Merge pull request 'fix(ui): restore Alerts sidebar row selection (Issue #34)' (#38) from fix/34-alerts-sidebar-badge into milestone/m6-bugfix-stability

Applying .badge after .tag on a List(selection:) row wrapped the tagged
label in a view that no longer carried the tag, making the "Alerts &
Notifications" row unselectable on macOS 14. Replaced with an explicit
Label + HStack row showing the active-alert count as a styled capsule —
tag stays on the row, count still renders when alerts are active.

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Sources/UI/ContentView.swift

@@ -87,9 +87,25 @@ public struct ContentView: View {
             }
             
             Section("Intelligence") {
-                Label("Alerts & Notifications", systemImage: "bell.badge")
-                    .tag("Alerts")
-                    .badge(store.alertEngine.activeAlerts.isEmpty ? nil : Text("\(store.alertEngine.activeAlerts.count)"))
+                // Custom row instead of .badge() — a badge applied after .tag
+                // detaches the tag from the list row and makes it unselectable.
+                Label {
+                    HStack {
+                        Text("Alerts & Notifications")
+                        Spacer()
+                        if !store.alertEngine.activeAlerts.isEmpty {
+                            Text("\(store.alertEngine.activeAlerts.count)")
+                                .font(.caption2.weight(.semibold))
+                                .padding(.horizontal, 6)
+                                .padding(.vertical, 2)
+                                .background(Color.red.opacity(0.85), in: Capsule())
+                                .foregroundStyle(.white)
+                        }
+                    }
+                } icon: {
+                    Image(systemName: "bell.badge")
+                }
+                .tag("Alerts")
             }
         }
         .listStyle(.sidebar)