Match Apple Music: full-width tab bar + large title; bump to 2.5

- Bottom tab bar: replace the floating capsule (which had space below it and
  was too thin) with a full-width frosted-glass bar at the standard iOS tab
  bar height, sitting flush above the home indicator — matching Apple Music.
- Landing page title: use .large navigation title so 'Pull Requests' aligns at
  the top like Apple Music's 'Inicio', instead of the inline title.
- Bump to 2.5.

GiteaPR/Views/InboxView.swift

@@ -38,6 +38,7 @@ struct InboxView: View {
                 }
             }
             .navigationTitle("Pull Requests")
+            .navigationBarTitleDisplayMode(.large)
             .toolbar {
                 ToolbarItem(placement: .primaryAction) { settingsButton }
             }