add manual/api/ssh Plesk-Backends, Minimal-PDF, --pdf-only und GUI-Verbesserungen

- PLESK_BACKEND={manual,api,ssh}: manual als Default für Shared Hosts,
  api unverändert, ssh ruft `plesk bin mail` per paramiko auf.
- POP3_PORT default 995, POP3_SSL mit Auto-Erkennung anhand Port.
- Kerio: User wird mit mayChangePassword=False angelegt.
- Zusätzliche Minimal-PDF (nur Email + Cloud) pro Konto + Sammel-Variante,
  IMAP-Port konfigurierbar.
- CLI-Flag --pdf-only und entsprechender GUI-Button "📄 Nur PDF".
- GUI: Lösch-Button "✕ löschen" sichtbarer, letzte Zeile löschbar.
- PDFs sind kunden-tauglich (kein Status-Block, kein ACHTUNG-Hinweis);
  Anlage-Status separat in _admin_report_<ts>.txt.
- README dokumentiert die Skip-Logik pro Dienst und ihre Caveats.

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

pdf.py

@@ -31,7 +31,8 @@ def _section(title: str, rows, col_widths=(5 * cm, 11 * cm)):
     return elements
 
 
-def _build_user_section(account: Account, smtp_port: int, pop_port: int):
+def _build_user_section(account: Account, smtp_port: int,
+                         pop_port: int, pop_ssl: bool):
     styles = getSampleStyleSheet()
     elements = [
         Paragraph(f"Zugangsdaten – {account.vollname}", styles["Title"]),
@@ -47,6 +48,7 @@ def _build_user_section(account: Account, smtp_port: int, pop_port: int):
         ("Hinweis", "Anmeldung nur am Mailserver – keine Plesk-Webinterface-Anmeldung."),
     ])
 
+    pop_proto = "SSL" if pop_ssl else "unverschlüsselt"
     elements += _section("Kerio Connect (Hauptmailkonto)", [
         ("Webmail", f"https://{account.keriohost}/webmail/"),
         ("Benutzername", account.emailadresse),
@@ -54,7 +56,7 @@ def _build_user_section(account: Account, smtp_port: int, pop_port: int):
         ("SMTP-Server (Versand)", f"{account.keriohost}:{smtp_port} (SSL)"),
         ("IMAP/POP-Server",       f"{account.keriohost}"),
         ("POP3-Sammler",
-         f"holt automatisch von {account.pleskhost}:{pop_port} (SSL), "
+         f"holt automatisch von {account.pleskhost}:{pop_port} ({pop_proto}), "
          f"behält 14 Tage auf dem Server"),
     ])
 
@@ -71,18 +73,18 @@ def _build_user_section(account: Account, smtp_port: int, pop_port: int):
 
 
 def write_user_pdf(path: Path, account: Account,
-                    smtp_port: int, pop_port: int) -> None:
+                    smtp_port: int, pop_port: int, pop_ssl: bool) -> None:
     doc = SimpleDocTemplate(
         str(path), pagesize=A4,
         leftMargin=2 * cm, rightMargin=2 * cm,
         topMargin=2 * cm, bottomMargin=2 * cm,
         title=f"Zugangsdaten {account.vollname}",
     )
-    doc.build(_build_user_section(account, smtp_port, pop_port))
+    doc.build(_build_user_section(account, smtp_port, pop_port, pop_ssl))
 
 
 def write_combined_pdf(path: Path, accounts: List[Account],
-                        smtp_port: int, pop_port: int) -> None:
+                        smtp_port: int, pop_port: int, pop_ssl: bool) -> None:
     doc = SimpleDocTemplate(
         str(path), pagesize=A4,
         leftMargin=2 * cm, rightMargin=2 * cm,
@@ -91,7 +93,56 @@ def write_combined_pdf(path: Path, accounts: List[Account],
     )
     flow = []
     for i, acc in enumerate(accounts):
-        flow += _build_user_section(acc, smtp_port, pop_port)
+        flow += _build_user_section(acc, smtp_port, pop_port, pop_ssl)
+        if i < len(accounts) - 1:
+            flow.append(PageBreak())
+    doc.build(flow)
+
+
+# ---------- Minimal-PDF (nur Email + Cloud, ohne Plesk/POP3-Sammler) ----------
+
+def _build_minimal_section(account: Account, smtp_port: int, imap_port: int):
+    styles = getSampleStyleSheet()
+    elements = [
+        Paragraph(f"Zugangsdaten – {account.vollname}", styles["Title"]),
+        Spacer(1, 0.4 * cm),
+    ]
+    elements += _section("Email", [
+        ("Emailadresse", account.emailadresse),
+        ("Kennwort", account.kerioemailkennwort),
+        ("SMTP-Server", f"{account.keriohost}:{smtp_port} (SSL)"),
+        ("IMAP-Server", f"{account.keriohost}:{imap_port} (SSL)"),
+    ])
+    elements += _section("Cloud", [
+        ("Cloud URL", f"https://{account.nextcloudhost}"),
+        ("Benutzername", account.nextcloud_username),
+        ("Kennwort", account.nextcloudkennwort),
+    ])
+    return elements
+
+
+def write_user_minimal_pdf(path: Path, account: Account,
+                            smtp_port: int, imap_port: int) -> None:
+    doc = SimpleDocTemplate(
+        str(path), pagesize=A4,
+        leftMargin=2 * cm, rightMargin=2 * cm,
+        topMargin=2 * cm, bottomMargin=2 * cm,
+        title=f"Zugangsdaten {account.vollname}",
+    )
+    doc.build(_build_minimal_section(account, smtp_port, imap_port))
+
+
+def write_combined_minimal_pdf(path: Path, accounts: List[Account],
+                                smtp_port: int, imap_port: int) -> None:
+    doc = SimpleDocTemplate(
+        str(path), pagesize=A4,
+        leftMargin=2 * cm, rightMargin=2 * cm,
+        topMargin=2 * cm, bottomMargin=2 * cm,
+        title="Zugangsdaten minimal (Sammel-PDF)",
+    )
+    flow = []
+    for i, acc in enumerate(accounts):
+        flow += _build_minimal_section(acc, smtp_port, imap_port)
         if i < len(accounts) - 1:
             flow.append(PageBreak())
     doc.build(flow)