feat: validar y normalizar fechas explícitas (YYYY-MM-DD y YY-MM-DD)

Co-authored-by: aider (openrouter/openai/gpt-5) <aider@aider.chat>

src/services/command.ts

@@ -58,6 +58,41 @@ export class CommandService {
 
 		const todayYMD = ymdFromDateInTZ(new Date());
 
+		// Helpers para validar y normalizar fechas explícitas
+		const isLeap = (y: number) => (y % 4 === 0 && y % 100 !== 0) || (y % 400 === 0);
+		const daysInMonth = (y: number, m: number) => {
+			if (m === 2) return isLeap(y) ? 29 : 28;
+			return [31, -1, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31][m - 1];
+		};
+		const isValidYMD = (ymd: string): boolean => {
+			const m = /^(\d{4})-(\d{2})-(\d{2})$/.exec(ymd);
+			if (!m) return false;
+			const Y = parseInt(m[1], 10);
+			const MM = parseInt(m[2], 10);
+			const DD = parseInt(m[3], 10);
+			if (MM < 1 || MM > 12) return false;
+			const dim = daysInMonth(Y, MM);
+			if (!dim || DD < 1 || DD > dim) return false;
+			return true;
+		};
+		const normalizeDateToken = (t: string): string | null => {
+			// YYYY-MM-DD
+			if (/^\d{4}-\d{2}-\d{2}$/.test(t)) {
+				return isValidYMD(t) ? t : null;
+			}
+			// YY-MM-DD -> 20YY-MM-DD
+			const m = /^(\d{2})-(\d{2})-(\d{2})$/.exec(t);
+			if (m) {
+				const yy = parseInt(m[1], 10);
+				const mm = m[2];
+				const dd = m[3];
+				const yyyy = 2000 + yy;
+				const ymd = `${String(yyyy)}-${mm}-${dd}`;
+				return isValidYMD(ymd) ? ymd : null;
+			}
+			return null;
+		};
+
 		type DateCandidate = { index: number; ymd: string };
 		const dateCandidates: DateCandidate[] = [];
 		const dateTokenIndexes = new Set<number>();
@@ -67,11 +102,11 @@ export class CommandService {
 			const raw = parts[i];
 			const low = raw.toLowerCase().replace(/^[([{¿¡"']+/, '').replace(/[.,;:!?)\]}¿¡"'']+$/, '');
 
-			// Fecha explícita YYYY-MM-DD
+			// Fecha explícita en formatos permitidos: YYYY-MM-DD o YY-MM-DD (expandido a 20YY)
-			if (/^\d{4}-\d{2}-\d{2}$/.test(low)) {
+			{
-				// Validar rango básico y filtrar pasado según hoy en TZ
+				const norm = normalizeDateToken(low);
-				if (low >= todayYMD) {
+				if (norm && norm >= todayYMD) {
-					dateCandidates.push({ index: i, ymd: low });
+					dateCandidates.push({ index: i, ymd: norm });
 					dateTokenIndexes.add(i);
 					continue;
 				}