feat: Update MailToTaskImporter to handle attachment MIME types and improve filename handling; add CLAUDE.md for project guidance; create TODO.md for PDF attachment issue

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

@@ -121,8 +121,8 @@
           },
           "class.Tasks.php": {
             "type": "-",
-            "size": 23567,
-            "lmtime": 1771241116941,
+            "size": 24179,
+            "lmtime": 1771336367894,
             "modified": false
           },
           "class.Users.php": {
@@ -251,8 +251,8 @@
       ".claude": {
         "settings.local.json": {
           "type": "-",
-          "size": 301,
-          "lmtime": 1771236164946,
+          "size": 449,
+          "lmtime": 1771336223831,
           "modified": false
         }
       },
@@ -323,9 +323,9 @@
           },
           "main_view.php": {
             "type": "-",
-            "size": 42781,
-            "lmtime": 1770583657535,
-            "modified": true
+            "size": 42784,
+            "lmtime": 1771336223833,
+            "modified": false
           },
           "task_edit.php": {
             "type": "-",
@@ -335,8 +335,8 @@
           },
           "task_popup.php": {
             "type": "-",
-            "size": 20929,
-            "lmtime": 1771241165284,
+            "size": 22706,
+            "lmtime": 1771336355877,
             "modified": false
           },
           "task_single.php": {