feat: Implement recipe selection with backend integration

Backend changes (C#):
- Add SelectRecipe method to MachineBridge for recipe selection
- Add currentRecipeId tracking in MainForm
- Implement SELECT_RECIPE handler in WebSocketServer

Frontend changes (React/TypeScript):
- Add selectRecipe method to communication layer
- Update handleSelectRecipe to call backend and handle response
- Recipe selection updates ModelInfoPanel automatically
- Add error handling and logging for recipe operations

Layout improvements:
- Add Layout component with persistent Header and Footer
- Create separate IOMonitorPage for full-screen I/O monitoring
- Add dynamic IO tab switcher in Header (Inputs/Outputs)
- Ensure consistent UI across all pages

🤖 Generated with Claude Code

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

backend/HMIWeb/MachineBridge.cs

@@ -41,9 +41,25 @@ namespace HMIWeb
             _host.HandleCommand(command);
         }
 
-        public void LoadRecipe(string recipeId)
+        public string SelectRecipe(string recipeId)
         {
-            Console.WriteLine($"[C#] Loading Recipe: {recipeId}");
+            Console.WriteLine($"[C#] Selecting Recipe: {recipeId}");
+
+            // In real app, load recipe settings here
+            // For now, just return success
+            try
+            {
+                // Simulate recipe loading logic
+                _host.SetCurrentRecipe(recipeId);
+
+                var response = new { success = true, message = "Recipe selected successfully", recipeId = recipeId };
+                return JsonConvert.SerializeObject(response);
+            }
+            catch (Exception ex)
+            {
+                var response = new { success = false, message = ex.Message };
+                return JsonConvert.SerializeObject(response);
+            }
         }
 
         public string GetConfig()
@@ -93,5 +109,49 @@ namespace HMIWeb
             Console.WriteLine($"[Backend] Data: {configJson}");
             // In a real app, we would save this to a file or database
         }
+        public string GetIOList()
+        {
+            var ioList = new System.Collections.Generic.List<object>();
+
+            // Outputs (0-31)
+            for (int i = 0; i < 32; i++)
+            {
+                string name = $"DOUT_{i:D2}";
+                if (i == 0) name = "Tower Lamp Red";
+                if (i == 1) name = "Tower Lamp Yel";
+                if (i == 2) name = "Tower Lamp Grn";
+                
+                ioList.Add(new { id = i, name = name, type = "output", state = false });
+            }
+
+            // Inputs (0-31)
+            for (int i = 0; i < 32; i++)
+            {
+                string name = $"DIN_{i:D2}";
+                bool initialState = false;
+                if (i == 0) name = "Front Door Sensor";
+                if (i == 1) name = "Right Door Sensor";
+                if (i == 2) name = "Left Door Sensor";
+                if (i == 3) name = "Back Door Sensor";
+                if (i == 4) { name = "Main Air Pressure"; initialState = true; }
+                if (i == 5) { name = "Vacuum Generator"; initialState = true; }
+                if (i == 6) { name = "Emergency Stop Loop"; initialState = true; }
+
+                ioList.Add(new { id = i, name = name, type = "input", state = initialState });
+            }
+
+            return Newtonsoft.Json.JsonConvert.SerializeObject(ioList);
+        }
+        public string GetRecipeList()
+        {
+            var recipes = new System.Collections.Generic.List<object>();
+            recipes.Add(new { id = "1", name = "Wafer_Proc_300_Au", lastModified = "2023-10-25" });
+            recipes.Add(new { id = "2", name = "Wafer_Insp_200_Adv", lastModified = "2023-10-26" });
+            recipes.Add(new { id = "3", name = "Glass_Gen5_Bonding", lastModified = "2023-10-27" });
+            recipes.Add(new { id = "4", name = "Solar_Cell_Cut_A", lastModified = "2023-11-01" });
+            recipes.Add(new { id = "5", name = "LED_Mount_HighSpeed", lastModified = "2023-11-15" });
+
+            return Newtonsoft.Json.JsonConvert.SerializeObject(recipes);
+        }
     }
 }