fix(ephemeris): alias the engine's three panchanga spellings to the table

Coordinator ruling (brief author, 2026-09-26): Aindra -> Indra (因陀罗),
Variyana -> Variyan (安逸), Dhanishtha -> Dhanishta (虚宿). Spelling aliases
only; the brief's table and its typed test copy are unchanged. BLOCKED item
struck through, PROGRESS / checklist / task index updated.

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

frontend/src/lib/panchanga-names-zh.ts

@@ -9,7 +9,10 @@
  *
  * Matching ignores case, spaces and hyphens. The three spelling aliases the
  * brief lists (Garija/Gara, Dwitiya/Dvitiya, Shashthi/Shashti) live in
- * `PANCHANGA_NAME_ALIASES`; no other alias is accepted.
+ * `PANCHANGA_NAME_ALIASES`, plus three the coordinator ruled on 2026-09-26 so
+ * the engine's own spellings (`scripts/muhurta.py`) reach the existing
+ * entries: Aindra → Indra, Variyana → Variyan, Dhanishtha → Dhanishta. These
+ * are spellings, not translations; no other alias is accepted.
  */
 
 export type PanchangaNameKind = "tithi" | "nakshatra" | "yoga" | "karana";
@@ -114,11 +117,14 @@ export const KARANA_ZH: Readonly<Record<string, string>> = {
   Kimstughna: "金斯图格纳",
 };
 
-/** Spelling alias → table key. Only the three pairs the brief names. */
+/**
+ * Spelling alias → table key. The brief's three pairs, plus the engine's three
+ * spellings (coordinator ruling 2026-09-26).
+ */
 export const PANCHANGA_NAME_ALIASES: Readonly<Record<PanchangaNameKind, Readonly<Record<string, string>>>> = {
   tithi: { Dvitiya: "Dwitiya", Shashti: "Shashthi" },
-  nakshatra: {},
-  yoga: {},
+  nakshatra: { Dhanishtha: "Dhanishta" },
+  yoga: { Aindra: "Indra", Variyana: "Variyan" },
   karana: { Gara: "Garija" },
 };