v0.8.5 fix pinning

frontend/src/components/Message.css

@@ -334,68 +334,3 @@
   user-select: text;
 }
 
-/* Pinned state highlight for toolbar pin button */
-.action-pinned {
-  color: var(--primary) !important;
-}
-
-/* Mobile bottom-sheet overlay for long-press / right-click pin */
-.msg-sheet-overlay {
-  position: fixed;
-  inset: 0;
-  z-index: 500;
-  background: rgba(0,0,0,0.35);
-  display: flex;
-  align-items: flex-end;
-  justify-content: center;
-}
-
-.msg-sheet {
-  background: var(--surface);
-  border-radius: 16px 16px 0 0;
-  padding: 8px 0 max(16px, env(safe-area-inset-bottom)) 0;
-  width: 100%;
-  max-width: 480px;
-  box-shadow: 0 -4px 24px rgba(0,0,0,0.18);
-}
-
-.msg-sheet-handle {
-  width: 36px;
-  height: 4px;
-  border-radius: 2px;
-  background: var(--border);
-  margin: 0 auto 12px;
-}
-
-.msg-sheet-btn {
-  display: flex;
-  align-items: center;
-  gap: 14px;
-  width: 100%;
-  padding: 14px 24px;
-  font-size: 15px;
-  color: var(--text-primary);
-  background: none;
-  border: none;
-  cursor: pointer;
-  text-align: left;
-  transition: background var(--transition);
-}
-
-.msg-sheet-btn:hover:not(:disabled) {
-  background: var(--surface-variant);
-}
-
-.msg-sheet-btn:disabled {
-  opacity: 0.45;
-  cursor: not-allowed;
-}
-
-.msg-sheet-cancel {
-  color: var(--text-secondary);
-  font-weight: 500;
-  border-top: 1px solid var(--border);
-  margin-top: 4px;
-  justify-content: center;
-  gap: 0;
-}