chore: UI improvement in auth screens (#12573)

# Pull Request Template

## Type of change

### Screenshots

**Before**
<img width="694" height="767" alt="image"
src="https://github.com/user-attachments/assets/4a92816a-c13e-4750-88fc-b05fd6d05db6"
/>

<img width="395" height="690" alt="image"
src="https://github.com/user-attachments/assets/eac0f15c-7c0f-4c20-942d-fbebdaec903e"
/>

<img width="506" height="753" alt="image"
src="https://github.com/user-attachments/assets/b14bbf5a-5e0a-4ca5-91e2-dcc93b22ac26"
/>


**After**
<img width="694" height="767" alt="image"
src="https://github.com/user-attachments/assets/6984c8af-0e98-4688-bda4-fc5ceb3227ca"
/>

<img width="411" height="682" alt="image"
src="https://github.com/user-attachments/assets/3b0f2c13-e4ea-4edc-9146-3c017d301a13"
/>
<img width="509" height="682" alt="image"
src="https://github.com/user-attachments/assets/2090d3ed-36ef-4684-8185-3a0e6b1b0c15"
/>



## Checklist:

- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [ ] I have commented on my code, particularly in hard-to-understand
areas
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [x] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged and published in downstream
modules

app/javascript/v3/components/GoogleOauth/Button.vue

@@ -34,7 +34,7 @@ export default {
   <div class="flex flex-col">
     <a
       :href="getGoogleAuthUrl()"
-      class="inline-flex justify-center w-full px-4 py-3 bg-n-background dark:bg-n-solid-3 rounded-md shadow-sm ring-1 ring-inset ring-n-container dark:ring-n-container focus:outline-offset-0 hover:bg-n-alpha-2 dark:hover:bg-n-alpha-2"
+      class="inline-flex justify-center w-full px-4 py-3 bg-n-background dark:bg-n-solid-3 items-center rounded-md shadow-sm ring-1 ring-inset ring-n-container dark:ring-n-container focus:outline-offset-0 hover:bg-n-alpha-2 dark:hover:bg-n-alpha-2"
     >
       <span class="i-logos-google-icon h-6" />
       <span class="ml-2 text-base font-medium text-n-slate-12">

app/javascript/v3/views/auth/signup/components/Signup/Form.vue

@@ -237,16 +237,16 @@ export default {
       />
       <div
         id="password-requirements"
-        class="text-xs space-y-2 rounded-md px-4 py-3 outline outline-1 outline-n-weak bg-n-alpha-black2"
+        class="text-xs rounded-md px-4 py-3 outline outline-1 outline-n-weak bg-n-alpha-black2"
       >
-        <ul role="list" class="space-y-1 grid grid-cols-2">
+        <ul role="list" class="grid grid-cols-2 gap-1">
           <li
             v-for="item in passwordRequirementItems"
             :key="item.id"
-            class="flex gap-1 items-center"
+            class="inline-flex gap-1 items-start"
           >
             <Icon
-              class="flex-none flex-shrink-0 w-3"
+              class="flex-none flex-shrink-0 w-3 mt-0.5"
               :icon="item.met ? 'i-lucide-circle-check-big' : 'i-lucide-circle'"
               :class="item.met ? 'text-n-teal-10' : 'text-n-slate-10'"
             />

app/javascript/v3/views/login/Index.vue

@@ -15,6 +15,7 @@ import SimpleDivider from '../../components/Divider/SimpleDivider.vue';
 import FormInput from '../../components/Form/Input.vue';
 import GoogleOAuthButton from '../../components/GoogleOauth/Button.vue';
 import Spinner from 'shared/components/Spinner.vue';
+import Icon from 'dashboard/components-next/icon/Icon.vue';
 import NextButton from 'dashboard/components-next/button/Button.vue';
 import MfaVerification from 'dashboard/components/auth/MfaVerification.vue';
 
@@ -33,6 +34,7 @@ export default {
     NextButton,
     SimpleDivider,
     MfaVerification,
+    Icon,
   },
   props: {
     ssoAuthToken: { type: String, default: '' },
@@ -260,9 +262,12 @@ export default {
           <div v-if="showSamlLogin" class="mt-4 text-center">
             <router-link
               to="/app/login/sso"
-              class="inline-flex justify-center w-full px-4 py-3 bg-n-background dark:bg-n-solid-3 rounded-md shadow-sm ring-1 ring-inset ring-n-container dark:ring-n-container focus:outline-offset-0 hover:bg-n-alpha-2 dark:hover:bg-n-alpha-2"
+              class="inline-flex justify-center w-full px-4 py-3 items-center bg-n-background dark:bg-n-solid-3 rounded-md shadow-sm ring-1 ring-inset ring-n-container dark:ring-n-container focus:outline-offset-0 hover:bg-n-alpha-2 dark:hover:bg-n-alpha-2"
             >
-              <span class="i-lucide-key h-6 text-n-slate-11" />
+              <Icon
+                icon="i-lucide-lock-keyhole"
+                class="size-5 text-n-slate-11"
+              />
               <span class="ml-2 text-base font-medium text-n-slate-12">
                 {{ $t('LOGIN.SAML.LABEL') }}
               </span>