Refactor test cases for improved readability and consistency

- Updated test functions in various test files to enhance code clarity by formatting long lines and improving indentation.
- Adjusted assertions to use multi-line formatting for better readability.
- Added new test cases for theme settings API to ensure proper functionality.
- Ensured consistent use of line breaks and spacing across test files for uniformity.

templates/profile.html

@@ -0,0 +1,31 @@
+{% extends "base.html" %}
+
+{% block title %}Profile{% endblock %}
+
+{% block content %}
+<div class="container">
+    <h1>User Profile</h1>
+    <p>Username: <span id="profile-username"></span></p>
+    <p>Email: <span id="profile-email"></span></p>
+    <button id="edit-profile-button">Edit Profile</button>
+
+    <div id="edit-profile-form" style="display:none;">
+        <h2>Edit Profile</h2>
+        <form>
+            <div class="form-group">
+                <label for="edit-username">Username:</label>
+                <input type="text" id="edit-username" name="username">
+            </div>
+            <div class="form-group">
+                <label for="edit-email">Email:</label>
+                <input type="email" id="edit-email" name="email">
+            </div>
+            <div class="form-group">
+                <label for="edit-password">New Password:</label>
+                <input type="password" id="edit-password" name="password">
+            </div>
+            <button type="submit">Save Changes</button>
+        </form>
+    </div>
+</div>
+{% endblock %}