Settings/widget: drop decorative emoji; show real bundle version

- Remove 🎉 from the My Tasks widget empty state.
- Remove 𝕏 👾 📸 from Settings → Follow Us row.
- About row and About sheet now read the version from the bundle
  (new Bundle.marketingVersion / buildNumber / versionDisplay helpers)
  instead of a hardcoded "v1.0.0", so it always tracks the real build.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

KisaniCalWidgets/MyTasksWidget.swift

@@ -111,7 +111,7 @@ struct MyTasksView: View {
 
             if entry.tasks.isEmpty {
                 Spacer()
-                Text("All clear for today 🎉")
+                Text("All clear for today")
                     .font(.system(.caption, design: .monospaced))
                     .foregroundColor(Color(white: 0.5))
                     .frame(maxWidth: .infinity, alignment: .center)