refactor(styles): move common styles to shared CSS file

Extract duplicated styles across multiple components into a common CSS file and import it where needed. This improves maintainability by reducing code duplication and centralizing style definitions.

src/views/Sessions.vue

@@ -83,21 +83,12 @@ export default {
 </script>
 
 <style scoped>
+@import '../styles/common.css';
+
 .sessions-page {
     padding: 24px;
 }
 
-.page-header {
-    margin-bottom: 24px;
-}
-
-.page-header h2 {
-    font-size: 24px;
-    color: var(--text-color);
-    margin: 0;
-    transition: color 0.3s;
-}
-
 .sessions-grid {
     display: grid;
     grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
@@ -105,20 +96,9 @@ export default {
 }
 
 .session-card {
-    background: var(--card-bg);
-    border-radius: 8px;
-    padding: 20px;
-    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
     transition: background-color 0.3s;
 }
 
-.card-header {
-    display: flex;
-    align-items: center;
-    gap: 16px;
-    margin-bottom: 16px;
-}
-
 .session-icon {
     width: 48px;
     height: 48px;
@@ -149,57 +129,10 @@ export default {
 }
 
 .card-body {
-    display: flex;
-    flex-direction: column;
-    gap: 8px;
     margin-bottom: 16px;
 }
 
-.info-row {
-    display: flex;
-    justify-content: space-between;
-    font-size: 14px;
-}
-
-.info-row .label {
-    color: #666;
-}
-
-.info-row .value {
-    color: var(--text-color);
-    font-weight: 500;
-    transition: color 0.3s;
-}
-
-.card-footer {
-    display: flex;
-    gap: 8px;
-}
-
 .action-btn {
     flex: 1;
-    padding: 8px 16px;
-    border: none;
-    border-radius: 6px;
-    font-size: 14px;
-    font-weight: 500;
-    cursor: pointer;
-    transition: all 0.3s;
-}
-
-.delete-btn {
-    background: #ff4d4f;
-    color: white;
-}
-
-.delete-btn:hover {
-    background: #f04142;
-}
-
-.empty-state {
-    text-align: center;
-    padding: 60px 20px;
-    color: #999;
-    font-size: 16px;
 }
 </style>