Refactor character, chapter, and story components to support offline mode

- Add `OfflineContext` and `BookContext` to components for offline state management.
- Introduce conditional logic to toggle between server API requests and offline IPC handlers for CRUD operations.
- Refine `TextEditor`, `DraftCompanion`, and other components to disable actions or features unavailable in offline mode.
- Improve error handling and user feedback in both online and offline scenarios.

components/editor/TextEditor.tsx

@@ -22,6 +22,7 @@ import {ChapterContext} from '@/context/ChapterContext';
 import System from '@/lib/models/System';
 import {AlertContext} from '@/context/AlertContext';
 import {SessionContext} from "@/context/SessionContext";
+import {BookContext} from '@/context/BookContext';
 import DraftCompanion from "@/components/editor/DraftCompanion";
 import GhostWriter from "@/components/ghostwriter/GhostWriter";
 import SubmitButtonWLoading from "@/components/form/SubmitButtonWLoading";
@@ -135,6 +136,7 @@ export default function TextEditor() {
     const {lang} = useContext<LangContextProps>(LangContext)
     const {editor} = useContext(EditorContext);
     const {chapter} = useContext(ChapterContext);
+    const {book} = useContext(BookContext);
     const {errorMessage, successMessage} = useContext(AlertContext);
     const {session} = useContext(SessionContext);
     const {isCurrentlyOffline} = useContext<OfflineContextType>(OfflineContext);
@@ -294,13 +296,23 @@ export default function TextEditor() {
                     currentTime: mainTimer
                 })
             } else {
-                response = await System.authPostToServer<boolean>(`chapter/content`, {
-                    chapterId,
-                    version,
-                    content,
-                    totalWordCount: editor.getText().length,
-                    currentTime: mainTimer
-                }, session?.accessToken, lang);
+                if (book?.localBook) {
+                    response = await window.electron.invoke<boolean>('db:chapter:content:save',{
+                        chapterId,
+                        version,
+                        content,
+                        totalWordCount: editor.getText().length,
+                        currentTime: mainTimer
+                    })
+                } else {
+                    response = await System.authPostToServer<boolean>(`chapter/content`, {
+                        chapterId,
+                        version,
+                        content,
+                        totalWordCount: editor.getText().length,
+                        currentTime: mainTimer
+                    }, session?.accessToken, lang);
+                }
             }
             if (!response) {
                 errorMessage(t('editor.error.savedFailed'));
@@ -467,7 +479,7 @@ export default function TextEditor() {
                         onClick={handleShowUserSettings}
                         icon={faCog}
                     />
-                    {chapter?.chapterContent.version === 2 && !isCurrentlyOffline() && (
+                    {chapter?.chapterContent.version === 2 && !isCurrentlyOffline() && !book?.localBook && (
                         <CollapsableButton
                             showCollapsable={showGhostWriter}
                             text={t("textEditor.ghostWriter")}