chore: remove unused legacy departure card styles and dead code

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

public/css/components.css

@@ -768,19 +768,7 @@ body.landscape .countdown-large.soon {
     text-shadow: 0 0 8px #f39c12, 0 0 12px #f39c12, 0 0 16px rgba(243, 156, 18, 0.8);
 }
 
-/* Time range (legacy) */
-.time-range {
-    font-size: 0.85em;
-    color: var(--color-text-muted);
-    font-weight: 500;
-    white-space: nowrap;
-}
-
-body.dark-mode .time-range {
-    color: var(--color-text-secondary);
-}
-
-/* Next departures (replaces time-range) */
+/* Next departures */
 .next-departures {
     font-size: 0.8em;
     color: var(--color-text-muted);
@@ -1510,10 +1498,6 @@ body.dark-mode .config-search-input:focus-visible {
         max-width: 75px;
     }
 
-    .time-range {
-        font-size: 0.75em;
-    }
-
     .direction-arrow-box {
         width: 20px;
         height: 20px;

public/css/main.css

@@ -281,7 +281,6 @@ body.landscape .countdown-large {
     color: var(--color-text-light);
 }
 
-body.landscape .time-range,
 body.landscape .next-departures {
     color: var(--color-text-secondary);
 }

public/js/components/DeparturesManager.js

@@ -244,6 +244,8 @@ class DeparturesManager {
         return { countdownText, countdownClass };
     }
 
+    // --- Legacy single-site display methods (fallback if API returns data.departures instead of data.sites) ---
+
     /**
      * Create a departure card element (legacy format)
      * @param {Object} departure - Departure object
@@ -389,8 +391,11 @@ class DeparturesManager {
         });
     }
 
+    // --- Legacy single-site display methods (continued) ---
+
     /**
-     * Display departures in the UI
+     * Display departures in the UI (legacy single-site path)
+     * Called when API returns data.departures instead of data.sites.
      * @param {Array} departures - Array of departure objects
      */
     displayDepartures(departures) {
@@ -414,7 +419,7 @@ class DeparturesManager {
     }
 
     /**
-     * Update existing cards or add new ones
+     * Update existing cards or add new ones (legacy single-site path)
      * @param {Array} newDepartures - Array of new departure objects
      */
     updateExistingCards(newDepartures) {
@@ -460,7 +465,7 @@ class DeparturesManager {
     }
 
     /**
-     * Update card content
+     * Update card content (legacy single-site path)
      * @param {HTMLElement} card - Card element
      * @param {Object} departure - Departure object
      */
@@ -482,6 +487,8 @@ class DeparturesManager {
         }
     }
 
+    // --- End of legacy single-site display methods ---
+
     /**
      * Add highlight effect to element
      * @param {HTMLElement} element - Element to highlight