feat(launcher): implement device heartbeat and background sync engine

- Hardened 'find_object_id' in Dexie to support 'event_' prefixed IDs.
- Implemented singleton 'LauncherBackgroundSync' in root launcher layout.
- Added V3-compliant heartbeat and room refresh cycles.
- Fixed redundant component imports and Skeleton UI prop errors.
- Added 'inc_file_li' support to event API loader.

src/lib/ae_core/core__idb_dexie.ts

@@ -13,7 +13,14 @@ function find_object_id(
     table_name: string,
     log_lvl: number
 ): string | number | undefined {
-    const potential_keys = ['id', 'id_random', `${table_name}_id`, `${table_name}_id_random`];
+    const potential_keys = [
+        'id', 
+        'id_random', 
+        `${table_name}_id`, 
+        `${table_name}_id_random`,
+        `event_${table_name}_id`,
+        `event_${table_name}_id_random`
+    ];
 
     for (const key of potential_keys) {
         if (obj[key]) {
@@ -27,10 +34,12 @@ function find_object_id(
         }
     }
 
-    console.error(
-        `Object is missing a valid ID for table "${table_name}". It will be skipped.`,
-        obj
-    );
+    if (log_lvl) {
+        console.error(
+            `Object is missing a valid ID for table "${table_name}". It will be skipped. Checked keys: ${potential_keys.join(', ')}`,
+            obj
+        );
+    }
     return undefined;
 }