlot + (firstSlot < windowStart ? 86400_000 : 0) : [...current][0];
   return historical.some((base) => start <= base || (start - base) % 86400_000 !== 0)
     ? "历史 scatter 必须来自当前窗口之前的对应日期" : null;
 }
@@ -67,9 +72,25 @@ export function createViewSchemas(zod: typeof z = z, publication = false, valida
   const z = zod;
 
   const presentationIdentifierSchema = z.string().trim().min(1).max(128);
+  const scadaChartSchema = z.object({
+    role: z.enum(["current", "comparison"]),
+    metric: z.enum(["pressure", "flow"]),
+    unit: presentationIdentifierSchema,
+    window_start: createChartSampleTimeSchema(z),
+    window_end: createChartSampleTimeSchema(z),
+    value_field: z.enum(["monitored_value", "cleaned_value"]).optional(),
+    // Populated by Server after checking observations, never a display exemption.
+    gaps: z.array(z.object({
+      device_id: presentationIdentifierSchema,
+      day_offset: z.number().int().min(0).max(7),
+      missing_count: z.number().int().min(1).max(100),
+      reason: z.enum(["no_readings", "outside_frozen_scope", "outside_frozen_window", "no_scheduled_samples"])
+    }).strict()).max(8).optional()
+  }).strict();
   const chartSchema = z
     .object({
       title: z.string().max(200),
+      scada: scadaChartSchema.optional(),
       chart_type: z.enum(["line", "bar", "time_comparison"]),
       x_axis_name: z.string().max(128).optional(),
       y_axis_name: z.string().max(128).optional(),
@@ -79,6 +100,8 @@ export function createViewSchemas(zod: typeof z = z, publication = false, valida
           z
             .object({
               name: z.string().max(128),
+              device_id: presentationIdentifierSchema.optional(),
+              day_offset: z.number().int().min(0).max(7).optional(),
               type: z.enum(["line", "bar", "scatter"]).optional(),
               data: z.array(z.number().finite().nullable()).min(1).max(100),
               sample_times: z.array(createChartSampleTimeSchema(z).nullable()).min(1).max(100).optional()