Bottom Tab Bar Visibility Adjustment

Nucleic-Session: 747527BF-AEE9-4939-BE70-A14F1F3BBBA8
Co-authored-by: Nucleic <[email protected]>

NucleicRemote/NucleicRemote/Views/Composer.swift

@@ -129,41 +129,15 @@ struct StartChatComposer: View {
     }
 }
 
-/// The sheet the floating "+" opens: the glass `StartChatComposer` in a compact panel. `project`
+/// The floating "+" start-chat affordance: a Liquid Glass circle in the lower-right that reveals
-/// scopes it to one project (a project page's "+"); nil offers the picker (Home, Sessions).
+/// the glass `StartChatComposer` as a floating bar over the page — the same entry box the open
-struct NewChatSheet: View {
+/// session carries, not a full modal pane. Shared by Home, Sessions, and a project page (which
-    var project: WireProject? = nil
+/// scopes it to `project`), so all three offer the same control.
-    var dismiss: () -> Void
-
-    var body: some View {
-        NavigationStack {
-            ScrollView {
-                StartChatComposer(onStart: dismiss, lockedProject: project)
-                    .padding()
-            }
-            .navigationTitle("New chat")
-            .navigationBarTitleDisplayMode(.inline)
-            .toolbar {
-                ToolbarItem(placement: .topBarLeading) {
-                    Button("Cancel") { dismiss() }
-                }
-            }
-        }
-        // The composer needs only a fraction of the screen — a compact height by default, still
-        // expandable if the advanced options are opened.
-        .presentationDetents([.height(360), .large])
-        .presentationDragIndicator(.visible)
-    }
-}
-
-/// The floating "+" start-chat affordance: a Liquid Glass circle in the lower-right that opens the
-/// `NewChatSheet`. Shared by Home, Sessions, and a project page (which scopes it to `project`), so
-/// all three offer the same control instead of an inline composer card.
 struct NewChatAffordance: ViewModifier {
     @EnvironmentObject var store: RemoteStore
     /// Scopes the composer to one project (project page); nil offers the picker (Home, Sessions).
     var project: WireProject? = nil
-    /// Owned by the caller so it can also open the sheet programmatically (iPad ⌘N on Home).
+    /// Owned by the caller so it can also open the composer programmatically (iPad ⌘N on Home).
     @Binding var isPresented: Bool
 
     /// The button only makes sense when this device can control a Mac and there's a project to
@@ -174,8 +148,9 @@ struct NewChatAffordance: ViewModifier {
 
     func body(content: Content) -> some View {
         content
+            // The "+" disc — hidden while the composer is up so it doesn't sit over the bar.
             .overlay(alignment: .bottomTrailing) {
-                if canStart {
+                if canStart && !isPresented {
                     Button { isPresented = true } label: {
                         Image(systemName: "plus")
                             .font(.system(size: 22, weight: .semibold))
@@ -190,14 +165,30 @@ struct NewChatAffordance: ViewModifier {
                     .buttonStyle(.plain)
                     .padding(.trailing, 20)
                     .padding(.bottom, 6)
+                    .transition(.scale.combined(with: .opacity))
                     .accessibilityLabel("New chat")
                 }
             }
-            .sheet(isPresented: $isPresented) {
+            // The composer itself, floating up from the bottom over a light scrim — no modal pane,
-                NewChatSheet(project: project) { isPresented = false }
+            // no nav chrome, just the entry box. Tapping the scrim dismisses it.
+            .overlay {
+                if isPresented {
+                    ZStack(alignment: .bottom) {
+                        Rectangle()
+                            .fill(.black.opacity(0.2))
+                            .ignoresSafeArea()
+                            .transition(.opacity)
+                            .onTapGesture { isPresented = false }
+                        StartChatComposer(onStart: { isPresented = false }, lockedProject: project)
+                            .padding(.horizontal, 12)
+                            .padding(.bottom, 8)
+                            .transition(.move(edge: .bottom).combined(with: .opacity))
                     }
                 }
             }
+            .animation(.spring(response: 0.35, dampingFraction: 0.86), value: isPresented)
+    }
+}
 
 extension View {
     /// Add the floating "+" start-chat affordance (glass circle → glass composer sheet). See