Add cursor hour header highlighting in calendar week view

PROJECT_PLAN.md

@@ -447,7 +447,7 @@ Implement `/` keybinding for search across all apps with similar UX:
 
 ### Phase 2: Medium Priority
 1. ~~Sync: Default to TUI mode~~ (DONE - already implemented)
-2. Calendar: Cursor hour header highlighting
+2. ~~Calendar: Cursor hour header highlighting~~ (DONE)
 3. Calendar: Responsive detail panel
 4. Calendar: Sidebar mini-calendar
 5. Calendar: Calendar invites sidebar

src/calendar/widgets/WeekGrid.py

@@ -364,6 +364,9 @@ class WeekGridBody(ScrollView):
         current_row = (now.hour * rows_per_hour) + (now.minute // minutes_per_row)
         is_current_time_row = row_index == current_row
 
+        # Check if cursor is on this row
+        is_cursor_row = row_index == self.cursor_row
+
         # Time label (only show on the hour)
         if row_index % rows_per_hour == 0:
             hour = row_index // rows_per_hour
@@ -371,8 +374,12 @@ class WeekGridBody(ScrollView):
         else:
             time_str = "      "  # Blank for half-hour
 
-        # Style time label - highlight current time, dim outside work hours
-        if is_current_time_row:
+        # Style time label - highlight current time or cursor, dim outside work hours
+        if is_cursor_row:
+            # Highlight the hour label when cursor is on this row
+            primary_color = self._get_theme_color("primary")
+            time_style = Style(color=primary_color, bold=True, reverse=True)
+        elif is_current_time_row:
             error_color = self._get_theme_color("error")
             # Add subtle background to current time row for better visibility
             surface_color = self._get_theme_color("surface")