chore: update reset-demo branch cleanup

Document demo reset cleanup so the reset flow also closes out extra non-main branches used during demo prep.

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: mattfromcursor

.cursor/commands/reset-demo.md

@@ -5,7 +5,7 @@ description: Restore the eShop demo workspace to the demo-baseline git tag. Use
 
 # reset-demo
 
-**Destructive:** restores the repository to the `demo-baseline` tag.
+**Destructive:** restores the repository to the `demo-baseline` tag and closes out extra non-`main` branches used during demo prep.
 
 **Git root:** repository root (`eshop/` — where `eShop.Web.slnf` lives)
 
@@ -15,8 +15,12 @@ description: Restore the eShop demo workspace to the demo-baseline git tag. Use
 2. `git status` — warn about unpushed commits and uncommitted work.
 3. `git reset --hard demo-baseline`
 4. `git clean -fd` — do **not** delete local secrets (`.env`, `.env.local`, user-specific Aspire settings) if present.
-5. `dotnet restore eShop.Web.slnf && dotnet build eShop.Web.slnf`
-6. Tell the user to run AppHost if needed: `dotnet run --project src/eShop.AppHost/eShop.AppHost.csproj` (Docker required).
+5. Close out non-`main` branches that are not needed for the demo script:
+   - delete local branches other than `main`
+   - delete matching `origin/*` branches in this fork when they are no longer needed for the demo reset
+   - never touch `upstream/*`
+6. `dotnet restore eShop.Web.slnf && dotnet build eShop.Web.slnf`
+7. Tell the user to run AppHost if needed: `dotnet run --project src/eShop.AppHost/eShop.AppHost.csproj` (Docker required).
 
 ## If tag missing