docs: remove windows-setup-only branch notes; portable target restored

docs/pull-requests/OPENPETS_3_1_0_FIXES_PULL_REQUESTS.md

@@ -93,24 +93,11 @@ Target branch for each PR: a base that already includes `03ae162` (e.g. `v3.1.0-
 
 ---
 
-## 7. Windows build target: setup only
-- **Branch:** `chore/windows-setup-only`
-- **Commit:** `837dcc4`
-- **Files:** `apps/desktop/electron-builder.yml`, `docs/pull-requests/OPENPETS_3_1_0_FIXES_PULL_REQUESTS.md`
-- **What changed:**
-  - Removed the `portable` target from `electron-builder.yml`.
-  - The Windows release now builds only the NSIS full-setup installer (`OpenPets-${version}-win-${arch}-setup.exe`).
-- **GitHub compare (vs `e4d6536`):** https://github.com/verticaltension/openpetswithchatandmcp/compare/e4d6536...chore/windows-setup-only
-- **Forgejo compare (vs `e4d6536`):** https://git.scriptoriumai.io/scriptoriumadmin/openpetswithchatandmcp/compare/e4d6536...chore/windows-setup-only
-
----
-
 ## Verification
 - `pnpm typecheck` ✅
 - `pnpm plugins:test` ✅
 - `pnpm test` ✅
 - Merging the first three branches produces `41920b0` exactly.
-- Merging all seven branches produces the current `v3.1.0-integrated` tip.
-- Forgejo is updated with `v3.1.0-integrated`, `fix/prompt-window-signed-build`, `fix/scale-handle-and-keyboard`, `refactor/virtual-pet-context-menu`, and `chore/windows-setup-only`.
-- The Windows build target is now **NSIS setup only**; the portable target was removed from `electron-builder.yml` because only the full setup installer is needed.
+- Merging all six branches produces the current `v3.1.0-integrated` tip.
+- Forgejo is updated with `v3.1.0-integrated`, `fix/prompt-window-signed-build`, `fix/scale-handle-and-keyboard`, and `refactor/virtual-pet-context-menu`.
 - GitHub push and the signed Windows installer build are blocked pending credentials/access to the Windows build host (`DESKTOP-KS3VGHU`).