Migrate Content and Storage modules to unified type system

- Added ae_HostedFile, ae_HostedFileLink, ae_DataStore, ae_Post, ae_PostComment, ae_Page, ae_Archive, and ae_ArchiveContent to ae_types.ts.
- Replaced local interfaces in core__hosted_files.ts and core__data_store.ts with unified imports.
- Replaced local interfaces in ae_archives/*.ts with unified imports.
- Standardized Promise return types for all core data loading, creation, search, and update functions across migrated modules.
- Synchronized storage and archival modules with Backend V3 field naming and Triple-ID patterns.

src/lib/ae_core/core__data_store.ts

@@ -1,26 +1,7 @@
 import { browser } from '$app/environment';
 import type { key_val } from '$lib/stores/ae_stores';
 import { api } from '$lib/api/api';
-
-export interface Data_Store {
-    id: string;
-    account_id: string;
-    code: string;
-    name: string;
-    type: string;
-    for_type?: string | null;
-    for_id?: string | null;
-    access_read?: string | null;
-    access_write?: string | null;
-    access_delete?: string | null;
-    html?: string | null;
-    json?: key_val | null;
-    md?: string | null;
-    text?: string | null;
-    updated_on?: string | null;
-    chk_account_id?: string;
-    loaded_on?: string;
-}
+import type { ae_DataStore } from '$lib/types/ae_types';
 
 /**
  * Fetches a data_store object by its unique code.

src/lib/ae_core/core__hosted_files.ts

@@ -2,6 +2,7 @@ import type { key_val } from '$lib/stores/ae_stores';
 import { api } from '$lib/api/api';
 
 import { db_core } from '$lib/ae_core/db_core';
+import type { ae_HostedFile } from '$lib/types/ae_types';
 
 const ae_promises: key_val = {};
 
@@ -16,7 +17,7 @@ export async function load_ae_obj_id__hosted_file({
     hosted_file_id: string;
     try_cache?: boolean;
     log_lvl?: number;
-}) {
+}): Promise<ae_HostedFile | null> {
     if (log_lvl) {
         console.log(`*** load_ae_obj_id__hosted_file() *** hosted_file_id=${hosted_file_id}`);
     }
@@ -78,7 +79,7 @@ export async function load_ae_obj_li__hosted_file({
     params?: key_val;
     try_cache?: boolean;
     log_lvl?: number;
-}) {
+}): Promise<ae_HostedFile[]> {
     if (log_lvl) {
         console.log(
             `*** load_ae_obj_li__hosted_file() *** for_obj_type=${for_obj_type} for_obj_id=${for_obj_id}`