Rafforza i requisiti password con regole di complessità di mercato.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/spec/requests/auth_spec.rb

@@ -1,10 +1,10 @@
 require "rails_helper"
 
 RSpec.describe "Auth API", type: :request do
-  let!(:user) { User.create!(email: "test@example.com", name: "Test", password: "password123", role: "coach") }
+  let!(:user) { User.create!(email: "test@example.com", name: "Test", password: "Password123", role: "coach") }
 
   it "logs in with valid credentials" do
-    post "/api/v1/auth/login", params: { email: user.email, password: "password123" }
+    post "/api/v1/auth/login", params: { email: user.email, password: "Password123" }
     expect(response).to have_http_status(:ok)
     expect(JSON.parse(response.body)).to have_key("access_token")
   end