🧱 OAuth login infra

DysonNetwork.Sphere/appsettings.json

@@ -83,5 +83,19 @@
   },
   "GeoIp": {
     "DatabasePath": "./Keys/GeoLite2-City.mmdb"
+  },
+  "Oidc": {
+    "Google": {
+      "ClientId": "YOUR_GOOGLE_CLIENT_ID",
+      "ClientSecret": "YOUR_GOOGLE_CLIENT_SECRET",
+      "RedirectUri": "https://your-app.com/auth/callback/google"
+    },
+    "Apple": {
+      "ClientId": "YOUR_APPLE_CLIENT_ID",
+      "TeamId": "YOUR_APPLE_TEAM_ID",
+      "KeyId": "YOUR_APPLE_KEY_ID",
+      "PrivateKeyPath": "./apple_auth_key.p8",
+      "RedirectUri": "https://your-app.com/auth/callback/apple"
+    }
   }
-}
+}