fix(journals): resolve decryption UI update and background sync issues

- Cleared 'content_encrypted' from local state upon successful decryption to update UI.
- Modified background sync effect to preserve decrypted content during active sessions.
- Enhanced decryption logging for better diagnostics.

src/lib/ae_journals/ae_journals_decryption.ts

@@ -81,7 +81,7 @@ export async function decrypt_journal_entry(
             }
         }
 
-        console.log('decrypt_journal_entry: SUCCESS');
+        console.log(`decrypt_journal_entry: SUCCESS. Content length: ${decrypted_text.length}. Preview: ${decrypted_text.substring(0, 20)}...`);
         return { 
             success: true, 
             content: decrypted_text,