feat: Implement manual print dialog with full label printing functionality

Added complete manual print dialog to Web UI based on fManualPrint.cs:
- Created ManualPrintDialog component with all input fields (SID, Vendor Lot, Qty, MFG Date, Reel ID, Supplier, Part No)
- Added printer selection (Left/Right), print count, delete after print checkbox, and barcode input
- Implemented ExecuteManualPrint backend method with ZPL label generation and printer integration
- Added WebSocketServer handler for EXECUTE_MANUAL_PRINT command with full parameter support
- Integrated dialog into Header component with proper error handling via AlertContext

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

FrontEnd/communication.ts

@@ -525,7 +525,17 @@ class CommunicationLayer {
         }
     }
 
-    public async openManualPrint(): Promise<{ success: boolean; message: string }> {
+    public async executeManualPrint(printData: {
+        sid: string;
+        venderLot: string;
+        qty: string;
+        mfg: string;
+        rid: string;
+        spy: string;
+        partNo: string;
+        printer: string;
+        count: number;
+    }): Promise<{ success: boolean; message: string }> {
         if (isWebView && machine) {
             return { success: false, message: 'Manual print not yet implemented in WebView2 mode' };
         } else {
@@ -533,7 +543,7 @@ class CommunicationLayer {
                 const timeoutId = setTimeout(() => {
                     this.listeners = this.listeners.filter(cb => cb !== handler);
                     reject(new Error('Manual print timeout'));
-                }, 5000);
+                }, 10000);
 
                 const handler = (data: any) => {
                     if (data.type === 'MANUAL_PRINT_RESULT') {
@@ -544,7 +554,10 @@ class CommunicationLayer {
                 };
 
                 this.listeners.push(handler);
-                this.ws?.send(JSON.stringify({ type: 'OPEN_MANUAL_PRINT' }));
+                this.ws?.send(JSON.stringify({
+                    type: 'EXECUTE_MANUAL_PRINT',
+                    ...printData
+                }));
             });
         }
     }