The implementation is complete. Here's a summary of the changes made: (#1871)

## Summary

I've implemented the GitHub PR status display on `WorkspaceSummary.tsx`. The changes include:

### Backend Changes

1. **`crates/db/src/models/merge.rs`** - Added a new method `get_latest_pr_status_for_workspaces()` that efficiently queries the latest PR status for all workspaces grouped by archived status.

2. **`crates/server/src/routes/task_attempts/workspace_summary.rs`** - Added `pr_status: Option<MergeStatus>` field to the `WorkspaceSummary` struct and included the PR status query in the summary endpoint.

### Frontend Changes

3. **`frontend/src/components/ui-new/hooks/useWorkspaces.ts`** - Added `prStatus` to the `SidebarWorkspace` interface and mapped it in `toSidebarWorkspace()`.

4. **`frontend/src/components/ui-new/primitives/WorkspaceSummary.tsx`** - Added:
   - Import for `GitPullRequestIcon`
   - `prStatus` prop to the component
   - Display logic showing:
     - **PR open**: `GitPullRequestIcon` with `text-brand` (orange) color
     - **PR merged**: `GitPullRequestIcon` with `text-success` (green) color
     - **No PR/closed/unknown**: No icon displayed

5. **`frontend/src/components/ui-new/views/WorkspacesSidebar.tsx`** - Passed the `prStatus` prop to both active and archived workspace summaries.

### Generated Types

6. **`shared/types.ts`** - Auto-generated to include the new `pr_status` field in `WorkspaceSummary`.

frontend/src/components/ui-new/hooks/useWorkspaces.ts

@@ -25,6 +25,7 @@ export interface SidebarWorkspace {
   hasUnseenActivity?: boolean;
   latestProcessCompletedAt?: string;
   latestProcessStatus?: 'running' | 'completed' | 'failed' | 'killed';
+  prStatus?: 'open' | 'merged' | 'closed' | 'unknown';
 }
 
 // Keep the old export name for backwards compatibility
@@ -67,6 +68,7 @@ function toSidebarWorkspace(
     hasUnseenActivity: summary?.has_unseen_turns,
     latestProcessCompletedAt: summary?.latest_process_completed_at ?? undefined,
     latestProcessStatus: summary?.latest_process_status ?? undefined,
+    prStatus: summary?.pr_status ?? undefined,
   };
 }
 

frontend/src/components/ui-new/primitives/WorkspaceSummary.tsx

@@ -6,6 +6,7 @@ import {
   PlayIcon,
   FileIcon,
   CircleIcon,
+  GitPullRequestIcon,
 } from '@phosphor-icons/react';
 import { useTranslation } from 'react-i18next';
 import { cn } from '@/lib/utils';
@@ -27,6 +28,7 @@ interface WorkspaceSummaryProps {
   hasUnseenActivity?: boolean;
   latestProcessCompletedAt?: string;
   latestProcessStatus?: 'running' | 'completed' | 'failed' | 'killed';
+  prStatus?: 'open' | 'merged' | 'closed' | 'unknown';
   onClick?: () => void;
   className?: string;
   summary?: boolean;
@@ -48,6 +50,7 @@ export function WorkspaceSummary({
   hasUnseenActivity = false,
   latestProcessCompletedAt,
   latestProcessStatus,
+  prStatus,
   onClick,
   className,
   summary = false,
@@ -120,6 +123,20 @@ export function WorkspaceSummary({
               />
             )}
 
+            {/* PR status icon */}
+            {prStatus === 'open' && (
+              <GitPullRequestIcon
+                className="size-icon-xs text-brand shrink-0"
+                weight="fill"
+              />
+            )}
+            {prStatus === 'merged' && (
+              <GitPullRequestIcon
+                className="size-icon-xs text-success shrink-0"
+                weight="fill"
+              />
+            )}
+
             {/* Pin icon */}
             {isPinned && (
               <PushPinIcon

frontend/src/components/ui-new/views/WorkspacesSidebar.tsx

@@ -97,6 +97,7 @@ export function WorkspacesSidebar({
               hasUnseenActivity={workspace.hasUnseenActivity}
               latestProcessCompletedAt={workspace.latestProcessCompletedAt}
               latestProcessStatus={workspace.latestProcessStatus}
+              prStatus={workspace.prStatus}
               onClick={() => onSelectWorkspace(workspace.id)}
             />
           ))}
@@ -124,6 +125,7 @@ export function WorkspacesSidebar({
               hasUnseenActivity={workspace.hasUnseenActivity}
               latestProcessCompletedAt={workspace.latestProcessCompletedAt}
               latestProcessStatus={workspace.latestProcessStatus}
+              prStatus={workspace.prStatus}
               onClick={() => onSelectWorkspace(workspace.id)}
             />
           ))}