fix: source list scroll, citation targeting, and page UI polish

- Replace ScrollArea with native overflow-y-auto for reliable mouse wheel scrolling
- Scope source DOM IDs by message ID to fix cross-round citation jumps
- Improve profile, settings, forum, knowledge page layouts
- Update mobile navigation and chat interface

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

web/src/app/(main)/admin/knowledge/page.tsx

@@ -91,8 +91,8 @@ export default function KnowledgeAdminPage() {
                     <span
                       className={`inline-flex items-center px-2 py-0.5 rounded-full text-xs font-medium ${
                         kb.is_system
-                          ? "bg-blue-100 text-blue-700"
-                          : "bg-slate-100 text-slate-600"
+                          ? "bg-primary/10 text-primary"
+                          : "bg-muted text-muted-foreground"
                       }`}
                     >
                       {kb.is_system ? "系统" : "用户"}
@@ -108,7 +108,7 @@ export default function KnowledgeAdminPage() {
                       <div className="flex items-center justify-center gap-1">
                         <button
                           onClick={() => handleDelete(kb.id)}
-                          className="text-xs px-2 py-1 bg-red-600 text-white rounded hover:bg-red-700"
+                          className="text-xs px-2 py-1 bg-destructive text-destructive-foreground rounded hover:bg-destructive/80"
                         >
                           确认
                         </button>
@@ -122,7 +122,7 @@ export default function KnowledgeAdminPage() {
                     ) : (
                       <button
                         onClick={() => setConfirmDelete(kb.id)}
-                        className="text-red-500 hover:text-red-700 transition-colors"
+                        className="text-destructive hover:text-destructive/80 transition-colors"
                       >
                         <Trash2 className="w-4 h-4" />
                       </button>