feat: bottom-aligned widgets and wind direction

- All environment widgets align content from bottom for visual harmony
- Wind chip now shows direction (e.g., "SE 14 km/h")

🤖 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

@@ -108,10 +108,11 @@ class ForecastWidget extends StatelessWidget {
             ),
             const SizedBox(height: 8),
 
-            // Content area with minimum height to match other widgets
-            ConstrainedBox(
-              constraints: const BoxConstraints(minHeight: 170),
-              child: Center(
+            // Content area with fixed height, content aligned to bottom
+            SizedBox(
+              height: 170,
+              child: Align(
+                alignment: Alignment.bottomCenter,
                 child: SizedBox(
                   height: 110,
                   child: ListView.separated(