feat(backend): /api/protection/event akzeptiert Extension-Secret

- Extension-Auth-Path via x-extension-secret Header.
- Ermittelt userId anhand deviceId aus UserDevice.
- EXTENSION_SECRET in runtimeConfig + Infisical staging.

backend/nitro.config.ts

@@ -71,6 +71,9 @@ export default defineNitroConfig({
     // ─── Admin / Cron ────────────────────────────────────────────────────
     adminSecret: process.env.ADMIN_SECRET ?? "",
     cronSecret: process.env.CRON_SECRET ?? "",
+    // Shared secret for iOS Network Extensions to report protection-state
+    // transitions when the container app is not running.
+    extensionSecret: process.env.EXTENSION_SECRET ?? "",
     // Shared secret for AdGuard→Backend DoH-handshake (POST /api/devices/protected/handshake).
     // Set in Infisical as HANDSHAKE_SECRET before enabling AdGuard webhook.
     handshakeSecret: process.env.HANDSHAKE_SECRET ?? "",

backend/server/api/protection/event.post.ts

@@ -4,8 +4,10 @@ import {
   appendProtectionEventDeduped,
   type ProtectionSource,
 } from "../../db/protectionStateLog";
-import { upsertDeviceProtectionState } from "../../db/device-protection";
-import type { ProtectionType } from "../../db/device-protection";
+import {
+  upsertDeviceProtectionState,
+  type ProtectionType,
+} from "../../db/device-protection";
 
 const VALID_SOURCES: ProtectionSource[] = ["vpn", "mdm", "client"];
 
@@ -14,6 +16,17 @@ function sourceToProtectionType(source: ProtectionSource): ProtectionType {
   return "vpn";
 }
 
+async function resolveUserIdFromDeviceId(
+  deviceId: string,
+): Promise<string | null> {
+  const db = usePrisma();
+  const row = await db.userDevice.findUnique({
+    where: { deviceId },
+    select: { userId: true },
+  });
+  return row?.userId ?? null;
+}
+
 /**
  * POST /api/protection/event
  *
@@ -23,6 +36,9 @@ function sourceToProtectionType(source: ProtectionSource): ProtectionType {
  *   deviceId?: string   // optional, falls bekannt (z.B. native App)
  * }
  *
+ * Auth: Bearer <jwt> (native app) OR x-extension-secret: <secret> (iOS
+ * Network-Extension when the container app is not running).
+ *
  * Called from the native app (useProtectionState / lib/protection) when the
  * combined protection state transitions on↔off. The client deduplicates
  * locally (only fires on real transitions); the server deduplicates again
@@ -36,7 +52,6 @@ function sourceToProtectionType(source: ProtectionSource): ProtectionType {
  *         { success: true, written: false } if deduplicated (state unchanged).
  */
 export default defineEventHandler(async (event) => {
-  const user = await requireUser(event);
   const body = await readBody(event);
 
   if (typeof body?.active !== "boolean") {
@@ -47,13 +62,42 @@ export default defineEventHandler(async (event) => {
     ? (body.source as ProtectionSource)
     : "client";
 
-  const row = await appendProtectionEventDeduped(user.id, body.active, source);
+  let userId: string;
+
+  // ─── Extension auth path (iOS Network Extension) ────────────────────────────
+  const extensionSecret = getHeader(event, "x-extension-secret");
+  const config = useRuntimeConfig(event);
+  const expectedSecret = (config as any).extensionSecret as string | undefined;
+
+  if (extensionSecret && extensionSecret === expectedSecret && expectedSecret) {
+    const deviceId = body?.deviceId;
+    if (!deviceId || typeof deviceId !== "string") {
+      throw createError({
+        statusCode: 400,
+        message: "deviceId required for extension auth",
+      });
+    }
+    const resolved = await resolveUserIdFromDeviceId(deviceId);
+    if (!resolved) {
+      throw createError({
+        statusCode: 404,
+        message: "device not found",
+      });
+    }
+    userId = resolved;
+  } else {
+    // ─── Standard auth path (container app with JWT) ──────────────────────────
+    const user = await requireUser(event);
+    userId = user.id;
+  }
+
+  const row = await appendProtectionEventDeduped(userId, body.active, source);
 
   const deviceId = body?.deviceId ?? getHeader(event, "x-device-id") ?? null;
   if (deviceId && typeof deviceId === "string") {
     try {
       await upsertDeviceProtectionState(
-        user.id,
+        userId,
         deviceId,
         "ios",
         sourceToProtectionType(source),
@@ -63,7 +107,10 @@ export default defineEventHandler(async (event) => {
         "native-app",
       );
     } catch (err: any) {
-      console.error("[protection/event] device_protection_states upsert failed:", err?.message ?? err);
+      console.error(
+        "[protection/event] device_protection_states upsert failed:",
+        err?.message ?? err,
+      );
     }
   }