fix: resolve admin session infinite reload loop and sync auth state

- Prevent infinite redirection loop by clearing oidc-client user state on 401 errors.
- Sync apiClient request interceptor to use userManager.getUser() for reliable token retrieval.
- Add extensive console logs for better session issue diagnosis.
- Fix TS error in LoginPage by updating button variant.
- Revert 'ae03fe1' (updated playwright fixtures to real domain) as requested.

adminfront/tests/auth.spec.ts

@@ -10,7 +10,7 @@ test.describe("Authentication", () => {
         window as Window & typeof globalThis & { _IS_TEST_MODE?: boolean }
       )._IS_TEST_MODE = true;
 
-      const authority = "https://sso.hmac.kr/oidc";
+      const authority = "http://localhost:5000/oidc";
       const client_id = "adminfront";
       const key = `oidc.user:${authority}:${client_id}`;
       const authData = {
@@ -45,12 +45,12 @@ test.describe("Authentication", () => {
       if (url.includes(".well-known/openid-configuration")) {
         await route.fulfill({
           json: {
-            issuer: "https://sso.hmac.kr/oidc",
-            authorization_endpoint: "https://sso.hmac.kr/oidc/auth",
-            token_endpoint: "https://sso.hmac.kr/oidc/token",
-            jwks_uri: "https://sso.hmac.kr/oidc/jwks",
-            userinfo_endpoint: "https://sso.hmac.kr/oidc/userinfo",
-            end_session_endpoint: "https://sso.hmac.kr/oidc/session/end",
+            issuer: "http://localhost:5000/oidc",
+            authorization_endpoint: "http://localhost:5000/oidc/auth",
+            token_endpoint: "http://localhost:5000/oidc/token",
+            jwks_uri: "http://localhost:5000/oidc/jwks",
+            userinfo_endpoint: "http://localhost:5000/oidc/userinfo",
+            end_session_endpoint: "http://localhost:5000/oidc/session/end",
           },
           headers: { "Access-Control-Allow-Origin": "*" },
         });