fix(auth): Correct API paths and resolve build/type errors in tests and config

frontend/src/services/auth.test.ts

@@ -1,9 +1,11 @@
-import { describe, it, expect, vi, beforeEach } from "vitest"
+import { describe, it, expect, vi, beforeEach, type MockInstance } from "vitest"
 import axios from "axios"
 import { AuthService } from "./auth"
 
 vi.mock("axios")
-const mockedAxios = axios as jest.Mocked<typeof axios>
+const mockedAxios = axios as unknown as {
+  post: MockInstance<typeof axios.post>
+}
 
 describe("AuthService", () => {
   beforeEach(() => {
@@ -22,9 +24,16 @@ describe("AuthService", () => {
 
     const result = await AuthService.login("test@example.com", "password123")
 
-    expect(mockedAxios.post).toHaveBeenCalledWith("/api/auth/login", expect.any(FormData))
+    expect(mockedAxios.post).toHaveBeenCalledWith("/auth/login", expect.any(FormData))
+    
+    // Validate FormData content
+    const formData = (mockedAxios.post.mock.calls[0][1] as FormData)
+    expect(formData.get("username")).toBe("test@example.com")
+    expect(formData.get("password")).toBe("password123")
+
     expect(result.access_token).toBe("fake-jwt-token")
     expect(localStorage.getItem("token")).toBe("fake-jwt-token")
+    expect(AuthService.isAuthenticated()).toBe(true)
   })
 
   it("handles login failure", async () => {
@@ -32,6 +41,7 @@ describe("AuthService", () => {
 
     await expect(AuthService.login("test@example.com", "wrong")).rejects.toThrow("Invalid credentials")
     expect(localStorage.getItem("token")).toBeNull()
+    expect(AuthService.isAuthenticated()).toBe(false)
   })
 
   it("successfully registers a user", async () => {
@@ -45,7 +55,7 @@ describe("AuthService", () => {
 
     const result = await AuthService.register("test@example.com", "password123")
 
-    expect(mockedAxios.post).toHaveBeenCalledWith("/api/auth/register", {
+    expect(mockedAxios.post).toHaveBeenCalledWith("/auth/register", {
       email: "test@example.com",
       password: "password123",
     })
@@ -54,7 +64,9 @@ describe("AuthService", () => {
 
   it("logs out and clears the token", () => {
     localStorage.setItem("token", "some-token")
+    expect(AuthService.isAuthenticated()).toBe(true)
     AuthService.logout()
     expect(localStorage.getItem("token")).toBeNull()
+    expect(AuthService.isAuthenticated()).toBe(false)
   })
 })