Notification Feed & Action Center

[undead2146]

1. User Story

As a player,
I want to access a history of notifications via a button in the title bar,
so that I can review messages I might have missed and find actionable items.

As a player,
I want to perform actions (Accept/Deny) directly from the notification feed,
so that I can quickly respond to requests without navigating away from my current context.

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2. Description

Currently, the GenHub notification system (INotificationService) provides transient "toast" notifications that disappear after a set time. This creates a problem where users may miss important information or actionable requests if they step away or are focused elsewhere.

This feature introduces a persistent Notification Feed accessible via a new bell icon in the Main Window title bar (adjacent to the existing Update indicator).

Architectural Context:

• Pillars Affected: Core.Services (NotificationService), UI.Shell (MainViewModel/View).
• Pipeline Tier: Tier 1: Core/Shell.
• Target Logic:
  • Extend NotificationService to maintain an in-memory history of NotificationMessage objects.
  • Implement a toggleable Popup or Flyout in MainView bound to the feed.
  • Enhance NotificationMessage to support bi-directional actions (Accept/Deny callbacks).

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3. Acceptance Criteria

• Criterion 1: A "Bell" icon button is added to the MainView title bar (right side, near window controls/updates).
• Criterion 2: Clicking the Bell toggles a dropdown/flyout panel displaying the list of past notifications.
• Criterion 3: The list supports "Actionable" notifications that display "Accept" and "Deny" buttons.
• Criterion 4: Clicking an action button triggers the associated callback and (optionally) dismisses/archives the notification.
• Criterion 5: A "Clear All" button is available to empty the history.
• Validation:
  • Unit tests for NotificationManagerViewModel handling history addition/removal.
  • Manual verification that actions trigger the expected log/logic.

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4. Technical Notes

• Models/Interfaces:
  • Refactor INotificationService to expose a ReadOnlyObservableCollection<NotificationMessage> History.
  • Update NotificationMessage record (or create a wrapper NotificationFeedItemViewModel) to handle ICommand binding for actions.
• C# / MVVM Requirements:
  • Create NotificationFeedViewModel to back the flyout view.
  • Use CommunityToolkit.Mvvm for relay commands.
  • Ensure the feed does not auto-dismiss items, unlike the toasts.
• UI:
  • Use Avalonia Popup or custom overlay for the feed.
  • Style consistent with NotificationToastView (Dark/Glassmorphism).

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5. References & Links

• Notification System Docs
• MainView Implementation