Use lunar calendar input for birth date with solar conversion display.

Add LunarBirthPicker for bazi and combined forms, converting lunar input to solar for chart calculation.

Co-authored-by: Cursor <cursoragent@cursor.com>

types/lunar-javascript.d.ts

@@ -1,5 +1,10 @@
 declare module "lunar-javascript" {
   export class Solar {
+    static fromYmd(
+      year: number,
+      month: number,
+      day: number,
+    ): Solar;
     static fromYmdHms(
       year: number,
       month: number,
@@ -8,12 +13,24 @@ declare module "lunar-javascript" {
       minute: number,
       second: number,
     ): Solar;
+    static fromDate(date: Date): Solar;
     getLunar(): Lunar;
+    getWeek(): number;
     toYmd(): string;
     toYmdHms(): string;
+    toFullString(): string;
   }
 
   export class Lunar {
+    static fromYmd(
+      year: number,
+      month: number,
+      day: number,
+    ): Lunar;
+    getSolar(): Solar;
+    getYear(): number;
+    getMonth(): number;
+    getDay(): number;
     getEightChar(): EightChar;
     getDayInGanZhi(): string;
     getTimeInGanZhi(): string;