feat(auth): интегрировать SSO auth-portal

JWT на backend, handoff/callback на UI, RBAC mm:*, AUTH_* в compose.

Co-authored-by: Cursor <[email protected]>

backend/src/lib/permissions.test.ts

@@ -0,0 +1,25 @@
+import assert from "node:assert/strict"
+import { hasPermission, permissionForRequest } from "./permissions.js"
+
+assert.equal(hasPermission(["mm:servers:write"], "mm:servers:read"), true)
+assert.equal(hasPermission(["mm:servers:admin"], "mm:servers:write"), true)
+assert.equal(hasPermission(["mm:servers:read"], "mm:servers:write"), false)
+
+assert.equal(
+  permissionForRequest("GET", "/api/servers"),
+  "mm:servers:read",
+)
+assert.equal(
+  permissionForRequest("POST", "/api/servers"),
+  "mm:servers:write",
+)
+assert.equal(
+  permissionForRequest("GET", "/api/system/database/backup"),
+  "mm:settings:admin",
+)
+assert.equal(
+  permissionForRequest("GET", "/api/unknown-thing"),
+  "mm:dashboard:read",
+)
+
+console.log("permissions.test.ts: ok")