Minimize Dynamic Island, show direction letters instead of signs, fix inverted pitch bubble

- Dynamic Island now shows only the level icon (compact/minimal); the
  bubble, instruction text, and numbers move to the shared lock
  screen/CarPlay ActivityView, which iOS renders identically on both
  surfaces (no separate CarPlay layout API exists for this).
- Replace +/- signs with a leading direction letter (H/F for Heck-
  Front, R/L for rechts-links) via a new shared LevelDirectionFormatting
  helper, used by the level screen, alignment assistant, and dashboard
  card. The generic "Messwerte" list keeps raw signed values.
- Live Activity's instruction now reads as two lines ("Heck steht
  höher 1.8°" / "links steht höher 0.9°") instead of a sentence plus a
  separate number column.
- Fix the bubble level graphic's pitch axis being inverted (front/rear
  reversed) in all three copies (app, watch, Live Activity widget) —
  confirmed against the known-correct VehicleTiltView orientation.
- Dashboard card shows pitch and roll side by side, large, without the
  "Längsneigung"/"Querneigung" labels, for the leveling device.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

CamperMonitor/Views/DeviceCard.swift

@@ -13,6 +13,8 @@ struct DeviceCard: View {
 
             if isShowingLastSettings, let snapshot {
                 lastSettings(for: snapshot)
+            } else if let snapshot, snapshot.primaryMetric != nil, device.role == .leveling {
+                levelReadout(for: snapshot)
             } else if let snapshot, let primary = snapshot.primaryMetric {
                 HStack(alignment: .firstTextBaseline, spacing: 4) {
                     Text(primary.formatted)
@@ -115,6 +117,21 @@ struct DeviceCard: View {
         }
     }
 
+    /// Für die Nivellierung: Front/Heck und links/rechts nebeneinander, groß,
+    /// ohne "Längsneigung"/"Querneigung"-Beschriftung – die Richtung steht ja
+    /// schon im vorangestellten Buchstaben.
+    private func levelReadout(for snapshot: DeviceSnapshot) -> some View {
+        let pitch = snapshot.metrics.first(where: { $0.key == "pitch" })?.value
+        let roll = snapshot.metrics.first(where: { $0.key == "roll" })?.value
+        return HStack(spacing: 24) {
+            Text(LevelDirectionFormatting.pitchTile(pitch))
+            Text(LevelDirectionFormatting.rollTile(roll))
+        }
+        .font(.system(size: 36, weight: .semibold, design: .rounded))
+        .contentTransition(.numericText())
+        .foregroundStyle(snapshot.isStale ? .secondary : .primary)
+    }
+
     private func secondaryValues(for snapshot: DeviceSnapshot) -> some View {
         let others = snapshot.metrics
             .filter { $0.id != snapshot.primaryMetric?.id && $0.value != nil }