Simplified timetable check and used HTTPS for map tiles

CHANGELOG.md

@@ -12,6 +12,8 @@
 
 ### 🔧 Internal changes
 
+- Simplified timetable availability check in `Description.tsx` by removing redundant `Object.keys(sessions).length !== 0` condition
+- Updated OpenStreetMap tile layer URL from HTTP to HTTPS in `CampusMap.tsx` for improved security
 - Extracted read-only selection, prerequisite, and status computations (`isSelected`, `arePrereqsSatisfied*`, `compute*Status`, `totalSelectedCredits`) from `Graph.js` into a typed `graphState.ts` module
 - Fixed lint-staged pre-commit hook running Prettier and ESLint over the whole repository instead of only staged files, and added `pnpm-lock.yaml` to `.prettierignore`
 - Extracted the root `<svg>` setup (viewBox calculation, shared filters/markers) of `Graph.js` into a typed `GraphCanvas.tsx` component

js/components/common/CampusMap.tsx

@@ -151,7 +151,7 @@ export function CampusMap({
         dragging={true}
         ref={mapRef}
       >
-        <TileLayer url="http://{s}.tile.osm.org/{z}/{x}/{y}.png" />
+        <TileLayer url="https://{s}.tile.osm.org/{z}/{x}/{y}.png" />
         <FeatureGroup ref={groupRef}>{locationMarkers}</FeatureGroup>
       </MapContainer>
       <button id="zoom-button" onClick={zoomToFit}>

js/components/common/Description.tsx

@@ -19,10 +19,7 @@ interface DescriptionProps {
  */
 export function Description({ course, sessions }: DescriptionProps): JSX.Element {
   const timetableUnavailable =
-    Object.keys(sessions).length !== 0 &&
-    !sessions.F?.length &&
-    !sessions.S?.length &&
-    !sessions.Y?.length
+    !sessions.F?.length && !sessions.S?.length && !sessions.Y?.length
 
   let timetableDisplay
   if (timetableUnavailable) {