fix: environment widget alignment and sun position night labels

- Consistent 170px minHeight across Weather, Air Quality, Forecast widgets
- Swap sunrise/sunset labels at night to match arc direction
- Weather header shows "Weather" instead of location

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

lib/shared/widgets/forecast_widget.dart

@@ -106,18 +106,23 @@ class ForecastWidget extends StatelessWidget {
                 ),
               ],
             ),
-            const SizedBox(height: 16),
+            const SizedBox(height: 8),
 
-            // Forecast days - horizontal scroll
-            SizedBox(
-              height: 100,
-              child: ListView.separated(
-                scrollDirection: Axis.horizontal,
-                itemCount: forecast!.length,
-                separatorBuilder: (_, i) => const SizedBox(width: 12),
-                itemBuilder: (context, index) {
-                  return _ForecastDayCard(day: forecast![index]);
-                },
+            // Content area with minimum height to match other widgets
+            ConstrainedBox(
+              constraints: const BoxConstraints(minHeight: 170),
+              child: Center(
+                child: SizedBox(
+                  height: 110,
+                  child: ListView.separated(
+                    scrollDirection: Axis.horizontal,
+                    itemCount: forecast!.length,
+                    separatorBuilder: (_, i) => const SizedBox(width: 12),
+                    itemBuilder: (context, index) {
+                      return _ForecastDayCard(day: forecast![index]);
+                    },
+                  ),
+                ),
               ),
             ),
           ],