Create sub folder, delete folder, storage settings, some ui adjustments on threads.

Wino.Core.Domain/Enums/MailOperation.cs

@@ -19,6 +19,8 @@ public enum FolderSynchronizerOperation
     RenameFolder,
     EmptyFolder,
     MarkFolderRead,
+    DeleteFolder,
+    CreateSubFolder,
 }
 
 public enum CalendarSynchronizerOperation

Wino.Core.Domain/Enums/WinoPage.cs

@@ -32,5 +32,6 @@ public enum WinoPage
     CalendarSettingsPage,
     CalendarAccountSettingsPage,
     EventDetailsPage,
-    SignatureAndEncryptionPage
+    SignatureAndEncryptionPage,
+    StoragePage
 }

Wino.Core.Domain/Interfaces/IMailService.cs

@@ -170,4 +170,9 @@ public interface IMailService
     /// <param name="folderId">Folder ID.</param>
     /// <param name="count">Number of recent mails to return.</param>
     Task<IEnumerable<string>> GetRecentMailIdsForFolderAsync(Guid folderId, int count);
+
+    /// <summary>
+    /// Returns all mail copies for the account created before the given UTC date.
+    /// </summary>
+    Task<List<MailCopy>> GetMailCopiesBeforeDateAsync(Guid accountId, DateTime cutoffDateUtc);
 }

Wino.Core.Domain/Interfaces/IMimeStorageService.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+
+namespace Wino.Core.Domain.Interfaces;
+
+public interface IMimeStorageService
+{
+    Task<string> GetMimeRootPathAsync();
+    Task<Dictionary<Guid, long>> GetAccountsMimeStorageSizesAsync(IEnumerable<Guid> accountIds);
+    Task DeleteAccountMimeStorageAsync(Guid accountId);
+    Task<int> DeleteAccountMimeStorageOlderThanAsync(Guid accountId, DateTime cutoffDateUtc);
+}

Wino.Core.Domain/Translations/en_US/resources.json

@@ -739,6 +739,33 @@
     "SettingsStartupItem_Title": "Startup Item",
     "SettingsStore_Description": "Show some love ❤️",
     "SettingsStore_Title": "Rate in Store",
+    "SettingsStorage_Title": "Storage",
+    "SettingsStorage_Description": "Scan and manage MIME cache stored in your local data folder.",
+    "SettingsStorage_ScanFolder": "Scan local data folder",
+    "SettingsStorage_NoLocalMimeDataFound": "No local MIME data found.",
+    "SettingsStorage_NoAccountsFound": "No accounts found.",
+    "SettingsStorage_TotalUsage": "Total local MIME usage: {0}",
+    "SettingsStorage_AccountUsageDescription": "{0} used in local MIME cache",
+    "SettingsStorage_DeleteAll_Title": "Delete all MIME content",
+    "SettingsStorage_DeleteAll_Description": "Delete this account's entire MIME cache folder.",
+    "SettingsStorage_DeleteAll_Button": "Delete all",
+    "SettingsStorage_DeleteAll_Confirm_Title": "Delete all MIME content",
+    "SettingsStorage_DeleteAll_Confirm_Message": "Delete all local MIME data for {0}?",
+    "SettingsStorage_DeleteAll_Success": "All MIME content was deleted.",
+    "SettingsStorage_DeleteOld_Title": "Delete old MIME content",
+    "SettingsStorage_DeleteOld_Description": "Delete MIME files based on mail creation date in local database.",
+    "SettingsStorage_DeleteOld_1Month": "> 1 month",
+    "SettingsStorage_DeleteOld_3Months": "> 3 months",
+    "SettingsStorage_DeleteOld_6Months": "> 6 months",
+    "SettingsStorage_DeleteOld_1Year": "> 1 year",
+    "SettingsStorage_DeleteOld_Confirm_Title": "Delete old MIME content",
+    "SettingsStorage_DeleteOld_Confirm_Message": "Delete local MIME data older than {0} for {1}?",
+    "SettingsStorage_DeleteOld_Success": "Deleted {0} MIME folder(s) older than {1}.",
+    "SettingsStorage_1Month": "1 month",
+    "SettingsStorage_3Months": "3 months",
+    "SettingsStorage_6Months": "6 months",
+    "SettingsStorage_1Year": "1 year",
+    "SettingsStorage_Months": "{0} months",
     "SettingsTaskbarBadge_Description": "Include unread mail count in taskbar icon.",
     "SettingsTaskbarBadge_Title": "Taskbar Badge",
     "SettingsThreads_Description": "Organize messages into conversation threads.",