feat(web,a11y): standardize the FullScreenModal UI (#8566)

* feat(web,a11y): standardize the FullScreenModal look

* consistent header, padding, close button, and radius as BaseModal
* vertically stacking ConfirmDialogue CTA buttons in narrow screens
* adding aria-modal tags for screen reader
* add viewport-specific height limits on modals, to enable scrolling
* prevent focus from being hidden under sticky content in modals
* standardize FullScreenModal widths using a Prop

* wip: consistent padding with header

* fix: alignment on "create user" and "edit user" modals

* fix: horizontal modal content alignment

* fix: create user CTA buttons

* chore: remove unnecessary warning

---------

Co-authored-by: Jason Rasmussen <jrasm91@gmail.com>

web/src/lib/components/forms/library-import-path-form.svelte

@@ -1,6 +1,5 @@
 <script lang="ts">
   import { createEventDispatcher } from 'svelte';
-  import Icon from '$lib/components/elements/icon.svelte';
   import Button from '../elements/buttons/button.svelte';
   import FullScreenModal from '../shared-components/full-screen-modal.svelte';
   import { mdiFolderSync } from '@mdi/js';
@@ -31,45 +30,30 @@
   const handleSubmit = () => dispatch('submit', { importPath });
 </script>
 
-<FullScreenModal onClose={handleCancel}>
-  <div
-    class="w-[500px] max-w-[95vw] rounded-3xl border bg-immich-bg p-4 py-8 shadow-sm dark:border-immich-dark-gray dark:bg-immich-dark-gray dark:text-immich-dark-fg"
-  >
-    <div
-      class="flex flex-col place-content-center place-items-center gap-4 px-4 text-immich-primary dark:text-immich-dark-primary"
-    >
-      <Icon path={mdiFolderSync} size="4em" />
-      <h1 class="text-2xl font-medium text-immich-primary dark:text-immich-dark-primary">
-        {title}
-      </h1>
+<FullScreenModal id="library-import-path-modal" {title} icon={mdiFolderSync} onClose={handleCancel}>
+  <form on:submit|preventDefault={() => handleSubmit()} autocomplete="off">
+    <p class="py-5 text-sm">
+      Specify a folder to import. This folder, including subfolders, will be scanned for images and videos.
+    </p>
+
+    <div class="my-4 flex flex-col gap-2">
+      <label class="immich-form-label" for="path">Path</label>
+      <input class="immich-form-input" id="path" name="path" type="text" bind:value={importPath} />
     </div>
 
-    <form on:submit|preventDefault={() => handleSubmit()} autocomplete="off">
-      <p class="p-5 text-sm">
-        Specify a folder to import. This folder, including subfolders, will be scanned for images and videos. Note that
-        you are only allowed to import paths inside of your account's external path, configured in the administrative
-        settings.
-      </p>
+    <div class="mt-8 flex w-full gap-4">
+      <Button color="gray" fullwidth on:click={() => handleCancel()}>{cancelText}</Button>
+      {#if isEditing}
+        <Button color="red" fullwidth on:click={() => dispatch('delete')}>Delete</Button>
+      {/if}
 
-      <div class="m-4 flex flex-col gap-2">
-        <label class="immich-form-label" for="path">Path</label>
-        <input class="immich-form-input" id="path" name="path" type="text" bind:value={importPath} />
-      </div>
+      <Button type="submit" disabled={!canSubmit} fullwidth>{submitText}</Button>
+    </div>
 
-      <div class="mt-8 flex w-full gap-4 px-4">
-        <Button color="gray" fullwidth on:click={() => handleCancel()}>{cancelText}</Button>
-        {#if isEditing}
-          <Button color="red" fullwidth on:click={() => dispatch('delete')}>Delete</Button>
-        {/if}
-
-        <Button type="submit" disabled={!canSubmit} fullwidth>{submitText}</Button>
-      </div>
-
-      <div class="mt-8 flex w-full gap-4 px-4">
-        {#if isDuplicate}
-          <p class="text-red-500 text-sm">This import path already exists.</p>
-        {/if}
-      </div>
-    </form>
-  </div>
+    <div class="mt-8 flex w-full gap-4">
+      {#if isDuplicate}
+        <p class="text-red-500 text-sm">This import path already exists.</p>
+      {/if}
+    </div>
+  </form>
 </FullScreenModal>