Refactor code structure for improved readability and maintainability

.vscode/ftp-kr.sync.cache.json

@@ -323,7 +323,7 @@
       },
       "index.php": {
         "type": "-",
-        "size": 3891,
+        "size": 4210,
         "lmtime": 1771198110809,
         "modified": true
       },
@@ -622,15 +622,15 @@
         "products": {
           "main_view.php": {
             "type": "-",
-            "size": 49238,
-            "lmtime": 1771441425576,
+            "size": 64362,
+            "lmtime": 1771717398898,
             "modified": false
           },
           "product_history.php": {
             "type": "-",
-            "size": 13214,
-            "lmtime": 1769467103988,
-            "modified": true
+            "size": 13326,
+            "lmtime": 1771717401282,
+            "modified": false
           }
         },
         "site": {
@@ -656,8 +656,8 @@
         "campaigns": {
           "main_view.php": {
             "type": "-",
-            "size": 20532,
-            "lmtime": 1771626632932,
+            "size": 21607,
+            "lmtime": 1771717394441,
             "modified": false
           }
         },
@@ -678,8 +678,8 @@
         "campaign_terms": {
           "main_view.php": {
             "type": "-",
-            "size": 81281,
-            "lmtime": 1771441788473,
+            "size": 81511,
+            "lmtime": 1771717410322,
             "modified": false
           }
         },
@@ -694,8 +694,16 @@
         "facebook_ads": {
           "main_view.php": {
             "type": "-",
-            "size": 10785,
-            "lmtime": 1771619352316,
+            "size": 10806,
+            "lmtime": 1771717403326,
+            "modified": false
+          }
+        },
+        "logs": {
+          "main_view.php": {
+            "type": "-",
+            "size": 5948,
+            "lmtime": 1771717396318,
             "modified": false
           }
         }