fix(idaa): harden data sync against padStart crashes and fix Archive Content sort

- Hardened object processors in Archives and Posts modules to safely handle null 'sort' values, preventing runtime TypeErrors during data synchronization.
- Fixed inconsistent sorting in Archive Content list by correctly implementing descending order (sort then reverse) and adding a configuration loading guard to the liveQuery.
- Standardized safe data processing patterns in SVELTE_DEXIE_GUIDE.md.
- Performed minor cleanup and visibility logic hardening in Recovery Meetings module.

src/lib/ae_archives/ae_archives__archive.ts

@@ -472,11 +472,12 @@ export async function process_ae_obj__archive_props({
         obj_type: 'archive',
         log_lvl,
         specific_processor: (obj) => {
+            const sort_val = (obj.sort ?? 0).toString().padStart(3, '0');
             obj.tmp_sort_1 = `${obj.group ?? ''}_${obj.priority ? '1' : '0'}_${
-                obj.sort?.toString().padStart(3, '0') ?? ''
+                sort_val
             }_${obj.updated_on ?? obj.created_on}`;
             obj.tmp_sort_2 = `${obj.group ?? ''}_${obj.priority ? '1' : '0'}_${
-                obj.sort?.toString().padStart(3, '0') ?? ''
+                sort_val
             }_${obj.updated_on}_${obj.created_on}`;
 
             return obj;

src/lib/ae_archives/ae_archives__archive_content.ts

@@ -384,15 +384,16 @@ export async function process_ae_obj__archive_content_props({
         obj_type: 'archive_content',
         log_lvl,
         specific_processor: (obj) => {
+            const sort_val = (obj.sort ?? 0).toString().padStart(3, '0');
             obj.tmp_sort_1 = `${obj.group ?? ''}_${obj.priority ? '1' : '0'}_${
-                obj.sort?.toString().padStart(3, '0') ?? ''
+                sort_val
             }_${obj.original_datetime ?? ''}`;
             obj.tmp_sort_2 = `${obj.group ?? ''}_${obj.original_datetime ?? ''}_${
                 obj.priority ? '1' : '0'
-            }_${obj.sort?.toString().padStart(3, '0') ?? ''}`;
+            }_${sort_val}`;
             obj.tmp_sort_3 = `${obj.original_datetime ?? ''}_${obj.group ?? ''}_${
                 obj.priority ? '1' : '0'
-            }_${obj.sort?.toString().padStart(3, '0') ?? ''}`;
+            }_${sort_val}`;
 
             obj.hash_sha256 = obj.hosted_file_hash_sha256;