feat(journals): implement Quick Add and unified Append/Prepend shared component

- Created AeCompJournalEntryQuickAdd for high-velocity note creation
- Extracted robust append/prepend logic from List View into AeCompModalJournalEntryAppend
- Unified List and Detail views to use the shared modal for content manipulation
- Added explicit Append/Prepend actions to Journal Entry settings menu
- Updated TODO.md and Journals module documentation

src/routes/journals/JournalEntry_Header.svelte

@@ -26,6 +26,8 @@
         onDecrypt: () => void;
         onDecryptHistory: () => void;
         onChangeJournal: () => void;
+        onAppend?: () => void;
+        onPrepend?: () => void;
         log_lvl?: number;
     }
 
@@ -39,6 +41,8 @@
         onDecrypt,
         onDecryptHistory,
         onChangeJournal,
+        onAppend,
+        onPrepend,
         log_lvl = 0 
     }: Props = $props();
 
@@ -220,6 +224,8 @@ p-2 md:p-3 rounded-lg shadow-md
                                 {onSave}
                                 {onDecryptHistory}
                                 {onChangeJournal}
+                                {onAppend}
+                                {onPrepend}
                                 {log_lvl}
                             />
                         </div>