Linking an existing account to Google falls back to unstyled Keycloak pages

[saqibmanan]

What: After "Existing account found" → Continue with Google, users get the default "Link Google" email-verification page (orange links, raw realm name), then the email link. The design goes straight to "Account verified".
Why it matters: An off-brand, confusing step for every existing user who adopts Google sign-in.
Fix: not fixed — theme login-idp-link-email.ftl, and decide whether the first-broker-login flow should verify by email or auto-link trusted Google emails.

[saqibmanan]

Repro: existing password account x@gmail.com, never used Google → Continue with Google with the same email.

Observed: "Existing account found" (custom, matches design) → Continue with Google → default page titled "Link Google": "You need to verify your email address to link your account with Google. An email with instructions to link Google account … with your account has been sent to you." Orange Click here links. Email subject "Link Google"; its link completes the link and signs in.
Expected (design): straight to "Account verified".