fix(messaging): test email + EmailLog show effective config, not stale env

Two display bugs where admin-facing email diagnostics reported the
.env-level config even when database overrides were in effect — so a
prod admin who switched from SendGrid (.env) to SMTP via /admin/settings
would receive a test email whose body still said "Provider: sendgrid"
and "From: noreply@wizard.lu", even though the actual From header used
the DB-overridden address. Confusing, and erodes trust in the page that
exists specifically to verify the setup.

- admin_settings.send_test_email: read get_effective_email_config(db)
  and display its provider + from_email in the test email's body. Also
  use the effective provider when stamping the audit-log row.
- email_service: in the "template not found" EmailLog branch, record
  the effective from_email / from_name / provider from
  self._platform_config (already populated correctly by __init__),
  instead of falling back to the env-only settings.email_*.

Verified by importing both modules; pure plumbing fix, no schema or
behavior change for callers.

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

app/modules/core/routes/api/admin_settings.py

@@ -656,10 +656,16 @@ def send_test_email(
     """
     Send a test email using the platform email configuration.
 
-    This tests the email provider configuration from environment variables.
+    Reports the *effective* config — DB overrides if any, else .env. The
+    test email's body must match what actually got used to send it,
+    otherwise admins can't trust the page they're testing from.
     """
     from app.modules.messaging.services.email_service import EmailService
 
+    effective = get_effective_email_config(db)
+    eff_provider = effective.get("provider", app_settings.email_provider)
+    eff_from = effective.get("from_email", app_settings.email_from_address)
+
     try:
         email_service = EmailService(db)
 
@@ -676,13 +682,13 @@ def send_test_email(
                 <p>If you received this email, your email settings are working correctly!</p>
                 <hr style="border: none; border-top: 1px solid #e5e7eb; margin: 20px 0;">
                 <p style="color: #6b7280; font-size: 12px;">
-                    Provider: {app_settings.email_provider}<br>
+                    Provider: {eff_provider}<br>
-                    From: {app_settings.email_from_address}
+                    From: {eff_from}
                 </p>
             </body>
             </html>
             """,
-            body_text=f"Test email from Orion platform.\n\nProvider: {app_settings.email_provider}\nFrom: {app_settings.email_from_address}",
+            body_text=f"Test email from Orion platform.\n\nProvider: {eff_provider}\nFrom: {eff_from}",
             is_platform_email=True,
         )
 
@@ -695,7 +701,7 @@ def send_test_email(
                 action="send_test_email",
                 target_type="email",
                 target_id=request.to_email,
-                details={"provider": app_settings.email_provider},
+                details={"provider": eff_provider},
             )
             db.commit()
 

app/modules/messaging/services/email_service.py

@@ -1317,16 +1317,18 @@ class EmailService:
         if not resolved:
             logger.error(f"Email template not found: {template_code} ({resolved_language})")
             # Create failed log entry
+            # Use the *effective* config so the audit row reflects what the
+            # admin actually configured (DB overrides win over .env).
             log = EmailLog(
                 template_code=template_code,
                 recipient_email=to_email,
                 recipient_name=to_name,
                 subject=f"[Template not found: {template_code}]",
-                from_email=settings.email_from_address,
+                from_email=self._platform_config.get("from_email", settings.email_from_address),
-                from_name=settings.email_from_name,
+                from_name=self._platform_config.get("from_name", settings.email_from_name),
                 status=EmailStatus.FAILED.value,
                 error_message=f"Template not found: {template_code} ({resolved_language})",
-                provider=settings.email_provider,
+                provider=self._platform_config.get("provider", settings.email_provider),
                 store_id=store_id,
                 user_id=user_id,
                 related_type=related_type,