Feat: Hiding students proposed projects from students that did not propose them

app/views/student.py

 from flask import Blueprint, flash, redirect, render_template, request, url_for
 from flask_login import current_user, login_required
+from sqlalchemy import or_
 
 from app import messages
 from app.database import db
@@ -14,9 +15,13 @@ bp = Blueprint("student", __name__, url_prefix="/student")
 @login_required
 @students_only
 def projects():
-    active_projects: list[Project] = Project.query.filter(
-        Project.deleted.is_(None)
-    ).all()
+    active_projects: list[Project] = (
+        Project.query.filter(
+            or_(Project.on_behalf.is_(None), Project.on_behalf == current_user.username)
+        )
+        .filter(Project.deleted.is_(None))
+        .all()
+    )
     short_listings = Shortlisting.query.filter_by(student=current_user.username).all()
     short_listings = {s.project_id for s in short_listings}
     return render_template(