Implement unified frontend type system and migrate core modules

- Created src/lib/types/ae_types.ts to serve as the central repository for Aether object interfaces.
- Standardized interfaces to include the triple-ID pattern (id, [type]_id, [type]_id_random) for Dexie and V3 API compatibility.
- Migrated Account and JournalEntry modules to use ae_Account and ae_JournalEntry types.
- Added explicit Promise return types to all core data loading, creation, and update functions in migrated modules.

src/lib/ae_journals/ae_journals__journal_entry.ts

@@ -5,6 +5,7 @@ import { api } from '$lib/api/api';
 
 import { db_save_ae_obj_li__ae_obj } from '$lib/ae_core/core__idb_dexie';
 import { db_journals } from '$lib/ae_journals/db_journals';
+import type { ae_JournalEntry } from '$lib/types/ae_types';
 
 const ae_promises: key_val = {};
 
@@ -19,7 +20,7 @@ export async function load_ae_obj_id__journal_entry({
     journal_entry_id: string;
     try_cache?: boolean;
     log_lvl?: number;
-}) {
+}): Promise<ae_JournalEntry | null> {
     if (log_lvl) {
         console.log(`*** load_ae_obj_id__journal_entry() *** journal_entry_id=${journal_entry_id}`);
     }
@@ -95,7 +96,7 @@ export async function load_ae_obj_li__journal_entry({
     params?: key_val;
     try_cache?: boolean;
     log_lvl?: number;
-}) {
+}): Promise<ae_JournalEntry[]> {
     if (log_lvl) {
         console.log(
             `*** load_ae_obj_li__journal_entry() *** for_obj_type=${for_obj_type} for_obj_id=${for_obj_id}`
@@ -194,7 +195,7 @@ export async function create_ae_obj__journal_entry({
     params?: key_val;
     try_cache?: boolean;
     log_lvl?: number;
-}) {
+}): Promise<ae_JournalEntry | null> {
     if (log_lvl) {
         console.log(`*** create_ae_obj__journal_entry() *** journal_id=${journal_id}`);
     }
@@ -496,7 +497,7 @@ export async function update_ae_obj__journal_entry({
     params?: key_val;
     try_cache?: boolean;
     log_lvl?: number;
-}) {
+}): Promise<ae_JournalEntry | null> {
     if (log_lvl) {
         console.log(
             `*** update_ae_obj__journal_entry() *** journal_entry_id=${journal_entry_id}`,