feat: WireGuard (server + client + peers + QR) + shared UI components

WireGuard
---------
* Migration 0013: wireguard_interfaces (server|client mode, key envelope-
  encrypted) + wireguard_peers (per-server roster). Drop old empty
  0005-Schema (Option-A peer_type, kein Iface-FK), neuer Aufbau mit
  zwei Tabellen + FK.
* internal/services/secrets: Box mit AES-256-GCM, Master-Key in
  /var/lib/edgeguard/.master_key (lazy-create, 0600). Sealed/Open
  für PrivateKey + PSK.
* internal/services/wireguard: KeyGen (Curve25519 mit clamping),
  PublicFromPrivate (für Import), InterfacesRepo, PeersRepo, Importer
  (parst /etc/wireguard/*.conf, server vs. client heuristisch nach
  ListenPort + Peer-Anzahl).
* internal/wireguard: Renderer schreibt /etc/edgeguard/wireguard/<iface>.conf
  (0600), restartet wg-quick@<iface> via sudo (sudoers im postinst
  erweitert). Idempotent — re-render nur wenn content geändert.
* internal/handlers/wireguard.go: REST CRUD für interfaces+peers,
  /generate-keypair, /peers/:id/config (text/plain wg-quick conf),
  /peers/:id/qr (PNG via go-qrcode). Auto-reload nach Mutation.
* edgeguard-ctl wg-import [--path /etc/wireguard]: liest existierende
  conf-Files in die DB. Idempotent (überspringt vorhandene Iface-Namen).

Shared UI components (proxy-lb-waf design pattern)
--------------------------------------------------
* PageHeader: icon + title + subtitle + extras row, einheitlich oben
  auf jeder Page.
* ActionButtons: Edit + Delete combo mit Popconfirm + Tooltip.
* StatusDot: AntD Badge pattern statt "Yes/No" — schneller scanbar
  in dichten Tabellen.
* DataTable: pageSizeOptions [20,50,100,200] + extraActions-Alias +
  optional renderMobileCard für Card-Liste auf < md Breakpoint.
* enterprise.css: .page-header* + .datatable-toolbar Klassen.

Frontend WireGuard
------------------
* /vpn/wireguard mit zwei Tabs (Server / Client) im neuen Pattern.
* Server-Tab: Modal mit Generate-Keypair-Toggle, Peer-Roster im
  Drawer per Server. Pro Peer: QR-Code-Modal + .conf-Download.
* Client-Tab: Upstream-Card im Modal, full-tunnel-Default
  (0.0.0.0/0,::/0), Keepalive 25.
* i18n DE/EN für wg.* Block + common.* Erweiterung.

Misc
----
* Sidebar: WireGuard unter Security-Sektion.
* Nav-i18n: "Firewall (v2)" → "Firewall".
* Version 1.0.8 → 1.0.11.

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

cmd/edgeguard-ctl/wg_import.go

@@ -0,0 +1,62 @@
+package main
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"os"
+	"time"
+
+	"git.netcell-it.de/projekte/edgeguard-native/internal/database"
+	"git.netcell-it.de/projekte/edgeguard-native/internal/services/secrets"
+	"git.netcell-it.de/projekte/edgeguard-native/internal/services/wireguard"
+)
+
+// cmdWGImport reads /etc/wireguard/*.conf (or a custom dir via
+// --path) and translates each [Interface]+[Peer] block into rows in
+// wireguard_interfaces / wireguard_peers. Idempotent: ifaces with a
+// name that already exists in the DB are skipped (no overwrite).
+//
+// Use after a fresh EdgeGuard install on a box that already had a
+// hand-rolled WireGuard setup — keeps existing tunnels live across
+// the migration. After import, run `edgeguard-ctl render-config` to
+// re-emit the conf files under /etc/edgeguard/wireguard/ and start
+// the wg-quick@ units. The original /etc/wireguard files are left
+// in place for fallback.
+func cmdWGImport(args []string) int {
+	fs := flag.NewFlagSet("wg-import", flag.ExitOnError)
+	path := fs.String("path", "/etc/wireguard", "directory holding *.conf files")
+	if err := fs.Parse(args); err != nil {
+		return 2
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
+	defer cancel()
+
+	pool, err := database.Open(ctx, database.ConnStringFromEnv())
+	if err != nil {
+		fmt.Fprintln(os.Stderr, "wg-import: open db:", err)
+		return 1
+	}
+	defer pool.Close()
+
+	box := secrets.New("")
+	im := wireguard.NewImporter(
+		wireguard.NewInterfacesRepo(pool),
+		wireguard.NewPeersRepo(pool),
+		box,
+	)
+	res, err := im.ImportDir(ctx, *path)
+	if err != nil {
+		fmt.Fprintln(os.Stderr, "wg-import:", err)
+		return 1
+	}
+	fmt.Printf("wg-import: %d ifaces added, %d peers added\n", res.IfacesAdded, res.PeersAdded)
+	for _, s := range res.Skipped {
+		fmt.Printf("  skipped: %s\n", s)
+	}
+	if res.IfacesAdded > 0 {
+		fmt.Println("\nNext: edgeguard-ctl render-config (re-emits configs + starts wg-quick@<iface>)")
+	}
+	return 0
+}