Fix selection state: derive from DOM (single source of truth), clear browser-restored form state on load

prefect.yaml

@@ -102,3 +102,16 @@ deployments:
     name: photo-pool
     work_queue_name: null
     job_variables: {}
+
+- name: staging
+  version: null
+  tags: [photo-pipeline]
+  description: "Materialize review decisions: move approved/rejected files to staging dirs"
+  schedule: null
+  flow_name: null
+  entrypoint: process_staging.py:process_staging
+  parameters: {}
+  work_pool:
+    name: photo-pool
+    work_queue_name: null
+    job_variables: {}