Error reductions found via analytics (#3351)

# Description of Changes

Please provide a summary of the changes, including:

- What was changed
- Why the change was made
- Any challenges encountered

Closes #(issue_number)

---

## Checklist

### General

- [ ] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [ ] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/DeveloperGuide.md)
(if applicable)
- [ ] I have read the [How to add new languages to
Stirling-PDF](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/HowToAddNewLanguage.md)
(if applicable)
- [ ] I have performed a self-review of my own code
- [ ] My changes generate no new warnings

### Documentation

- [ ] I have updated relevant docs on [Stirling-PDF's doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
(if functionality has heavily changed)
- [ ] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

### UI Changes (if applicable)

- [ ] Screenshots or videos demonstrating the UI changes are attached
(e.g., as comments or direct attachments in the PR)

### Testing (if applicable)

- [ ] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/DeveloperGuide.md#6-testing)
for more details.

src/main/resources/templates/fragments/navbar.html

@@ -143,7 +143,7 @@
             </a>
             <div class="dropdown-menu dropdown-menu-tp" aria-labelledby="languageDropdown">
               <div class="dropdown-menu-wrapper px-xl-2 px-2">
-                <div class="scrollable-y lang_dropdown-mw scalable-languages-container">
+                <div id="languageSelection" class="scrollable-y lang_dropdown-mw scalable-languages-container">
                   <th:block th:insert="~{fragments/languages :: langs}"></th:block>
                 </div>
               </div>

src/main/resources/templates/login.html

@@ -143,7 +143,7 @@
             </button>
             <div class="dropdown-menu" aria-labelledby="languageDropdown">
               <!-- Here's where the fragment will be included -->
-              <div class="scrollable-y">
+              <div id="languageSelection" class="scrollable-y" >
               <th:block th:replace="~{fragments/languages :: langs}"></th:block>
               </div>
             </div>

src/main/resources/templates/misc/add-image.html

@@ -27,7 +27,7 @@
             </div>
             <script type="module" th:src="@{'/pdfjs-legacy/pdf.mjs'}"></script>
             <script type="module" th:src="@{'/js/pages/add-image.js'}"></script>
-            <div class="tab-group show-on-file-selected">
+            <div class="show-on-file-selected">
               <div
                 th:replace="~{fragments/common :: fileSelector(name='image-upload', disableMultipleFiles=false, multipleInputsForSingleRequest=true, accept='image/*', inputText=#{imgPrompt})}">
               </div>