Fixed Bug Server

## Summary
This branch contains several bug fixes and performance improvements, primarily focusing on:
- Database connection management
- MQTT client stability
- Logging optimization
- API enhancements

## Detailed Changes

### Fixed Issues
1. **Database Connection Management**
   - Removed  from user-validate API route to prevent connection pool exhaustion
   - Added proper connection handling in global Prisma setup
   - Reduced logging verbosity in production environments

2. **MQTT Client Improvements**
   - Enhanced MQTT client initialization with proper error handling
   - Added reconnection logic with configurable intervals
   - Implemented cleanup functions to prevent memory leaks
   - Added separate initialization logic for server and client-side code

3. **Logging Optimization**
   - Removed excessive logging in middleware that was causing high CPU usage
   - Configured appropriate log levels for development and production

4. **Component Stability**
   - Added safety checks in text editor component to prevent MQTT operations on the server side
   - Improved MQTT publishing logic with client availability checks

### New Files
-  - Utility functions for safe database operations

### Modified Files
1.
   - Removed problematic  call

2.
   - Configured different logging levels for dev/prod
   - Removed process listeners that were causing disconnections
   - Exported prisma instance separately

3.
   - Removed excessive logging statements

4.
   - Enhanced initialization with error handling
   - Added reconnection and timeout configurations

5.
   - Added proper cleanup functions
   - Improved connection handling

6.
   - Added MQTT client availability checks
   - Prevented server-side MQTT operations

### Performance Improvements
- Reduced database connection overhead
- Optimized MQTT connection handling
- Eliminated unnecessary logging in production
- Better memory management with proper cleanup functions

### No Issue

src/util/mqtt_loader.tsx

@@ -3,20 +3,27 @@
 import { useEffect } from "react";
 import mqtt_client from "./mqtt_client";
 
-export default function   MqttLoader() {
+export default function MqttLoader() {
   useEffect(() => {
-    mqtt_client.on("connect", () => {
-      console.log("connected");
-    });
+    // Only set up connection handlers once
+    const handleConnect = () => {
+      console.log("MQTT connected");
+    };
+
+    const handleError = (error: any) => {
+      console.error("MQTT Error:", error);
+    };
+
+    // Subscribe to events
+    mqtt_client.on("connect", handleConnect);
+    mqtt_client.on("error", handleError);
+
+    // Cleanup function to unsubscribe when component unmounts
+    return () => {
+      mqtt_client.off("connect", handleConnect);
+      mqtt_client.off("error", handleError);
+    };
   }, []);
 
   return null;
-
-  //   <>
-  //     <Stack>
-  //       <Button onClick={onClick}>Tekan</Button>
-  //       <Button onClick={onClick2}>Tekan 2</Button>
-  //     </Stack>
-  //   </>
-  // );
 }