feat: post search adapted with global search (#4019)

framework/core/less/common/Search.less

@@ -140,7 +140,7 @@
 .SearchModal-visual-input mark {
   margin: 0;
   padding: 0;
-  background-color: var(--control-bg-shaded);
+  background-color: var(--control-bg-light);
   color: transparent;
 }
 

framework/core/less/common/root.less

@@ -83,6 +83,8 @@
 [data-theme^=light] {
   .scheme(light);
 
+  --search-gambit:                 var(--control-bg-shaded);
+
   // ---------------------------------
   // UTILITIES
 
@@ -115,6 +117,8 @@
 [data-theme^=dark] {
   .scheme(dark);
 
+  --search-gambit:                 var(--control-bg-light);
+
   // ---------------------------------
   // UTILITIES
 

framework/core/less/forum.less

@@ -17,6 +17,7 @@
 @import "forum/HeaderDropdown";
 @import "forum/HeaderList";
 @import "forum/Post";
+@import "forum/PostList";
 @import "forum/PostStream";
 @import "forum/Scrubber";
 @import "forum/UserSecurityPage";

framework/core/less/forum/PostList.less

@@ -0,0 +1,19 @@
+.PostList-discussions {
+  list-style: none;
+  margin: 0;
+  padding: 0;
+}
+
+.PostListItem-discussion {
+  font-weight: bold;
+  margin-bottom: 10px;
+  position: relative;
+  z-index: 1;
+
+  &, a {
+    color: var(--muted-color);
+  }
+  a {
+    font-style: italic;
+  }
+}