chore(prc-001): followups #54 #55 #57 #58 — emoji validator + opt-in pricing + demo seed + tsconfig

Resuelve 4 de los followups creados post-archive de PRC-001:

#55 — Decisión de negocio (2026-04-21): emojis NO se permiten en Symbol config.
  - WordCounterService.ContainsEmoji(string): helper publico que reutiliza los
    rangos Unicode de IsEmojiRune (Emoticons, Pictographs, Dingbats, VS-16, ZWJ).
  - CreateChargeableCharConfigCommandValidator: regla .Must que rechaza emoji
    en Symbol con mensaje claro. Defensiva: cubre clientes directos al API
    (Postman, adversariales) mas alla del SymbolInput blocker del frontend.
  - Tests: 5 emojis positivos (smile/car/fire/heart VS-16/sun) + 8 plain symbols
    ($, %, !, ¡, @, €, ##, ABCD) + actualizacion del Api test E2E (Post_WithEmojiSymbol).

#57 — Alineacion FluentValidation con opt-in billing (CK_Price_NonNegative >= 0).
  - CreateChargeableCharConfigCommandValidator.PricePerUnit: GreaterThan(0)
    -> GreaterThanOrEqualTo(0). Mensaje explica el significado: 0 = no cobra.
  - Tests actualizados: PricePerUnit_Zero ahora Passes (era Fails). Negative
    sigue fallando. Api e2e usa -1 para el caso de rechazo.

#58 — tsconfig ignoreDeprecations + MSW handler (parte a).
  - src/web/tsconfig.json: agrega "ignoreDeprecations": "6.0" para silenciar
    el warning TS5101 del baseUrl deprecated en TS 6.x.
  - (El MSW handler de /api/v1/admin/product-types no aplica — los tests ya
    mockean ProductTypeSelect directamente; warning residual no existe.)

#54 — Seeder demo de overrides ficticios per-ProductType (V025).
  - database/migrations/V025__seed_chargeable_char_overrides_demo.sql:
    MERGE idempotente que crea overrides de ChargeableCharConfig para
    ProductTypes Clasificado/Notables/Fúnebres si existen en la DB.
    Precios ficticios ($ 5-8, % 3-5, ! 2-4, ¡ 2-4). No-op si los tipos no
    estan seedados (sera cuando PRD-008 haga seed de los 12 legacy).
  - V025_ROLLBACK.sql: elimina overrides demo preservando globales.
  - Aplicado en SIGCM2, SIGCM2_Test_App, SIGCM2_Test_Api.
  - database/README.md: V025 agregada al indice.

Tests: 1659 .NET (1310 Application + 349 Api) + 510 vitest — todos GREEN.

Closes #54, #55, #57, #58.

src/api/SIGCM2.Application/Pricing/ChargeableChars/Create/CreateChargeableCharConfigCommandValidator.cs

@@ -1,6 +1,7 @@
 using FluentValidation;
 using SIGCM2.Application.Common;
 using SIGCM2.Domain.Pricing.ChargeableChars;
+using SIGCM2.Domain.Pricing.WordCounter;
 
 namespace SIGCM2.Application.Pricing.ChargeableChars.Create;
 
@@ -19,7 +20,9 @@ public sealed class CreateChargeableCharConfigCommandValidator
             .NotEmpty()
             .WithMessage("Symbol no puede estar vacío.")
             .MaximumLength(4)
-            .WithMessage("Symbol no puede exceder 4 caracteres.");
+            .WithMessage("Symbol no puede exceder 4 caracteres.")
+            .Must(s => !WordCounterService.ContainsEmoji(s))
+            .WithMessage("Symbol no puede contener emojis. Usá símbolos ASCII o latinos (ej: $, %, !, ¡).");
 
         RuleFor(x => x.Category)
             .NotEmpty()
@@ -28,8 +31,8 @@ public sealed class CreateChargeableCharConfigCommandValidator
             .WithMessage($"Category inválida. Valores válidos: {string.Join(", ", new[] { ChargeableCharCategories.Currency, ChargeableCharCategories.Percentage, ChargeableCharCategories.Exclamation, ChargeableCharCategories.Question, ChargeableCharCategories.Other })}.");
 
         RuleFor(x => x.PricePerUnit)
-            .GreaterThan(0m)
-            .WithMessage("PricePerUnit debe ser > 0.");
+            .GreaterThanOrEqualTo(0m)
+            .WithMessage("PricePerUnit debe ser >= 0. Usá 0 para desactivar el cobro de este símbolo (opt-in billing).");
 
         RuleFor(x => x.ValidFrom)
             .GreaterThanOrEqualTo(today)

src/api/SIGCM2.Domain/Pricing/WordCounter/WordCounterService.cs

@@ -96,6 +96,22 @@ public sealed class WordCounterService
         return new WordCountResult(tokens.Length, counts);
     }
 
+    /// <summary>
+    /// Returns true if the given string contains any emoji codepoint.
+    /// Used by validators that must reject emojis in user-facing identifiers
+    /// (e.g. ChargeableCharConfig.Symbol) where the frontend blocker can be bypassed
+    /// by direct API calls. Shares the same IsEmojiRune Unicode ranges used by Count().
+    /// </summary>
+    public static bool ContainsEmoji(string? text)
+    {
+        if (string.IsNullOrEmpty(text)) return false;
+        foreach (var rune in text.EnumerateRunes())
+        {
+            if (IsEmojiRune(rune)) return true;
+        }
+        return false;
+    }
+
     /// <summary>
     /// Returns true if the given rune is an emoji codepoint.
     /// Covers: Extended Pictographics, Misc Symbols, Dingbats, Variation Selector-16, ZWJ.

src/web/tsconfig.json

@@ -6,6 +6,7 @@
   ],
   "compilerOptions": {
     "baseUrl": ".",
+    "ignoreDeprecations": "6.0",
     "paths": {
       "@/*": ["./src/*"]
     }