feat(FN-3567): sync allowParallelExecution runtime toggle

Fixes FN-3567 by synchronizing the `allowParallelExecution` runtime toggle in the AgentDetailView component, adding one line to keep the setting in sync.

Fusion-Task-Id: FN-3567

docs/agents.md

@@ -237,6 +237,7 @@ The `runtimeConfig` field on agents supports the following options:
 | `autoClaimRelevantTasks` | `boolean` | `true` | During no-task heartbeats, opportunistically claim unowned relevant todo tasks that align with the agent's role/soul |
 | `heartbeatTimeoutMs` | `number` | — | Time without heartbeat before agent is considered unresponsive (ms) |
 | `maxConcurrentRuns` | `number` | `1` | Max concurrent heartbeat runs for this agent |
+| `allowParallelExecution` | `boolean` | `true` (when unset) | Permanent agents only. When `false`, heartbeat and executor paths serialize symmetrically: a heartbeat will not start while the agent's bound task has an active executor session, and an executor session will not start while the agent has an active heartbeat run |
 | `messageResponseMode` | `"immediate" \| "on-heartbeat"` | `"immediate"` | Whether agent wakes immediately on message (immediate) or processes during heartbeat (on-heartbeat). See [Heartbeat Run Mailbox Checking](#heartbeat-run-mailbox-checking) |
 | `selfImproveEnabled` | `boolean` | `true` | Enable periodic self-improvement reflection prompts during heartbeat runs |
 | `selfImproveIntervalMs` | `number` | `14400000` (4h) | Minimum delay between self-improvement cycles (minimum enforced: 3600000 ms) |
@@ -248,6 +249,8 @@ The `runtimeConfig` field on agents supports the following options:
 Heartbeat values are validated and minimum-clamped to 5 minutes (300,000 ms).
 Project setting `heartbeatMultiplier` (default `1`) scales resolved heartbeat intervals globally; per-agent `heartbeatIntervalMs` remains the base interval before multiplier scaling. This setting is configured from the **Agents** screen's **Controls** popup under "Heartbeat Speed".
 
+`allowParallelExecution` defaults to `true` when unset; setting it to `false` is serialized explicitly so operators can enforce non-parallel heartbeat/executor behavior for that permanent agent.
+
 ### No-task auto-claim behavior
 
 When an identity-bearing, non-ephemeral agent wakes with no assigned task and `runtimeConfig.autoClaimRelevantTasks !== false`, the heartbeat monitor scans open todo tasks and may claim one before constructing the prompt run.

docs/dashboard-guide.md

@@ -131,7 +131,7 @@ Todo View is an experimental dashboard surface for managing per-project todo lis
 > Available when `experimentalFeatures.todoView` is enabled.
 
 Navigation:
-- Desktop: **Header → More views → Todos**
+- Desktop: **Header → More views → Todos** (single canonical desktop entry)
 - Mobile: **More** sheet → **Todos**
 
 For full behavior, API contracts, and storage details, use the canonical [Todo View guide](./todo-view.md).

docs/settings-reference.md

@@ -751,6 +751,8 @@ Common heartbeat/runtime keys on `runtimeConfig` include:
 | `heartbeatTimeoutMs` | `number` | Per-agent heartbeat timeout |
 | `maxConcurrentRuns` | `number` | Per-agent concurrent heartbeat limit |
 | `messageResponseMode` | `"immediate" \| "on-heartbeat"` | Wake on message immediately or process during periodic heartbeat |
+| `runMissedHeartbeatOnStartup` | `boolean` | Fire one startup catch-up heartbeat when the last tick was missed while the server was down (default `false`) |
+| `allowParallelExecution` | `boolean` | Permanent agents only. Default `true` when unset. Set `false` to serialize heartbeat and executor sessions symmetrically (heartbeat won't start while executor is active, and executor won't start while heartbeat is active); `false` is explicitly persisted while unset/`true` keeps parallel behavior |
 | `selfImproveEnabled` | `boolean` | Enables periodic self-improvement prompts |
 | `selfImproveIntervalMs` | `number` | Delay between self-improvement cycles (default 4h, minimum 1h) |
 | `lastSelfImproveAt` | `string` | Last self-improvement checkpoint timestamp (managed by heartbeat monitor) |

docs/todo-view.md

@@ -37,7 +37,7 @@ Behavior when disabled:
 
 When enabled:
 
-- Desktop: header overflow menu (**More views**) → **Todos**
+- Desktop: header overflow menu (**More views**) → **Todos** (the only desktop Todos navigation entry)
 - Mobile: **More** sheet in the mobile nav bar → **Todos**
 
