fix(FN-2159): hide manual PR controls for auto-merge tasks

- Add an autoMerge prop to PrSection and show an auto-merge hint instead of manual PR actions
- Pass project autoMerge settings from TaskDetailModal into PrSection
- Preserve active automation messaging when PR creation is already in progress
- Expand PrSection tests to cover auto-merge enabled and disabled behavior
- Increase core RunMutationContext log entry bounds test timeout to reduce flakiness

packages/core/src/store.test.ts

@@ -8598,7 +8598,7 @@ describe("RunMutationContext", () => {
       await rm(localRoot, { recursive: true, force: true });
       await rm(localGlobal, { recursive: true, force: true });
     }
-  });
+  }, 20_000);
 
   it("addComment() with runContext includes runContext in log entry", async () => {
     const localRoot = makeTmpDir();

packages/dashboard/app/components/PrSection.tsx

@@ -9,6 +9,7 @@ interface PrSectionProps {
   projectId?: string;
   prInfo?: PrInfo;
   automationStatus?: string | null;
+  autoMerge?: boolean;
   hasGitHubToken: boolean;
   onPrCreated: (prInfo: PrInfo) => void;
   onPrUpdated: (prInfo: PrInfo) => void;
@@ -26,6 +27,7 @@ export function PrSection({
   projectId,
   prInfo,
   automationStatus,
+  autoMerge = false,
   hasGitHubToken,
   onPrCreated,
   onPrUpdated,
@@ -91,6 +93,20 @@ export function PrSection({
       );
     }
 
+    if (autoMerge) {
+      return (
+        <div className="pr-section">
+          <h4>
+            <GitPullRequest size={16} className="pr-section-icon" />
+            Pull Request
+          </h4>
+          <div className="pr-hint pr-hint--muted">
+            Auto-merge will handle this task automatically.
+          </div>
+        </div>
+      );
+    }
+
     if (showCreateForm) {
       return (
         <div className="pr-section">

packages/dashboard/app/components/TaskDetailModal.tsx

@@ -1655,6 +1655,7 @@ export function TaskDetailModal({
               projectId={projectId}
               prInfo={task.prInfo}
               automationStatus={task.status ?? null}
+              autoMerge={settings?.autoMerge ?? false}
               hasGitHubToken={githubTokenConfigured ?? false}
               onPrCreated={(prInfo) => {
                 // Update task locally to show new PR

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

@@ -151,6 +151,76 @@ describe("PrSection", () => {
     });
   });
 
+  describe("when autoMerge is enabled", () => {
+    it("hides manual PR controls and shows auto-merge messaging when no PR exists", () => {
+      render(
+        <PrSection
+          taskId="FN-001"
+          autoMerge={true}
+          hasGitHubToken={true}
+          onPrCreated={mockOnPrCreated}
+          onPrUpdated={mockOnPrUpdated}
+          addToast={mockAddToast}
+        />
+      );
+
+      expect(screen.queryByRole("button", { name: "Create PR" })).toBeNull();
+      expect(screen.queryByText(/GITHUB_TOKEN env var/i)).toBeNull();
+      expect(screen.getByText("Auto-merge will handle this task automatically.")).toBeDefined();
+    });
+
+    it("does not show GitHub token hint when auto-merge is enabled and token is missing", () => {
+      render(
+        <PrSection
+          taskId="FN-001"
+          autoMerge={true}
+          hasGitHubToken={false}
+          onPrCreated={mockOnPrCreated}
+          onPrUpdated={mockOnPrUpdated}
+          addToast={mockAddToast}
+        />
+      );
+
+      expect(screen.queryByText(/GITHUB_TOKEN env var/i)).toBeNull();
+      expect(screen.getByText("Auto-merge will handle this task automatically.")).toBeDefined();
+    });
+
+    it("still shows the creating-pr automation message when automation is active", () => {
+      render(
+        <PrSection
+          taskId="FN-001"
+          autoMerge={true}
+          automationStatus="creating-pr"
+          hasGitHubToken={false}
+          onPrCreated={mockOnPrCreated}
+          onPrUpdated={mockOnPrUpdated}
+          addToast={mockAddToast}
+        />
+      );
+
+      expect(screen.getByText(/creating a pull request automatically/i)).toBeDefined();
+      expect(screen.queryByText("Auto-merge will handle this task automatically.")).toBeNull();
+      expect(screen.queryByRole("button", { name: "Create PR" })).toBeNull();
+    });
+
+    it("preserves manual PR creation behavior when auto-merge is disabled", () => {
+      render(
+        <PrSection
+          taskId="FN-001"
+          autoMerge={false}
+          hasGitHubToken={false}
+          onPrCreated={mockOnPrCreated}
+          onPrUpdated={mockOnPrUpdated}
+          addToast={mockAddToast}
+        />
+      );
+
+      expect(screen.getByRole("button", { name: "Create PR" })).toBeDefined();
+      expect(screen.getByText(/GITHUB_TOKEN env var/i)).toBeDefined();
+      expect(screen.queryByText("Auto-merge will handle this task automatically.")).toBeNull();
+    });
+  });
+
   describe("when task has a PR", () => {
     it("displays PR info for open PR", () => {
       render(