fix(dashboard): show exercises without dates in Recent Courses list

Exercises without releaseDate/startDate/dueDate were filtered out of
the dashboard exercise list. Replace the filter with a sort that
prioritizes dated exercises (newest first) and falls back to exercise
ID for dateless ones.

Author: Predixx

CHANGELOG.md

@@ -20,7 +20,7 @@ All notable changes to the Artemis VS Code extension will be documented in this
 
 ### Fixed
 
-- **Dashboard "Recent Courses"**: The section now actually shows the 3 most recently accessed courses (previously it listed all active courses). Falls back to newest exercise activity, then course start date, then title when the access map has fewer than 3 entries. Tracked per (server URL, user) in extension global state. Access gets tracked per machine — opening an exercise or course-details updates the list on your next dashboard visit. Resolves #103.
+- **Dashboard "Recent Courses"**: Shows the 3 most recently accessed courses with exercises sorted by latest published. Exercises without dates are no longer hidden. Resolves #103.
 - **Back-to-Course Navigation**: Fixed "Course data is not available" error when returning from an exercise view to its course. The exercise payload now carries its parent course so back-navigation can restore it.
 - **API Endpoint Alignment**: Aligned API endpoints with the Artemis webapp, including correct feedback and exam endpoints.
 - **Build Error CodeLens**: Fixed duplicate CodeLens errors, missing testCase field in WebSocket feedback, and wired up build log viewing with go-to-source navigation.

extension/src/extension/services/ui/viewInitDataService.ts

@@ -58,12 +58,14 @@ export class ViewInitDataService {
             const course = courseItem.course || courseItem;
             const exercises = course.exercises || [];
 
-            const recentExercises = exercises
-                .filter((ex: ExerciseDetail) => ex.releaseDate || ex.startDate || ex.dueDate)
+            const recentExercises = [...exercises]
                 .sort((a: ExerciseDetail, b: ExerciseDetail) => {
                     const aDate = a.releaseDate || a.startDate || a.dueDate || '';
                     const bDate = b.releaseDate || b.startDate || b.dueDate || '';
-                    return bDate.localeCompare(aDate);
+                    if (aDate && bDate) { return bDate.localeCompare(aDate); }
+                    if (aDate && !bDate) { return -1; }
+                    if (!aDate && bDate) { return 1; }
+                    return (b.id ?? 0) - (a.id ?? 0);
                 });
 
             return {