 ## List management

packages/dashboard/app/components/AgentDetailView.tsx

@@ -3306,6 +3306,7 @@ function ConfigTab({
     setHeartbeatEnabled(deriveHeartbeatEnabled(agent.runtimeConfig));
     setAutoClaimRelevantTasksEnabled(deriveAutoClaimRelevantTasksEnabled(agent.runtimeConfig));
     setRunMissedHeartbeatOnStartup(deriveRunMissedHeartbeatOnStartup(agent.runtimeConfig));
+    setAllowParallelExecution(deriveAllowParallelExecution(agent.runtimeConfig));
     setBudgetValues(deriveBudgetValues(agent.runtimeConfig));
     setModelValue(initialModelValue);
     setSelectedRuntimeId(initialRuntimeHint);

packages/dashboard/app/components/Header.tsx

@@ -1473,17 +1473,6 @@ export function Header({
           </button>
         )}
 
-        {!isCompact && todosEnabled && onOpenTodos && (
-          <button
-            className={`btn-icon${todosOpen ? " btn-icon--active" : ""}`}
-            onClick={onOpenTodos}
-            title="Open todos"
-            data-testid="todos-toggle-btn"
-          >
-            <CheckSquare size={16} />
-          </button>
-        )}
-
         {/* Git Manager button - desktop only (moved to overflow on mobile/tablet) */}
         {!isCompact && onOpenGitManager && (
           <button

packages/dashboard/app/components/__tests__/App.test.tsx

@@ -1687,10 +1687,11 @@ describe("App view switching", () => {
     render(<App />);
 
     await waitFor(() => {
-      expect(screen.getByTestId("todos-toggle-btn")).toBeInTheDocument();
+      expect(screen.getByTestId("view-toggle-overflow-trigger")).toBeInTheDocument();
     });
 
-    fireEvent.click(screen.getByTestId("todos-toggle-btn"));
+    fireEvent.click(screen.getByTestId("view-toggle-overflow-trigger"));
+    fireEvent.click(screen.getByTestId("view-overflow-todos"));
 
     await waitFor(() => {
       expect(screen.getByTestId("todo-view")).toBeInTheDocument();

packages/dashboard/app/components/__tests__/Header.test.tsx

@@ -381,21 +381,27 @@ describe("Header", () => {
     });
   });
 
-  describe("todos button", () => {
+  describe("todos navigation", () => {
-    it("renders todos button on desktop when enabled", () => {
+    it("shows Todos only in More views on desktop when enabled", () => {
-      renderHeader({ onOpenTodos: vi.fn(), todosEnabled: true }, "desktop");
+      renderHeader({ onChangeView: noop, onOpenTodos: vi.fn(), todosEnabled: true }, "desktop");
-      expect(screen.getByTitle("Open todos")).toBeDefined();
+      expect(screen.queryByTestId("todos-toggle-btn")).toBeNull();
+
+      fireEvent.click(screen.getByTestId("view-toggle-overflow-trigger"));
+      expect(screen.getAllByText("Todos")).toHaveLength(1);
+      expect(screen.getByTestId("view-overflow-todos")).toBeInTheDocument();
     });
 
-    it("does not render todos button when disabled", () => {
+    it("does not show Todos entry in More views when disabled", () => {
-      renderHeader({ onOpenTodos: vi.fn(), todosEnabled: false }, "desktop");
+      renderHeader({ onChangeView: noop, onOpenTodos: vi.fn(), todosEnabled: false }, "desktop");
-      expect(screen.queryByTitle("Open todos")).toBeNull();
+      fireEvent.click(screen.getByTestId("view-toggle-overflow-trigger"));
+      expect(screen.queryByTestId("view-overflow-todos")).toBeNull();
     });
 
-    it("calls onOpenTodos when clicked", () => {
+    it("calls onOpenTodos from More views", () => {
       const onOpenTodos = vi.fn();
-      renderHeader({ onOpenTodos, todosEnabled: true }, "desktop");
+      renderHeader({ onChangeView: noop, onOpenTodos, todosEnabled: true }, "desktop");
-      fireEvent.click(screen.getByTitle("Open todos"));
+      fireEvent.click(screen.getByTestId("view-toggle-overflow-trigger"));
+      fireEvent.click(screen.getByTestId("view-overflow-todos"));
       expect(onOpenTodos).toHaveBeenCalled();
     });
   });

packages/dashboard/app/components/__tests__/MobileNavBar.test.tsx

@@ -105,6 +105,22 @@ describe("MobileNavBar", () => {
     expect(screen.queryByTestId("mobile-nav-tab-skills")).toBeNull();
   });
 
+  it("keeps Todos in the mobile More sheet when todoView is enabled", () => {
+    const onOpenTodos = vi.fn();
+    render(
+      <MobileNavBar
+        {...createDefaultProps()}
+        onOpenTodos={onOpenTodos}
+        experimentalFeatures={{ todoView: true }}
+      />,
+    );
+
+    fireEvent.click(screen.getByTestId("mobile-nav-tab-more"));
+    fireEvent.click(screen.getByTestId("mobile-more-item-todos"));
+
+    expect(onOpenTodos).toHaveBeenCalled();
+  });
+
   it("renders dependency graph as a top-level tab and keeps additional plugin views in More", () => {
     const props = createDefaultProps();
     render(