refactor: implement frontend safety net for missing event file foreign keys

- Updated '_refresh_file_li_background' to manually inject 'for_id', 'for_type', and specific object IDs if they are missing from the API response.
- This ensures robust indexing and retrieval from Dexie even when the V3 backend fails to populate linking fields.
- Verified that these 'fixed' objects are correctly processed and saved to the local cache.

src/lib/ae_events/ae_events__event_file.ts

@@ -193,8 +193,22 @@ async function _refresh_file_li_background({
             log_lvl
         });
         if (result_li) {
+            // SAFETY NET: If API returns null IDs, inject the ones we used for the query
+            const fixed_li = result_li.map((obj: any) => {
+                const fixed_obj = { ...obj };
+                if (!fixed_obj.for_type) fixed_obj.for_type = for_obj_type;
+                if (!fixed_obj.for_id) fixed_obj.for_id = for_obj_id;
+
+                // Also ensure the specific ID field is populated
+                const specific_id_key = `${for_obj_type}_id`;
+                if (!fixed_obj[specific_id_key])
+                    fixed_obj[specific_id_key] = for_obj_id;
+
+                return fixed_obj;
+            });
+
             const processed = await process_ae_obj__event_file_props({
-                obj_li: result_li,
+                obj_li: fixed_li,
                 log_lvl
             });
             if (try_cache) {