fix: half-width animated calorie widget, remove duplicate +, warm colors

- Calorie widget: half width with animated ring (spring animation)
- Removed floating + from dashboard (only on fitness tab)
- surfaceCard changed from white to warm white (#FFFCF8)
- AssistantChatView gets canvas background
- Future widget placeholder on right side of grid

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

ios/Platform/Platform/Features/Assistant/AssistantChatView.swift

@@ -88,6 +88,7 @@ struct AssistantChatView: View {
             .padding(.vertical, 10)
             .background(Color.surfaceCard)
         }
+        .background(Color.canvas)
         .onChange(of: vm.selectedPhoto) {
             Task { await vm.handlePhotoSelection() }
         }

ios/Platform/Platform/Features/Home/HomeView.swift

@@ -5,9 +5,10 @@ struct HomeView: View {
     @Environment(AuthManager.self) private var auth
     @State private var vm = HomeViewModel()
     @State private var showAssistant = false
+    @State private var ringAnimated = false
 
     var body: some View {
-        ZStack(alignment: .bottomTrailing) {
+        ZStack {
             // Background
             if let bg = vm.backgroundImage {
                 Image(uiImage: bg)
@@ -55,38 +56,24 @@ struct HomeView: View {
                     .padding(.horizontal)
                     .padding(.top, 60)
 
-                    // Calorie widget — full width card
+                    // Widget grid — half width
+                    HStack(spacing: 12) {
                         calorieWidget
+                        // Future widget placeholder — invisible spacer
+                        Color.clear
+                    }
                     .padding(.horizontal)
 
                     Spacer(minLength: 100)
                 }
             }
-
-            // Floating + button
-            Button {
-                showAssistant = true
-            } label: {
-                Image(systemName: "plus")
-                    .font(.title2.weight(.semibold))
-                    .foregroundStyle(.white)
-                    .frame(width: 56, height: 56)
-                    .background(Color.accentWarm)
-                    .clipShape(Circle())
-                    .shadow(color: Color.accentWarm.opacity(0.3), radius: 8, y: 4)
-            }
-            .padding(.trailing, 20)
-            .padding(.bottom, 100)
         }
         .navigationBarHidden(true)
-        .sheet(isPresented: $showAssistant) {
-            FoodSearchView(
-                date: Date().apiDateString,
-                onFoodAdded: { Task { await vm.loadTodayData() } }
-            )
-        }
         .task {
             await vm.loadTodayData()
+            withAnimation(.spring(response: 0.8, dampingFraction: 0.7)) {
+                ringAnimated = true
+            }
         }
         .onChange(of: vm.selectedPhoto) {
             Task { await vm.handlePhotoSelection() }
@@ -94,37 +81,43 @@ struct HomeView: View {
     }
 
     private var calorieWidget: some View {
-        HStack(spacing: 20) {
-            // Ring
-            MacroRingWithLabel(
-                consumed: vm.totalCalories,
-                goal: vm.calorieGoal,
-                label: "kcal",
-                color: .emerald,
-                size: 90,
-                lineWidth: 9
-            )
-            .frame(width: 90, height: 90)
-
-            // Text info
-            VStack(alignment: .leading, spacing: 6) {
+        VStack(spacing: 12) {
             Text("Calories")
-                    .font(.headline)
+                .font(.caption.weight(.semibold))
+                .foregroundStyle(vm.hasBackground ? .white.opacity(0.7) : Color.textTertiary)
+                .textCase(.uppercase)
+                .tracking(0.5)
+
+            // Animated ring
+            ZStack {
+                Circle()
+                    .stroke(Color.emerald.opacity(0.15), lineWidth: 9)
+
+                Circle()
+                    .trim(from: 0, to: ringAnimated ? min(max(vm.calorieGoal > 0 ? vm.totalCalories / vm.calorieGoal : 0, 0), 1) : 0)
+                    .stroke(Color.emerald, style: StrokeStyle(lineWidth: 9, lineCap: .round))
+                    .rotationEffect(.degrees(-90))
+                    .animation(.spring(response: 0.8, dampingFraction: 0.7), value: ringAnimated)
+
+                VStack(spacing: 1) {
+                    Text("\(Int(vm.totalCalories))")
+                        .font(.system(size: 22, weight: .bold, design: .rounded))
                         .foregroundStyle(vm.hasBackground ? .white : Color.textPrimary)
-
-                Text("\(Int(vm.totalCalories)) / \(Int(vm.calorieGoal))")
-                    .font(.subheadline.weight(.medium))
-                    .foregroundStyle(vm.hasBackground ? .white.opacity(0.8) : Color.textSecondary)
-
-                let remaining = max(vm.calorieGoal - vm.totalCalories, 0)
-                Text("\(Int(remaining)) remaining")
-                    .font(.caption)
+                    Text("/ \(Int(vm.calorieGoal))")
+                        .font(.system(size: 10, weight: .medium, design: .rounded))
                         .foregroundStyle(vm.hasBackground ? .white.opacity(0.6) : Color.textTertiary)
                 }
-
-            Spacer()
             }
-        .padding(20)
+            .frame(width: 80, height: 80)
+
+            let remaining = max(vm.calorieGoal - vm.totalCalories, 0)
+            Text("\(Int(remaining)) left")
+                .font(.caption2.weight(.medium))
+                .foregroundStyle(vm.hasBackground ? .white.opacity(0.6) : Color.textTertiary)
+        }
+        .padding(16)
+        .frame(maxWidth: .infinity)
+        .aspectRatio(1, contentMode: .fit)
         .background {
             if vm.hasBackground {
                 RoundedRectangle(cornerRadius: 16)

ios/Platform/Platform/Shared/Extensions/Color+Extensions.swift

@@ -9,7 +9,7 @@ extension Color {
     static let emerald = Color(red: 0.020, green: 0.588, blue: 0.412) // #059669
 
     // MARK: - Surfaces
-    static let surfaceCard = Color.white
+    static let surfaceCard = Color(red: 255/255, green: 252/255, blue: 248/255) // warm white
     static let surfaceSheet = Color(red: 0.98, green: 0.97, blue: 0.95)
 
     // MARK: - Text