fix(login): keep submit button disabled/loading during password set r… (#12429)

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# Which Problems Are Solved

- On Login V2 after a user sets their password during the invite or
reset-password flows and clicks continue,
there is a few seconds delay before the redirect occurs because no
loading spinner is visible on the button
during this delay users assume nothing happened and click continue
again.
- Clicking the button again starts a duplicate form submission. Since
the first request was already fired the second request triggers an error
right before the redirect from the first request completion creating a
bad user experience

# How the Problems Are Solved

- Kept the `loading` state active `true` throughout the lifeline of the
request which includes the 2-second database consistency delay and the
subsequent `sendPassword` verification request.
- Added `setLoading(false)` calls only in early-return error handling
blocks and at the end of the
redirection flow ensuring the button remains disabled and shows the
spinner until the redirect happens.

# Additional Changes

- None

# Additional Context

- Solves  #12416

Co-authored-by: Max Peintner <[email protected]>

apps/login/src/components/set-password-form.tsx

@@ -101,21 +101,20 @@ export function SetPasswordForm({
       payload = { ...payload, code: values.code };
     }
 
-    const changeResponse = await changePassword(payload)
+    const changeResponse = await changePassword(payload).catch(() => {
-      .catch(() => {
+      setError(t("set.errors.couldNotSetPassword"));
-        setError(t("set.errors.couldNotSetPassword"));
+      setLoading(false);
-        return;
+      return;
-      })
+    });
-      .finally(() => {
-        setLoading(false);
-      });
 
     if (changeResponse && "error" in changeResponse) {
+      setLoading(false);
       setError(changeResponse.error);
       return;
     }
 
     if (!changeResponse) {
+      setLoading(false);
       setError(t("set.errors.couldNotSetPassword"));
       return;
     }
@@ -138,15 +137,13 @@ export function SetPasswordForm({
         password: { password: values.password },
       }),
       requestId,
-    })
+    }).catch(() => {
-      .catch(() => {
+      setError(t("set.errors.couldNotVerifyPassword"));
-        setError(t("set.errors.couldNotVerifyPassword"));
+      setLoading(false);
-        return;
+      return;
-      })
+    });
-      .finally(() => {
-        setLoading(false);
-      });
 
+    setLoading(false);
     handleServerActionResponse(passwordResponse as any, router, setSamlData, setError);
 
     return;