Promote nvrsion trunk → dev

Squash-promote the nucleic/trunk work (Sessions Auto-Switching, Play
System Sounds Configuration) into dev. Resolved the two divergent
conflicts where dev and trunk had independently implemented the chat
status-sound feature, keeping trunk's canonical version:

- SettingsView: the Sounds settings live under the General tab (trunk's
  placement); removed dev's duplicate Sounds section from the Chat tab.
- AppStore: adopt trunk's centralized ChatCueState/announceChatCue
  edge-detection (fired from upsertSummary/upsertSummaries), and remove
  dev's superseded chatStatusSound(...) helper and its two hand-placed
  call sites. Also removed a silent merge-duplicated upsertSummaries.

Nucleic-Promote: 1
Co-authored-by: Nucleic <[email protected]>
Co-Authored-By: Claude Opus 4.8 <[email protected]>

NucleicRemote/NucleicRemote/Views/HomeView.swift

@@ -192,6 +192,9 @@ struct ActivityGrid: View {
         let weekday = cal.component(.weekday, from: today)
         let startOfWeek = cal.date(byAdding: .day, value: -(weekday - 1), to: today)!
         let gridStart = cal.date(byAdding: .day, value: -7 * (weeks - 1), to: startOfWeek)!
+        // Brightness relative to *this user's* activity, outliers excluded so a few marathon
+        // days don't crush the everyday range. Computed once for the whole grid (mirrors Mac).
+        let scale = ActivityScale(activityByDay: activityByDay)
         return HStack(alignment: .top, spacing: gap) {
             ForEach(0..<weeks, id: \.self) { col in
                 VStack(spacing: gap) {
@@ -202,7 +205,7 @@ struct ActivityGrid: View {
                         RoundedRectangle(cornerRadius: 2)
                             .fill(isFuture ? Color.clear
                                 : isFrozen ? Palette.frozen
-                                : Palette.activity(level: Self.level(activityByDay[date] ?? 0)))
+                                : Palette.activity(intensity: scale.intensity(for: activityByDay[date] ?? 0)))
                             .frame(width: cell, height: cell)
                     }
                 }
@@ -210,13 +213,4 @@ struct ActivityGrid: View {
         }
         .frame(maxWidth: .infinity, alignment: .leading)
     }
-
-    static func level(_ count: Int) -> Int {
-        switch count {
-        case 0: 0
-        case 1...2: 1
-        case 3...5: 2
-        default: 3
-        }
-    }
 }

NucleicRemote/NucleicRemote/Views/SessionDetailView.swift

@@ -105,7 +105,10 @@ struct SessionDetailView: View {
                        // No explicit model yet → use the session backend's default, so the menu
                        // shows that backend's effort range rather than collapsing to one level.
                        modelSKU: summary.model ?? store.modelCatalog.models(for: summary.backend).first?.sku,
-                       controlled: controlled)
+                       controlled: controlled,
+                       // Orchestra is a one-way latch for an existing chat — the host won't turn it
+                       // off, so disable the other levels here to match.
+                       lockWhenOrchestra: true)
             Spacer(minLength: 4)
             if let percent = contextPercent {
                 Label("\(percent)%", systemImage: "gauge.with.dots.needle.33percent")

NucleicRemote/NucleicRemote/Views/Theme.swift

@@ -44,6 +44,13 @@ enum Palette {
         default: success
         }
     }
+
+    /// Activity-grid shade for a continuous brightness in `0…1` (relative to the user's own
+    /// activity, outliers excluded — see `ActivityScale`). `0` is an empty day's neutral gray.
+    /// Mirrors the Mac's `AppPalette.activity(intensity:)`.
+    static func activity(intensity: Double) -> Color {
+        intensity <= 0 ? Color.secondary.opacity(0.15) : success.opacity(intensity)
+    }
 }
 
 /// Status glyph + label, matching the Mac semantics (UX_MACOS §1).
@@ -240,6 +247,10 @@ struct EffortMenu: View {
     var modelSKU: String? = nil
     /// Whether the target project is under Nucleic Control (gates Orchestra).
     var controlled: Bool = false
+    /// Latch Orchestra on once it's active: for an existing chat the host refuses to turn Orchestra
+    /// off (`SessionController.setEffort`), so the other levels are disabled to match. Left off for
+    /// new-chat composition, where the choice isn't committed yet and can still be changed.
+    var lockWhenOrchestra: Bool = false
 
     private var levels: [String] { catalog.offeredEfforts(forModel: modelSKU) }
     private var sentinel: String { catalog.orchestraSentinelOrFallback }
@@ -258,6 +269,9 @@ struct EffortMenu: View {
         return levels.contains(effort) ? effort : (levels.last ?? MobileEfforts.fallback)
     }
 
+    /// Once Orchestra is latched on for an existing chat, the ordinary levels can't be chosen.
+    private var locked: Bool { lockWhenOrchestra && orchestraActive }
+
     var body: some View {
         Menu {
             ForEach(levels, id: \.self) { level in
@@ -265,6 +279,7 @@ struct EffortMenu: View {
                     if effort == level { Label(display(level), systemImage: "checkmark") }
                     else { Text(display(level)) }
                 }
+                .disabled(locked)
             }
             Divider()
             Button { effort = sentinel } label: {