feat: register T1 (pending, verify)

features/runtime_settings_injection.qa.md

@@ -83,9 +83,10 @@ Package: `test` (black-box).
     constructor signature changes.
 
 ## Mailer
-16. Construct `mailer.NewMailRepository(config.SmtpSettings{Email:
-    "notify@example.com", Host: "smtp.example.com", Port: 587, Password:
-    "unused-in-test"})` with no `SMTP_*` environment variable set (do not
+16. Construct `mailer.NewMailRepository(config.SmtpSettings{Login:
+    "smtp-login@example.com", Sender: "notify@example.com", Host:
+    "smtp.example.com", Port: 587, Password: "unused-in-test"})` with no
+    `SMTP_*` environment variable set (do not
     call `t.Setenv` for any `SMTP_*` name in this test). Assert construction
     does not panic and does not error — this is the only automated
     assertion available, since exercising `Send` requires a real SMTP dialog
@@ -95,7 +96,8 @@ Package: `test` (black-box).
 
 ## Manual verification (not exercised by the Go test)
 - Real SMTP send: run `task dev` (or a built binary) with a real `.env`
-  populated with SMTP_EMAIL/SMTP_PASSWORD/SMTP_HOST/SMTP_PORT, trigger a
+  populated with SMTP_LOGIN/SMTP_SENDER/SMTP_PASSWORD/SMTP_HOST/SMTP_PORT,
+  trigger a
   flow that calls `SendMailUseCase.SendMail`, and confirm the message
   actually leaves via the injected host/port/credentials, and that changing
   those env vars requires a process restart to take effect (there is no