feat: responsive compact mail view + folder unread badges

- CompactMailDelegate: card-based view for narrow panels (<420px)
  * Avatar with hash-based color, sender + date (relative format)
  * Subject line with attachment icon
  * Action buttons: flag, delete, category, more (context menu)
  * Unread highlight with light blue background + bold sender
- MailListView: automatic switch between tree/table (wide) and list/cards (narrow)
  * QStackedWidget with QTreeView + QListView sharing same proxy model
  * resizeEvent threshold at 420px
  * Signals forwarded to MainMainWindow for actions
- FolderTreeDelegate: custom paint for folder tree
  * Unread count badge (blue pill) right-aligned on folder nodes
  * Account nodes bold, folder nodes normal weight
  * Proper indentation per depth level
- MailItemDao::countUnreadByFolderId() for real-time unread counts
- MainMainWindow handlers for compact actions (flag, delete, category, more menu)

build/wino-mail-qt_autogen/YPKJ5OE7LN/moc_accountsetupdialog.cpp

@@ -52,7 +52,10 @@ template <> constexpr inline auto AccountSetupDialog::qt_create_metaobjectdata<q
         "id",
         "startOAuthAuthentication",
         "onAccountAdded",
-        "onAuthTimeout"
+        "onAuthTimeout",
+        "onConnectionWizardFinished",
+        "Account::ConnectionSettings",
+        "settings"
     };
 
     QtMocHelpers::UintData qt_methods {
@@ -78,6 +81,10 @@ template <> constexpr inline auto AccountSetupDialog::qt_create_metaobjectdata<q
         }}),
         // Slot 'onAuthTimeout'
         QtMocHelpers::SlotData<void()>(12, 2, QMC::AccessPrivate, QMetaType::Void),
+        // Slot 'onConnectionWizardFinished'
+        QtMocHelpers::SlotData<void(const Account::ConnectionSettings &)>(13, 2, QMC::AccessPrivate, QMetaType::Void, {{
+            { 0x80000000 | 14, 15 },
+        }}),
     };
     QtMocHelpers::UintData qt_properties {
     };
@@ -109,6 +116,7 @@ void AccountSetupDialog::qt_static_metacall(QObject *_o, QMetaObject::Call _c, i
         case 5: _t->startOAuthAuthentication(); break;
         case 6: _t->onAccountAdded((*reinterpret_cast<std::add_pointer_t<Account>>(_a[1]))); break;
         case 7: _t->onAuthTimeout(); break;
+        case 8: _t->onConnectionWizardFinished((*reinterpret_cast<std::add_pointer_t<Account::ConnectionSettings>>(_a[1]))); break;
         default: ;
         }
     }
@@ -137,14 +145,14 @@ int AccountSetupDialog::qt_metacall(QMetaObject::Call _c, int _id, void **_a)
     if (_id < 0)
         return _id;
     if (_c == QMetaObject::InvokeMetaMethod) {
-        if (_id < 8)
+        if (_id < 9)
             qt_static_metacall(this, _c, _id, _a);
-        _id -= 8;
+        _id -= 9;
     }
     if (_c == QMetaObject::RegisterMethodArgumentMetaType) {
-        if (_id < 8)
+        if (_id < 9)
             *reinterpret_cast<QMetaType *>(_a[0]) = QMetaType();
-        _id -= 8;
+        _id -= 9;
     }
     return _id;
 }