Stabilize auth flow and profile images

scripts/smoke.staging.env.example

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+TDC114_API_BASE=https://sso.hmac.kr
+TDC114_ORG_CONTEXT_API_BASE=https://sadmin.hmac.kr
+TDC114_ORG_CONTEXT_TENANT_SLUG=hanmac-family
+TDC114_BARON_KEY_ID=replace-with-staging-key-id
+TDC114_BARON_KEY_SECRET=replace-with-staging-key-secret
+TDC114_SMOKE_PHONE=010xxxxxxxx
+TDC114_SMOKE_AUTH_FLOW=link
+
+# Optional: set these only when the staging account has stable expected labels.
+# TDC114_SMOKE_EXPECTED_NAME=홍길동
+# TDC114_SMOKE_EXPECTED_TENANT_LABEL=IS3
+
+# Optional split mode:
+# TDC114_AUTH_API_BASE=https://sso.hmac.kr
+# TDC114_DIRECTORY_API_BASE=https://sadmin.hmac.kr
+# TDC114_ORGANIZATION_API_BASE=https://sadmin.hmac.kr