feat: enhance audit logging, add MCP settings, and production docker setup

- Implemented comprehensive audit logging for Tasks, Users, Settings, Goals, Labels, AI Chat, and Rewards.
- Added Admin UI for MCP Server settings and Audit Logs.
- Created docker-compose-production.yml with Traefik configuration.
- Fixed backend bugs (missing storage methods, route closure).
- Added Audit Logging Guidelines.

client/src/components/AiChat.tsx

@@ -57,7 +57,7 @@ export function AiChat() {
         return (
             <Button
                 onClick={() => setIsOpen(true)}
-                className="fixed bottom-24 right-8 z-50 rounded-full h-14 w-14 shadow-xl bg-gradient-to-r from-pink-500 to-purple-600 hover:scale-110 transition-transform duration-200"
+                className="fixed bottom-4 right-8 z-50 rounded-full h-14 w-14 shadow-xl bg-gradient-to-r from-pink-500 to-purple-600 hover:scale-110 transition-transform duration-200"
                 size="icon"
             >
                 <Sparkles className="h-6 w-6 text-white animate-pulse" />
@@ -66,7 +66,7 @@ export function AiChat() {
     }
 
     return (
-        <Card className="fixed bottom-24 right-8 z-50 w-80 md:w-96 h-[500px] flex flex-col shadow-2xl border-primary/20 animate-in slide-in-from-bottom-10 fade-in duration-200">
+        <Card className="fixed bottom-4 right-8 z-50 w-80 md:w-96 h-[500px] flex flex-col shadow-2xl border-primary/20 animate-in slide-in-from-bottom-10 fade-in duration-200">
             <CardHeader className="p-4 border-b bg-primary/5 flex flex-row items-center justify-between shrink-0">
                 <div className="flex items-center gap-2 font-semibold">
                     <Bot className="w-5 h-5 text-primary" />