chore: auto-commit (97 archivos)

- .claude/CLAUDE.md
- .claude/agents/fn-recopilador/SKILL.md
- .claude/rules/INDEX.md
- .claude/rules/cpp_apps.md
- bash/functions/infra/build_cpp_windows.sh
- cpp/CMakeLists.txt
- cpp/PATTERNS.md
- cpp/framework/app_base.cpp
- cpp/framework/app_base.h
- dev/issues/README.md
- ...

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

functions/infra/smtp_connect.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"net"
 	"net/smtp"
+	"strconv"
 )
 
 // SMTPConnect establishes an authenticated SMTP connection using the given config.
@@ -16,7 +17,7 @@ import (
 // Returns an *smtp.Client ready to use with SMTPSend.
 // The caller is responsible for calling client.Quit() when done.
 func SMTPConnect(cfg SMTPConfig) (*smtp.Client, error) {
-	addr := fmt.Sprintf("%s:%d", cfg.Host, cfg.Port)
+	addr := net.JoinHostPort(cfg.Host, strconv.Itoa(cfg.Port))
 
 	switch cfg.TLSMode {
 	case "tls":