UI: поднята фиксированная шапка в канале и треде

shine-UI/styles/components.css

@@ -1781,6 +1781,14 @@ textarea.input {
 .channels-screen .page-header {
   margin-bottom: 0;
   align-items: flex-end;
+  position: sticky;
+  top: calc(-1 * max(10px, env(safe-area-inset-top)));
+  z-index: 14;
+  padding: calc(max(10px, env(safe-area-inset-top)) + 2px) 0 6px;
+  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
+  background: rgba(8, 12, 20, 0.9);
+  backdrop-filter: blur(14px);
+  -webkit-backdrop-filter: blur(14px);
 }
 
 .channels-screen .page-header .icon-btn,
@@ -2193,15 +2201,15 @@ textarea.input {
 }
 
 .channel-message-avatar {
-  width: 34px;
-  height: 34px;
-  min-width: 34px;
-  min-height: 34px;
+  width: 40px;
+  height: 40px;
+  min-width: 40px;
+  min-height: 40px;
   border-radius: 50%;
   display: inline-flex;
   align-items: center;
   justify-content: center;
-  font-size: 14px;
+  font-size: 16px;
   font-weight: 700;
   color: #f4f6ff;
   background: radial-gradient(circle at 30% 30%, #8a73ff, #4f4bda 58%, #3b2b89);
@@ -2342,11 +2350,23 @@ textarea.input {
 }
 
 .channel-header-route-btn {
-  max-width: 68vw;
+  position: absolute;
+  left: 50%;
+  top: 50%;
+  transform: translate(-50%, -66%);
+  max-width: 72vw;
   overflow: hidden;
   text-overflow: ellipsis;
   white-space: nowrap;
-  font-size: 13px;
+  font-size: 14px;
+  min-height: 40px;
+  border-radius: 10px;
+  text-align: center;
+}
+
+.channels-screen .page-header .channel-header-route-btn:hover,
+.channels-screen .page-header .channel-header-route-btn:focus-visible {
+  transform: translate(-50%, -66%);
 }
 
 .thread-node-heading {
@@ -2412,6 +2432,12 @@ textarea.input {
   margin-bottom: 10px;
 }
 
+.thread-history-divider {
+  height: 0;
+  border-top: 2px solid rgba(255, 255, 255, 0.26);
+  margin: 6px 0 10px;
+}
+
 .thread-block--ancestors > .section-title {
   color: #b9cbef;
 }
@@ -3187,6 +3213,14 @@ textarea.input {
   background: none;
   color: rgba(255, 255, 255, 0.9);
   box-shadow: none;
+  transform: translateY(-40%);
+}
+
+.channels-screen--channel .page-header .channel-header-route-btn,
+.channels-screen--thread .page-header .channel-header-route-btn {
+  border: 1px solid rgba(146, 173, 229, 0.38);
+  background: linear-gradient(180deg, rgba(20, 37, 67, 0.9), rgba(13, 24, 47, 0.94));
+  color: #d9e6ff;
 }
 
 .channel-head-actions .secondary-btn {