Prepare circuits for future sizing

src/frontend/components/circuit-tree-editor.tsx

@@ -104,6 +104,7 @@ interface CircuitSnapshot {
   rcdAssignment?: string;
   terminalDesignation?: string;
   voltage?: number;
+  controlRequirement?: string;
   status?: string;
   isReserve: boolean;
   remark?: string;
@@ -938,7 +939,7 @@ export function CircuitTreeEditor(props: { projectId: string; circuitListId: str
     const payload: Record<string, unknown> = {};
     if (key === "protectionSummary" || key === "cableSummary") {
       payload.remark = draft.trim() === "" ? undefined : draft;
-    } else if (["protectionRatedCurrent", "cableLength"].includes(key)) {
+    } else if (["protectionRatedCurrent", "cableLength", "voltage"].includes(key)) {
       payload[key] = parseNumeric(key, draft);
     } else if (key === "isReserve") {
       const normalized = draft.trim().toLowerCase();
@@ -1510,6 +1511,7 @@ export function CircuitTreeEditor(props: { projectId: string; circuitListId: str
         rcdAssignment: found.rcdAssignment ?? undefined,
         terminalDesignation: found.terminalDesignation ?? undefined,
         voltage: found.voltage ?? undefined,
+        controlRequirement: found.controlRequirement ?? undefined,
         status: found.status ?? undefined,
         isReserve: found.isReserve,
         remark: found.remark ?? undefined,
@@ -1534,6 +1536,7 @@ export function CircuitTreeEditor(props: { projectId: string; circuitListId: str
       rcdAssignment: snapshot.rcdAssignment,
       terminalDesignation: snapshot.terminalDesignation,
       voltage: snapshot.voltage,
+      controlRequirement: snapshot.controlRequirement,
       status: snapshot.status,
       isReserve: snapshot.isReserve,
       remark: snapshot.remark,