feat: widget has two tap targets — fitness + add food

Widget background tap → platform://fitness → opens Fitness tab
Widget + button tap → platform://add-food → opens Fitness + food assistant

Small widget: + button in bottom-right corner (emerald green)
Medium widget: + button in bottom-right corner
Lock screen widgets: single tap → fitness (no room for + button)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

ios/Platform/Platform/ContentView.swift

@@ -121,9 +121,15 @@ struct MainTabView: View {
             AssistantSheetView(onFoodAdded: foodAdded)
         }
         .onOpenURL { url in
-            if url.scheme == "platform" && url.host == "add-food" {
-                selectedTab = 1 // Fitness tab
+            guard url.scheme == "platform" else { return }
+            switch url.host {
+            case "fitness":
+                selectedTab = 1
+            case "add-food":
+                selectedTab = 1
                 showAssistant = true
+            default:
+                break
             }
         }
         .task {

ios/Platform/PlatformWidget/PlatformWidget.swift

@@ -184,14 +184,23 @@ struct SmallWidgetView: View {
     let entry: CalorieEntry
 
     var body: some View {
+        ZStack(alignment: .bottomTrailing) {
             VStack(spacing: 8) {
-            CalorieRingView(entry: entry, size: 90, lineWidth: 8)
+                CalorieRingView(entry: entry, size: 80, lineWidth: 7)
 
                 Text("\(Int(entry.remaining)) left")
                     .font(.caption2.weight(.medium))
                     .foregroundStyle(.secondary)
             }
             .frame(maxWidth: .infinity, maxHeight: .infinity)
+
+            // + button — separate tap target → opens food assistant
+            Link(destination: URL(string: "platform://add-food")!) {
+                Image(systemName: "plus.circle.fill")
+                    .font(.title2)
+                    .foregroundStyle(Color(red: 0.020, green: 0.588, blue: 0.412))
+            }
+        }
     }
 }
 
@@ -199,6 +208,7 @@ struct MediumWidgetView: View {
     let entry: CalorieEntry
 
     var body: some View {
+        ZStack(alignment: .bottomTrailing) {
             HStack(spacing: 20) {
                 CalorieRingView(entry: entry, size: 100, lineWidth: 9)
 
@@ -217,6 +227,13 @@ struct MediumWidgetView: View {
                 }
             }
             .frame(maxWidth: .infinity, maxHeight: .infinity)
+
+            Link(destination: URL(string: "platform://add-food")!) {
+                Image(systemName: "plus.circle.fill")
+                    .font(.title2)
+                    .foregroundStyle(Color(red: 0.020, green: 0.588, blue: 0.412))
+            }
+        }
     }
 }
 
@@ -290,7 +307,7 @@ struct PlatformWidget: Widget {
     var body: some WidgetConfiguration {
         StaticConfiguration(kind: kind, provider: CalorieProvider()) { entry in
             PlatformWidgetEntryView(entry: entry)
-                .widgetURL(URL(string: "platform://add-food"))
+                .widgetURL(URL(string: "platform://fitness"))
                 .containerBackground(.fill.tertiary, for: .widget)
         }
         .configurationDisplayName("Calories")