Build teaser-2026 into prod

.github/workflows/build.yml

@@ -2,6 +2,12 @@ name: build
 
 on:
   workflow_call:
+    inputs:
+      ref:
+        description: Branch or tag to checkout
+        required: false
+        default: teaser-2026
+        type: string
     secrets:
       USER_AUTH:
         required: true
@@ -17,6 +23,8 @@ jobs:
 
       - name: Checkout code
         uses: actions/checkout@v4
+        with:
+          ref: ${{ inputs.ref }}
 
       - name: Setup Bun
         uses: oven-sh/setup-bun@v2