Changelog

When clicking "Configure" on the Sync tab, the GitHub Sources overlay

opened behind the Settings overlay because GitHubIssueSourcesOverlay

is declared earlier in the visual tree than TasksSettingsOverlay.

Fix: temporarily hide the Settings overlay when opening the GitHub

Sources overlay, then re-show it when the GitHub Sources overlay

closes via a PropertyChanged listener on IsOpen.

Includes BUG #68 (collapsible sidebar) and BUG #66 (inline validation).

Replace bottom-of-form error messages with inline validation:

• Title field: red border + "Title is required." message below field
• End time fields: red border around date/time group + inline error

message when end time is before start time

• General ValidationError kept at bottom for read-only and save errors

Add HasTitleError, HasEndTimeError, EndTimeErrorMessage properties to

EventEditorViewModel. Errors clear on form reset and re-validation.

New ValidationConverters.ErrorBorderThickness converter (bool → Thickness).

Replace static Border sidebar with shared PluginSidebar control from

PrivStack.UI.Adaptive. Sidebar now has collapse/expand toggle with

smooth animation, resizable width, and consistent behavior matching

Contacts, Snippets, and RSS plugins.

• Add IsCalendarSidebarCollapsed property to CalendarViewModel
• Move sidebar content into PluginSidebar.SidebarContent slot
• Move "+ New Event" button into PluginSidebar.FooterContent slot
• Calendar sources, mini calendar, and quick add all inside sidebar

• Remove duplicate GitHubProjectItemLabel DTO; reuse GitHubLabel

directly on GitHubProjectItem.ContentLabels to eliminate unnecessary

type conversion in the mapper

• Add typed accessors on TaskItem for project-specific custom fields:

GitHubProjectSourceId, GitHubProjectItemNodeId, GitHubProjectStatus

• Extract GetCustomFieldString helper to DRY the JsonElement unboxing

pattern shared by GitHubUrl and the new accessors

• Simplify HasProjectStatusChanged to use the typed accessor