Fix file sharing load speed and move error; misc updates

- Remove recursive directory size calculations (single Seafile API call per list)
- Remove 'Used in this location' usage display
- Fix move using v2 per-type endpoints instead of broken batch endpoint
- Send entry type from frontend for correct move routing

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

supabase/migrations/20260408025500_normalize_submission_versions.sql

@@ -0,0 +1,24 @@
+with affected_tasks as (
+  select s.task_id
+  from public.submissions s
+  group by s.task_id
+  having min(s.version_number) filter (where s.type <> 'amendment') = 1
+     and count(*) filter (where s.type <> 'amendment' and s.version_number = 0) = 0
+)
+update public.submissions s
+set version_number = s.version_number - 1
+from affected_tasks a
+where s.task_id = a.task_id;
+
+with corrected_versions as (
+  select
+    s.task_id,
+    coalesce(max(s.version_number) filter (where s.type <> 'amendment'), 0) as corrected_current_version
+  from public.submissions s
+  group by s.task_id
+)
+update public.tasks t
+set current_version = cv.corrected_current_version
+from corrected_versions cv
+where t.id = cv.task_id
+  and t.current_version is distinct from cv.corrected_current_version;