Remove unused templates for newsletter creation, settings, and submissions; update unsubscribe confirmation link; add tests for email templates API.

static/css/styles.css

@@ -3,7 +3,9 @@
 /* Base styles */
 body {
   font-family: Arial, sans-serif;
-  margin: 20px;
+  max-width: 1200px;
+  margin: 0 auto;
+  padding: 20px;
   background-color: #f9f9f9;
   color: #333;
 }
@@ -76,21 +78,32 @@ button:hover,
 .btn:hover {
   background-color: #0056b3;
 }
-
 .btn-secondary {
   background-color: #6c757d;
 }
-
 .btn-secondary:hover {
   background-color: #545b62;
 }
-
 .btn-danger {
   background-color: #dc3545;
 }
-
 .btn-danger:hover {
-  background-color: #c82333;
+  background-color: #dc3545;
+  color: white;
+}
+.btn-primary {
+  background-color: #007bff;
+  color: white;
+}
+.btn-primary:hover {
+  background-color: #0056b3;
+}
+.btn-success {
+  background-color: #28a745;
+  color: white;
+}
+.btn-success:hover {
+  background-color: #1e7e34;
 }
 
 /* Message styles */
@@ -164,13 +177,21 @@ button:hover,
   min-width: 150px;
   margin: 5px;
 }
-
 .stat-card h3 {
   margin: 0;
   color: #495057;
   font-size: 2em;
 }
-
+.stat-card h4 {
+  margin: 0 0 10px 0;
+  color: #666;
+  font-size: 14px;
+}
+.stat-card .number {
+  font-size: 24px;
+  font-weight: bold;
+  color: #333;
+}
 .stat-card p {
   margin: 5px 0 0 0;
   color: #6c757d;
@@ -260,17 +281,6 @@ button:hover,
   border-radius: 8px;
 }
 
-/* Navigation links */
-nav a {
-  color: #007bff;
-  text-decoration: none;
-  margin-right: 20px;
-}
-
-nav a:hover {
-  text-decoration: underline;
-}
-
 /* Table styles */
 table {
   width: 100%;
@@ -298,6 +308,7 @@ tr:hover {
 .pagination {
   display: flex;
   justify-content: center;
+  align-items: center;
   gap: 10px;
   margin-top: 20px;
 }
@@ -321,6 +332,26 @@ tr:hover {
   color: white;
 }
 
+/* Pagination */
+.pagination button {
+  padding: 8px 12px;
+  border: 1px solid #ddd;
+  background-color: white;
+  cursor: pointer;
+  border-radius: 4px;
+}
+.pagination button:hover {
+  background-color: #f8f9fa;
+}
+.pagination button:disabled {
+  background-color: #e9ecef;
+  cursor: not-allowed;
+}
+.pagination .current-page {
+  font-weight: bold;
+  color: #007bff;
+}
+
 /* Utility classes */
 .text-center {
   text-align: center;