chore: Manticore als Standard — Xapian-Referenzen entfernt

- CLAUDE.md: Manticore statt Xapian, CGO_ENABLED=0, /var/lib/manticore/
- .claude/agents/manticore-admin.md: Neuer Projekt-Agent (Security, Backup, Reindex)
- .claude/agents/mailarchiv-architect.md: Xapian → Manticore Search

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

CLAUDE.md

@@ -1,12 +1,13 @@
 # archivmail
 
-Selbst gehostetes Mail-Archiv-System. Go-Backend + Next.js-Frontend + PostgreSQL + Xapian.
+Selbst gehostetes Mail-Archiv-System. Go-Backend + Next.js-Frontend + PostgreSQL + Manticore Search.
 
 ## Tech Stack
 
-- **Backend:** Go 1.23, CGO, Xapian (Volltext-Index)
+- **Backend:** Go 1.24, CGO_ENABLED=0, Manticore Search (Volltext-Index)
 - **Frontend:** Next.js 16 (App Router), TypeScript, Tailwind CSS, shadcn/ui
 - **Datenbank:** PostgreSQL (pgx/v5)
+- **Volltext-Index:** Manticore Search (MySQL-Protokoll, Port 9306)
 - **Deployment:** On-Premise (192.168.1.131), Systemd
 - **Auth:** JWT (httpOnly Cookie), bcrypt Cost 12
 
@@ -20,7 +21,7 @@ internal/
   audit/              Audit-Log (PostgreSQL + Flat-File)
   auth/               JWT-Authentifizierung
   imap/               IMAP-Import, Scheduler, Store
-  index/              Xapian-Wrapper (CGO), Async Worker
+  index/              Manticore Search (CGO-frei), Async Worker
   smtpd/              Eingebetteter SMTP-Daemon
   storage/            AES-256-GCM Dateispeicher + PostgreSQL-Metadaten
   userstore/          Benutzerverwaltung
@@ -35,8 +36,8 @@ src/
 ## Build & Deploy
 
 ```bash
-# Backend (CGO + Xapian zwingend erforderlich)
-CGO_ENABLED=1 go build -tags xapian -buildvcs=false -o archivmail ./cmd/archivmail/
+# Backend (kein CGO erforderlich)
+CGO_ENABLED=0 go build -buildvcs=false -o archivmail ./cmd/archivmail/
 
 # Frontend
 npm run build         # .next/standalone/ für Produktion
@@ -58,7 +59,7 @@ bash update.sh        # oder: curl ... | bash
 /etc/archivmail/config.yml   Hauptkonfiguration
 /etc/archivmail/keyfile      AES-256 Schlüssel (32 Bytes, nie committen)
 /var/archivmail/store/       Verschlüsselter E-Mail-Speicher
-/var/archivmail/xapian/      Xapian-Index
+/var/lib/manticore/          Manticore RT-Indizes (emails_global, emails_tenant_N)
 ```
 
 ## Dienste (Systemd)
@@ -66,5 +67,6 @@ bash update.sh        # oder: curl ... | bash
 ```bash
 systemctl status archivmail        # Go-Backend (Port 8080 + 2525)
 systemctl status archivmail-web    # Next.js-Frontend (Port 3000)
+systemctl status manticore         # Manticore Search (Port 9306, localhost)
 journalctl -u archivmail -f
 ```