Here is a conventional commit message summarizing the refactoring work:

```
feat: Refactor calendar feature into blueprint

- Moved calendar logic from `features/calendar.py` and `app.py` into a new blueprint at `routes/calendar.py`.
- Removed the `Calendar` class and refactored logic into helper functions within the blueprint module for better organization and readability.
- Eliminated the `pandas` dependency for date range generation, using standard `datetime` operations instead.
- Resolved circular import issues between `db.py`, `extensions.py`, and `routes/calendar.py` by adjusting import locations.
- Corrected `url_for` calls in templates (`calendar.html`, `partials/people_link.html`) to reference the new blueprint endpoint (`calendar.get_calendar`).
- Fixed an `AttributeError` related to HTMX request checking in the calendar route.
- Corrected `AttributeError` related to `.date()` calls on `datetime.date` objects in view processing functions.
- Updated `templates/changelog/changelog.html` to document the refactoring and associated fixes.
```

app.py

@@ -7,6 +7,7 @@ from jinja2_fragments import render_block
 from decorators import validate_person, validate_topset, validate_workout
 from routes.auth import auth, get_person_by_id
 from routes.changelog import changelog_bp
+from routes.calendar import calendar_bp # Import the new calendar blueprint
 from extensions import db
 from utils import convert_str_to_date, generate_plot
 from flask_htmx import HTMX
@@ -34,6 +35,7 @@ def load_user(person_id):
 
 app.register_blueprint(auth, url_prefix='/auth')
 app.register_blueprint(changelog_bp, url_prefix='/changelog')
+app.register_blueprint(calendar_bp) # Register the calendar blueprint
 
 @app.after_request
 def response_minify(response):
@@ -127,22 +129,6 @@ def person_overview(person_id):
 
     return render_template('person_overview.html', **render_args), 200, {"HX-Push-Url": url_for('person_overview', person_id=person_id, min_date=min_date, max_date=max_date, exercise_id=selected_exercise_ids), "HX-Trigger": "refreshStats"}
 
-@ app.route("/person/<int:person_id>/calendar")
-def get_calendar(person_id):
-    selected_date = convert_str_to_date(request.args.get(
-        'date'), '%Y-%m-%d') or date.today()
-    selected_view = request.args.get('view') or 'month'
-
-    if selected_view == 'overview':
-        return redirect(url_for('person_overview', person_id=person_id))
-    elif selected_view == 'notes':
-        return redirect(url_for('get_person_notes', person_id=person_id))
-
-    calendar_view = db.calendar.fetch_workouts_for_person(person_id, selected_date, selected_view)
-
-    if htmx:
-        return render_block(app.jinja_env, 'calendar.html', 'content', **calendar_view), 200, {"HX-Push-Url": url_for('get_calendar', person_id=person_id, view=selected_view, date=selected_date), "HX-Trigger": "refreshStats"}
-    return render_template('calendar.html', **calendar_view), 200, {"HX-Push-Url": url_for('get_calendar', person_id=person_id, view=selected_view, date=selected_date), "HX-Trigger": "refreshStats"}
 
 @ app.route("/person/<int:person_id>/notes", methods=['GET'])
 @ validate_person
@@ -166,8 +152,8 @@ def create_workout(person_id):
 @ validate_workout
 def delete_workout(person_id, workout_id):
     db.delete_workout(workout_id)
-    return redirect(url_for('get_calendar', person_id=person_id))
-    #return "", 200, {"HX-Trigger": "updatedPeople", "HX-Push-Url": url_for('get_calendar', person_id=person_id)}
+    return redirect(url_for('calendar.get_calendar', person_id=person_id))
+    #return "", 200, {"HX-Trigger": "updatedPeople", "HX-Push-Url": url_for('calendar.get_calendar', person_id=person_id)}
 
 
 @ app.route("/person/<int:person_id>/workout/<int:workout_id>/start_date_edit_form", methods=['GET'])