Elevar cobertura de testes para 50%

[Copilot]

Test coverage was well below 50% across all metrics (statements ~45%, branches ~30%, functions ~38%), with large portions of configuration, utility, and CLI modules having zero coverage.

New test files

• testes/utilidades/gerador-expressoes.test.ts — Full coverage of all 13 GeradorExpressoes methods, including all 6 switch cases in gerarOperadorComparacao
• testes/infraestrutura/centro-configuracoes.test.ts — Tests for all ConfiguracaoX classes using mock components, all ConfiguracaoComum.definirValor branch paths, and CentroConfiguracoes AST parsing at 1/2/3-level nesting depths
• testes/interface-linha-comando/gerar.test.ts — Tests for obterTodosModelos, criarDiretorioSeNaoExiste, and criarDiretorioComIdSeNaoExiste with fs mocked
• testes/utilidades/autenticacao-callback.test.ts — Tests the JWT strategy verify callback (user found / not found) via a passport-jwt mock that captures the callback

Modified test files

• testes/infraestrutura/preprocessadores/foles.test.ts — Added coverage for the XML parse error path (catch), the no-cabeca path, and the cabeça (accented) fallback in the || branch

Bug fix

• infraestrutura/centro-configuracoes/configuracao-comum.ts — Fixed a crash in definirValor where the error message referenced instancia[proximaPropriedade].constructor.name on a property that doesn't exist (always undefined); corrected to instancia.constructor.name

Coverage results

Metric	Before	After
Statements	44.91%	64.42%
Branches	29.66%	51.45%
Functions	37.93%	66.66%
Lines	44.49%	64.23%

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