## 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`.
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