chore(web): unique ID generation (#9932)

* chore(web): automatically generate unique IDs

* fix: revert changes to Slider

* chore: add test for id store

web/src/routes/(user)/people/+page.svelte

@@ -453,7 +453,7 @@
   {/if}
 
   {#if showChangeNameModal}
-    <FullScreenModal id="change-name-modal" title="Change name" onClose={() => (showChangeNameModal = false)}>
+    <FullScreenModal title="Change name" onClose={() => (showChangeNameModal = false)}>
       <form on:submit|preventDefault={submitNameChange} autocomplete="off" id="change-name-form">
         <div class="flex flex-col gap-2">
           <label class="immich-form-label" for="name">Name</label>

web/src/routes/admin/user-management/+page.svelte

@@ -154,7 +154,6 @@
 
       {#if shouldShowPasswordResetSuccess}
         <ConfirmDialog
-          id="password-reset-success-modal"
           title="Password reset success"
           confirmText="Done"
           onConfirm={() => (shouldShowPasswordResetSuccess = false)}