feat: followed activity

[BugenZhao]

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[Copilot]

Pull request overview

This PR implements a "followed activity" feature that allows users to view activity from users they follow. The feature integrates with the NGA forum's follow_v2.get_push_list API endpoint to fetch and display activities such as posted topics, posted replies, and favorited content.

Changes:

• Added protocol buffer definitions for Activity data model and ActivityList request/response
• Implemented backend service logic in Rust to fetch and parse followed activity from the NGA API
• Created Swift UI views for displaying the activity list and individual activity rows
• Added localization support in Chinese for the new feature

Reviewed changes

Copilot reviewed 17 out of 17 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
protos/Service.proto	Added ActivityListRequest/Response message definitions and integrated into AsyncRequest
protos/DataModel.proto	Defined Activity message with type enum and fields for activity data
logic/service/src/lib.rs	Added activity module to the service library
logic/service/src/dispatch/mod.rs	Added activity_list request handler to the async dispatcher
logic/service/src/dispatch/handlers_async.rs	Wired up activity_list handler to get_activity_list function
logic/service/src/activity.rs	Implemented complete activity parsing and API integration with tests
docs/nga-follow_v2-get_push_list.md	Comprehensive API documentation with examples
app/Shared/Views/UserMenuView.swift	Added navigation link to followed activity list in user menu
app/Shared/Views/TopicSubjectView.swift	Changed default lineLimit from nil to 2 for consistency
app/Shared/Views/TopicRowView.swift	Refactored to use topic.read property and removed explicit lineLimit parameter
app/Shared/Views/TopicPostRowView.swift	Removed explicit lineLimit parameter, now uses default
app/Shared/Views/NotificationRowView.swift	Applied topicSubjectDimmed modifier for consistent styling
app/Shared/Views/FollowedActivityRowView.swift	New view component for rendering individual activity items
app/Shared/Views/FollowedActivityListView.swift	New view for displaying paginated list of followed activities
app/Shared/Utilities/PlusFeature.swift	Added followedActivity as a new Plus feature
app/Shared/Protos/Extensions.swift	Added Activity.TypeEnum extensions and Topic.read computed property
app/Shared/Localization/zh-Hans.lproj/Localizable.strings	Added Chinese translations for new feature strings

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[Copilot]

Field number 6 is skipped in the Activity message (jumps from field 5 to field 7). This could be intentional if field 6 was reserved or removed, but it's unusual. Consider adding a comment explaining why field 6 is skipped, or use field 6 instead of field 7 for timestamp if this was unintentional.

Suggested change

	PostId post_id = 5; // pid=0 indicates topic.
	PostId post_id = 5; // pid=0 indicates topic.
	reserved 6; // Field 6 intentionally left unused (previously reserved/removed).

[Copilot]

The icon for the followedActivity feature is set to "sparkles" here, but the UI in UserMenuView.swift and FollowedActivityListView.swift uses "dot.radiowaves.left.and.right". Consider using the same icon in both places for consistency, or verify that the difference is intentional.

Suggested change

	"sparkles"
	"dot.radiowaves.left.and.right"