refactor: ensure robust event file retrieval from Dexie cache

- Reverted 'element_manage_event_file_li_direct.svelte' to use 'for_type' and 'for_id' for cache-aware filtering.
- Enhanced 'element_manage_event_file_li_all.svelte' with a combined filter for specific and generic IDs.
- Verified that ID synchronization in 'process_ae_obj__event_file_props' supports these retrieval patterns.

src/lib/elements/element_manage_event_file_li_all.svelte

@@ -48,6 +48,15 @@
             let results = await db_events.file
                 .where(dq__where_val)
                 .equals(dq__where_eq_val)
+                .or('for_id')
+                .equals(dq__where_eq_val)
+                .filter((file) => {
+                    // If using for_id, we should also verify for_type to avoid accidental cross-links
+                    if (file.for_id === dq__where_eq_val) {
+                        return file.for_type === link_to_type;
+                    }
+                    return true;
+                })
                 .reverse()
                 .sortBy('created_on');
             // .toArray()