Changelog

Refactor ImapSyncService to expose pure static methods for testing:

• Extract ClassifyFolder(FolderAttributes, string) as internal static

overload; the private IMailFolder overload delegates to it

• Change MapSecurity from private to internal static
• MapProviderToConnectionId was already internal static

Add 22 tests in ImapSyncServiceTests covering:

• ClassifyFolder: attribute-based and name-based classification for all

folder types (Inbox, Sent, Drafts, Trash, Junk, Archive, Starred,

All, Category, Other)

• MapProviderToConnectionId: Gmail->google, Outlook->microsoft, and

throws for unsupported providers

• MapSecurity: all three EmailSecurityMode variants

MapToEmailMessage skipped — requires constructing MailKit's

IMessageSummary with internal/sealed Envelope types, not worth the

fragility for a straightforward field-mapping method.

Replace hover-visible up/down/remove buttons in BulletListEditor,

NumberedListEditor, and TaskListEditor with:

• Drag-to-reorder: hold and drag the list marker (bullet, number, or

checkbox) to reorder items within the same parent list. Uses Avalonia

DragDrop with 5px threshold, drop-above/drop-below indicators, and

same-parent validation to prevent cross-list moves.

• Right-click context menu: "Delete List Item" on each row, reusing

existing RemoveItem logic.

Also fixes FocusItemAtFlatIndex to handle both Grid and StackPanel

children of rowBorder (the StackPanel case occurs when ChildBlocks

are present).

Removed: CreateReorderButton, MoveItemUp, MoveItemDown methods and

all reorder-controls/reorder-btn AXAML styles.

Remove root-level left margin from BulletListEditor (20px),

NumberedListEditor (16px), and TaskListEditor (24px) ItemsPanel

containers. Top-level list items should align with other block content

(headings, paragraphs) — the BlockWrapper handle gutter already

provides the left offset. Nesting still works via depth * 24 on each

item row.

• Drag handle: 28px → 20px width, 4-dot grip (was 6-dot), smaller padding
• Insert handle: 24px → 20px
• Removed MoveUp/MoveDown buttons entirely (drag reorder + context menu suffice)
• Removed the action buttons column (Grid column 4)
• Relocated RemoveButton under the drag handle in the handle column (20x20,

hidden by default, fades in on hover like the drag handle)

• Handle column margin: 6px → 4px gap to content

Net effect: the handle gutter is ~10px narrower, block content gets more space,

and the UI is less cluttered — only insert, drag, and delete in a compact stack.

Adds an internal constructor accepting HttpClient for test injection,

enabling comprehensive testing of the CalDAV protocol implementation.

Tests cover: calendar discovery (PROPFIND chain), well-known fallback,

non-calendar/non-VEVENT filtering, Apple color alpha stripping, event

fetching (REPORT), sync-collection with changed/deleted events, PUT

with ETag/conflict handling, and DELETE with 404 acceptance.