feat(chart): Moon chart from D1 and transit chart for today in the natal houses (T4)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017eEAG8HD3mm8gsKXgk8uU8

frontend/src/app/api/ephemeris/route.ts

@@ -13,6 +13,7 @@ import {
 import { dailyProfilePayload } from "@/lib/global-birth-payloads";
 import { consumeUserRequestRateLimit } from "@/lib/request-rate-limit";
 import { globalBirthProfileFromAccountRow } from "@/lib/server-owned-birth-profile";
+import { transitChartBody } from "@/lib/transit-chart-body";
 import { ConsultationSubjectError, loadSubjectBirth, subjectIdFromQuery } from "@/lib/subject-birth";
 import { createServerSupabaseClient } from "@/lib/supabase/server";
 
@@ -215,20 +216,3 @@ export async function GET(request: Request) {
   }
   return NextResponse.json(parsed.data);
 }
-
-function transitChartBody(birth: BirthPayload, date: string): Record<string, unknown> {
-  const [year, month, day] = date.split("-").map(Number);
-  return {
-    year,
-    month,
-    day,
-    hour: 12,
-    minute: 0,
-    lat: birth.lat,
-    lon: birth.lon,
-    tz: birth.tz,
-    ayanamsa: birth.ayanamsa,
-    node_mode: birth.node_mode,
-    skip_vedastro_main_entry_overview: true,
-  };
-}