feat(emails): zweisprachige E-Mail-Templates + Notification-Texte org-relativ

- email_utils/templates.magic_link_login_email + incident_notification_email
  nehmen jetzt lang Parameter (de | en).
- routers/auth.request_magic_link zieht Sprache aus der Org des Users und
  uebergibt sie ans Template.
- agents/orchestrator._send_email_notifications_for_incident lokalisiert
  ebenfalls und gibt lang an incident_notification_email durch.
- DB-Notification-Texte (refresh_summary, new_articles) sind in der
  Pipeline org-sprach-relativ (englische Variante: "3 new articles", etc.).
  Status-Change-Notifications: Codes (confirmed/contradicted) bleiben, FE
  uebersetzt sie in Phase 6.

Phase 5 von 8 (eng_demo / Org-Sprache).

src/agents/orchestrator.py

@@ -341,6 +341,10 @@ async def _send_email_notifications_for_incident(
     from email_utils.sender import send_email
     from email_utils.templates import incident_notification_email
     from config import MAGIC_LINK_BASE_URL
+    from services.org_settings import get_org_language
+
+    # Sprache der Org bestimmen (die Lage gehoert genau einer Org)
+    org_lang_iso = await get_org_language(db, tenant_id) if tenant_id else "de"
 
     # Alle Nutzer mit aktiven Abos fuer diese Lage laden
     cursor = await db.execute(
@@ -386,6 +390,7 @@ async def _send_email_notifications_for_incident(
             notifications=filtered_notifications,
             dashboard_url=dashboard_url,
             incident_type=incident_type,
+            lang=org_lang_iso,
         )
         try:
             await send_email(prefs["email"], subject, html)
@@ -1753,27 +1758,41 @@ class AgentOrchestrator:
                             },
                         }, visibility, created_by, tenant_id)
 
-                    # DB-Notifications erzeugen
+                    # DB-Notifications erzeugen (Texte org-sprach-relativ)
+                    is_en = output_language_iso == "en"
                     parts = []
-                    if new_count > 0:
-                        parts.append(f"{new_count} neue Meldung{'en' if new_count != 1 else ''}")
-                    if confirmed_count > 0:
-                        parts.append(f"{confirmed_count} bestätigt")
-                    if contradicted_count > 0:
-                        parts.append(f"{contradicted_count} widersprochen")
-                    summary_text = ", ".join(parts) if parts else "Keine neuen Entwicklungen"
+                    if is_en:
+                        if new_count > 0:
+                            parts.append(f"{new_count} new article{'s' if new_count != 1 else ''}")
+                        if confirmed_count > 0:
+                            parts.append(f"{confirmed_count} confirmed")
+                        if contradicted_count > 0:
+                            parts.append(f"{contradicted_count} contradicted")
+                        summary_text = ", ".join(parts) if parts else "No new developments"
+                        research_prefix = "Research"
+                        new_articles_msg = f"{new_count} new article{'s' if new_count != 1 else ''} found"
+                    else:
+                        if new_count > 0:
+                            parts.append(f"{new_count} neue Meldung{'en' if new_count != 1 else ''}")
+                        if confirmed_count > 0:
+                            parts.append(f"{confirmed_count} bestätigt")
+                        if contradicted_count > 0:
+                            parts.append(f"{contradicted_count} widersprochen")
+                        summary_text = ", ".join(parts) if parts else "Keine neuen Entwicklungen"
+                        research_prefix = "Recherche"
+                        new_articles_msg = f"{new_count} neue Meldung{'en' if new_count != 1 else ''} gefunden"
 
                     db_notifications = [{
                         "type": "refresh_summary",
                         "title": title,
-                        "text": f"Recherche: {summary_text}",
+                        "text": f"{research_prefix}: {summary_text}",
                         "icon": "warning" if contradicted_count > 0 else "success",
                     }]
                     if new_count > 0:
                         db_notifications.append({
                             "type": "new_articles",
                             "title": title,
-                            "text": f"{new_count} neue Meldung{'en' if new_count != 1 else ''} gefunden",
+                            "text": new_articles_msg,
                             "icon": "info",
                         })
                     for sc in status_changes: