feat(v3-auth): modernize hosted file access with simplified bypass pattern

- Roll out platform-wide standard for unauthenticated binary access using '?key=[account_id]' query parameter.
- Update API helpers (get, post, patch) to recognize 'key' bypass and strip account context headers accordingly.
- Refactor IDAA Bulletin Board to restore inline image rendering and edit-mode previews.
- Modernize Events Launcher (Layout, Sync, Session View) to use V3 Action URLs with verified auth.
- Update HTML generators in 'ae_utils.ts' to support the new authenticated URL structure.
- Harden 'ae_comp__event_file_obj_tbl' CSV export and clipboard links with V3 standard patterns.

src/routes/journals/ae_comp__journal_entry_obj_file_li.svelte

@@ -36,6 +36,7 @@
 
     import Comp_hosted_files_upload from '$lib/ae_core/ae_comp__hosted_files_upload.svelte';
     import Element_manage_hosted_file_li_wrap from '$lib/elements/element_manage_hosted_file_li_all.svelte';
+    import AE_Comp_Hosted_Files_Download_Button from '$lib/ae_core/ae_comp__hosted_files_download_button.svelte';
 
     interface Props {
         log_lvl?: number;
@@ -158,18 +159,6 @@
 
         await update_journal_entry(updated_li);
     }
-
-    async function download_file(file: any) {
-        const file_id = file.hosted_file_id || file.id || file.hosted_file_id;
-        ae_promises[file_id] = api.download_hosted_file({
-            api_cfg: $ae_api,
-            hosted_file_id: file_id,
-            return_file: true,
-            filename: file.filename,
-            auto_download: true,
-            log_lvl: 0
-        });
-    }
 </script>
 
 <section class="ae_section journal_entry_files w-full space-y-4 my-2">
@@ -203,29 +192,20 @@
             {#each unified_file_li as file}
                 {@const file_id = file.hosted_file_id || file.id || file.hosted_file_id}
                 <div class="flex items-center justify-between p-3 rounded-xl bg-surface-50-950 border border-surface-500/10 group hover:border-primary-500 transition-all shadow-sm">
-                    <div class="flex items-center gap-3 overflow-hidden">
-                        <div class="text-primary-500 shrink-0">
-                            <span class="fas fa-{ae_util.file_extension_icon(file.extension)} fa-lg"></span>
-                        </div>
-                        <div class="flex flex-col overflow-hidden">
-                            <span class="text-sm font-bold truncate" title={file.filename}>{file.filename}</span>
-                            <span class="text-xs opacity-60 uppercase font-semibold">{file.extension} • {ae_util.format_bytes(file.size)}</span>
-                        </div>
+                    <div class="flex items-center gap-3 overflow-hidden grow">
+                        <AE_Comp_Hosted_Files_Download_Button
+                            hosted_file_id={file_id}
+                            hosted_file_obj={file}
+                            color="primary"
+                            variant="tonal"
+                            classes="w-full !justify-start !px-2"
+                            show_divider={true}
+                            max_filename={25}
+                            show_direct_download={$ae_loc.trusted_access && $ae_loc.edit_mode}
+                        />
                     </div>
 
-                    <div class="flex items-center gap-1">
-                        <button
-                            class="btn btn-sm variant-soft-primary"
-                            onclick={() => download_file(file)}
-                            title="Download file"
-                        >
-                            {#if ae_promises[file_id]}
-                                <Loader2 size="1.1em" class="animate-spin" />
-                            {:else}
-                                <Download size="1.1em" />
-                            {/if}
-                        </button>
-
+                    <div class="flex items-center gap-1 ml-2">
                         {#if $ae_loc.edit_mode}
                             <button
                                 class="btn btn-sm variant-soft-error"