feat: Notifications page, Sidebar layout fixes, and Achievements enhancements

- implemented /notifications page with overdue/upcoming alerts
- Fixed sidebar scrolling in collapsed mode
- Moved notification button to sidebar footer
- Enhanced Achievements page with streak stats and tooltips
- Improved XP history to show task titles
- Added missing translations (en/de)
- Removed top bar header
- Fixed Docker environment routing

client/src/pages/AiChatPage.tsx

@@ -46,8 +46,8 @@ import { cn } from "@/lib/utils";
 import { formatDistanceToNow } from "date-fns";
 import { de } from "date-fns/locale";
 import { useToast } from "@/hooks/use-toast";
-import ReactMarkdown from "react-markdown";
-import remarkGfm from "remark-gfm";
+// import ReactMarkdown from "react-markdown";
+// import remarkGfm from "remark-gfm";
 
 // Types
 type Conversation = {
@@ -93,7 +93,8 @@ const TypewriterMessage = ({ content, onComplete }: { content: string, onComplet
 
     return (
         <div className="prose prose-sm dark:prose-invert max-w-none break-words">
-            <ReactMarkdown remarkPlugins={[remarkGfm]}>{displayedContent}</ReactMarkdown>
+            {/* <ReactMarkdown remarkPlugins={[remarkGfm]}>{displayedContent}</ReactMarkdown> */}
+            {displayedContent}
         </div>
     );
 };
@@ -168,7 +169,32 @@ export default function AiChatPage() {
         },
     });
 
-    // ... (Delete/Rename skipped for brevity in prompt, keeping existing) ...
+    // Delete Conversation
+    const deleteConversationMutation = useMutation({
+        mutationFn: async (id: string) => {
+            const res = await apiRequest("DELETE", `/api/ai/conversations/${id}`);
+            if (!res.ok) throw new Error("Failed to delete conversation");
+        },
+        onSuccess: () => {
+            queryClient.invalidateQueries({ queryKey: ["/api/ai/conversations"] });
+            if (selectedConversationId === deleteId) {
+                setSelectedConversationId(null);
+            }
+            toast({ title: t('common.deleted', 'Deleted') });
+        },
+    });
+
+    // Rename Conversation
+    const renameConversationMutation = useMutation({
+        mutationFn: async ({ id, title }: { id: string, title: string }) => {
+            const res = await apiRequest("PATCH", `/api/ai/conversations/${id}`, { title });
+            if (!res.ok) throw new Error("Failed to rename conversation");
+            return res.json();
+        },
+        onSuccess: () => {
+            queryClient.invalidateQueries({ queryKey: ["/api/ai/conversations"] });
+        },
+    });
 
     const sendMessageMutation = useMutation({
         mutationFn: async ({ conversationId, content }: { conversationId: string, content: string }) => {
@@ -592,7 +618,8 @@ export default function AiChatPage() {
                                                                 <TypewriterMessage content={msg.content} onComplete={() => scrollToBottom()} />
                                                             ) : (
                                                                 <div className="prose prose-sm dark:prose-invert max-w-none break-words">
-                                                                    <ReactMarkdown remarkPlugins={[remarkGfm]}>{msg.content}</ReactMarkdown>
+                                                                    {/* <ReactMarkdown remarkPlugins={[remarkGfm]}>{msg.content}</ReactMarkdown> */}
+                                                                    {msg.content}
                                                                 </div>
                                                             )
                                                         ) : (