fix: resolve conflicts for PR #457

Merge prgs/master into PR branch.

docs/webui-local-dev.md

@@ -46,7 +46,8 @@ Optional environment variables:
 | `/runtime` | Stub — MCP runtime health (#430) |
 | `/audit` | Stub — report audit paste (#431) |
 | `/worktrees` | Stub — hygiene dashboard (#432) |
-| `/leases` | Stub — lease visibility (#433) |
+| `/leases` | Lease and collision visibility (#433) |
+| `/api/leases` | JSON lease/collision export |
 
 All routes are GET-only. POST/PUT/PATCH/DELETE return `405` with
 `read-only-mvp`.
@@ -102,4 +103,16 @@ Or invoke unittest directly:
 
 ```bash
 python3 -m unittest discover -s tests -p 'test_webui_*.py' -q
+## Lease visibility (#433)
+
+`/leases` surfaces read-only lease and collision state: local issue lock file,
+in-progress claim inventory (#268), reviewer PR lease comments when present
+(`<!-- mcp-review-lease:v1 -->`, #407), duplicate open PRs per issue (#400),
+and duplicate local branches per issue. Links to collision-history backend
+issues (#267, #268, #400, #407) are included. No lease acquire/release from UI.
+
+## Tests
+
+```bash
+pytest tests/test_webui_skeleton.py tests/test_webui_project_registry.py tests/test_webui_prompt_library.py tests/test_webui_queue_dashboard.py tests/test_webui_lease_visibility.py -q
 ```