feat(journals): implement auto-save toggle and visual status

- Added 'auto_save' preference to journals store
- Added toggle and status indicators (Check/X/Loader) to JournalEntry_Header
- Implemented auto-save logic with debounce in Journal Entry view

src/routes/journals/JournalEntry_Header.svelte

@@ -8,7 +8,8 @@
         Save, Eye, Pencil, Tags, Shapes, 
         Siren, MessageSquareWarning, Skull, 
         Fingerprint, LockKeyhole, LockKeyholeOpen, Menu,
-        Globe, BookHeart, BriefcaseBusiness
+        Globe, BookHeart, BriefcaseBusiness,
+        CircleCheck, CircleX, Loader2, RefreshCw
     } from '@lucide/svelte';
     import { ae_util } from '$lib/ae_utils/ae_utils';
     import { ae_loc } from '$lib/stores/ae_stores';
@@ -28,6 +29,7 @@
         onChangeJournal: () => void;
         onAppend?: () => void;
         onPrepend?: () => void;
+        save_status?: 'saved' | 'unsaved' | 'saving';
         log_lvl?: number;
     }
 
@@ -43,6 +45,7 @@
         onChangeJournal,
         onAppend,
         onPrepend,
+        save_status = 'saved',
         log_lvl = 0 
     }: Props = $props();
 
@@ -96,6 +99,34 @@ p-2 md:p-3 rounded-lg shadow-md
             {/if}
         </button>
 
+        <!-- Auto Save Toggle & Status -->
+        {#if $journals_loc.entry.edit_kv[entry.journal_entry_id] === 'current'}
+            <div class="flex items-center gap-1 border-r border-surface-500/20 pr-2 mr-1">
+                <button
+                    type="button"
+                    class="btn btn-icon btn-icon-sm transition-all"
+                    class:text-primary-500={$journals_loc.entry.auto_save}
+                    class:opacity-50={!$journals_loc.entry.auto_save}
+                    onclick={() => $journals_loc.entry.auto_save = !$journals_loc.entry.auto_save}
+                    title="Toggle Auto Save"
+                >
+                    <RefreshCw size="1.1em" class={$journals_loc.entry.auto_save ? '' : ''} />
+                </button>
+                
+                {#if $journals_loc.entry.auto_save}
+                    <div class="flex items-center" title="Auto Save Status: {save_status}">
+                        {#if save_status === 'saving'}
+                            <Loader2 size="1.1em" class="animate-spin text-primary-500" />
+                        {:else if save_status === 'saved'}
+                            <CircleCheck size="1.1em" class="text-success-500" />
+                        {:else}
+                            <CircleX size="1.1em" class="text-surface-400" />
+                        {/if}
+                    </div>
+                {/if}
+            </div>
+        {/if}
+
         <h2 class="journal_entry__name text-base md:text-lg font-bold truncate max-w-[200px] md:max-w-md">
             {#if $journals_loc.entry.edit_kv[entry.journal_entry_id] == 'current'}
                 <input