feat(i18n): add select-menu for i18n

assets/css/_partial/_header.scss

@@ -10,6 +10,28 @@ header {
   .header-title {
     font-weight: bold;
   }
+
+  .select-language {
+    font-weight: $global-font-weight;
+    border: none;
+    box-shadow: none;
+    background: transparent;
+    background-image: none;
+    -webkit-appearance: none;
+    color: $global-font-color;
+
+    .dark-theme & {
+      color: $global-font-color-dark;
+    }
+
+    &:focus {
+      outline: none;
+    }
+
+    &:hover {
+      cursor: pointer;
+    }
+  }
 }
 
 #header-desktop {

assets/css/_partial/_home/_summary.scss

@@ -30,24 +30,6 @@
       font-size: 1.6rem;
     }
 
-    .post-meta {
-      a {
-        color: $global-font-secondary-color !important;
-
-        .dark-theme & {
-          color: $global-font-secondary-color-dark !important;
-        }
-
-        &:hover {
-          color: $global-link-hover-color !important;
-
-          .dark-theme & {
-            color: $global-link-hover-color-dark !important;
-          }
-        }
-      }
-    }
-
     .content {
       display: -moz-box;
       display: -webkit-box;
@@ -59,6 +41,11 @@
       overflow: hidden;
       text-overflow: ellipsis;
       overflow-wrap: break-word;
+      color: $global-font-secondary-color;
+
+      .dark-theme & {
+        color: $global-font-secondary-color-dark;
+      }
 
       h2,
       h3,