Fixed: #98 Activity Feed

[gaius01]

Close #98

Recent Activity Feature - Walkthrough
I have implemented a comprehensive Recent Activity tracking and display system. This feature allows users to see what's happening on the portal (new reports, vulnerabilities, and comments) and personalize their feed by following specific protocols, auditors, or companies.

Changes
Backend Architecture

1. Database & Models
   ActivityModel: Central table tracking all system activities (Report Creation, Vulnerability Approval, etc.).
   UserFollowModel: Tracks user subscriptions to Protocols, Auditors, and Companies.
   CommentModel: Structure for storing user comments on various entities.
   DbContext: Updated
   Db.cs
   to include new tables.
2. Services & Processors
   ActivityProcessor: Handles retrieving and enriching activity data with entity details (joining with Report/Protocol tables).
   UserFollowService: Manages follow/unfollow actions and checks status.
   Auto-tracking:
   ReportsController
   and
   VulnerabilitiesController
   now automatically generate activity records when items are created or approved.
3. API Endpoints
   GET /api/v1/activities: Fetch public activity feed.
   GET /api/v1/activities/personalized: Fetch feed filtered by user's follows.
   POST /api/v1/follows: Follow an entity.
   POST /api/v1/comments: Add comments (backend support).
   Frontend Implementation
4. UI Components
   RecentActivity: A new section on the Homepage displaying the latest 6 activities.
   ActivityCard: A reusable component that renders activity details with:
   Actor avatar and name
   Action description and relative time
   Entity links and status icons
   ActivityPage: A dedicated /activity page with:
   "Personalized" vs "All" feed toggles
   Time range filtering (24h, 7d, 30d)
   FollowButton: Added to Protocol Details page to allow users to subscribe to updates.
5. API Integration
   extended
   soroban-security-portal-api.ts
   with new methods for Activities, Follows, and Comments.
   Verification
   Automated Verification
   The backend compiles (standard .NET build).
   The frontend compiles (standard npm build).
   Manual Verification Steps
   Homepage Feed:

Open the homepage.
Observe the "Recent Activity" section.
Verify it shows recent reports/vulnerabilities.
Tracking:

Create a new Report.
Go back to Home -> The new report creation activity appears.
Approve the Report (as Admin) -> The approval activity appears.
Personalization:

Go to a Protocol page.
Click the "Follow" button.
Go to the Activity Page (/activity).
Switch to "Following" tab.
Verify activities related to that protocol appear.
Filtering:

On the Activity Page, use the time range toggle (7 days / 30 days) to see older activities.

[gaius01]

Conflict has been merge for this. Please I will be awaiting for your review.