Add offline mode logic for chapter operations and refactor IPC handlers

- Integrate `OfflineContext` into `TextEditor` and `ScribeChapterComponent` to handle offline scenarios for chapter CRUD operations.
- Add conditional logic to switch between server API requests and offline IPC handlers (`db:chapter:add`, `db:chapter:remove`, `db:chapter:content:save`, `db:chapter:update`).
- Refactor and rename IPC handlers (`db:chapter:create` to `db:chapter:add`, `db:chapter:delete` to `db:chapter:remove`) for consistency.
- Update UI to disable certain actions when offline (e.g., GhostWriter button).

components/editor/TextEditor.tsx

@@ -30,6 +30,7 @@ import {IconDefinition} from "@fortawesome/fontawesome-svg-core";
 import UserEditorSettings, {EditorDisplaySettings} from "@/components/editor/UserEditorSetting";
 import {useTranslations} from "next-intl";
 import {LangContext, LangContextProps} from "@/context/LangContext";
+import OfflineContext, {OfflineContextType} from "@/context/OfflineContext";
 
 interface ToolbarButton {
     action: () => void;
@@ -136,6 +137,7 @@ export default function TextEditor() {
     const {chapter} = useContext(ChapterContext);
     const {errorMessage, successMessage} = useContext(AlertContext);
     const {session} = useContext(SessionContext);
+    const {isCurrentlyOffline} = useContext<OfflineContextType>(OfflineContext);
     
     const [mainTimer, setMainTimer] = useState<number>(0);
     const [showDraftCompanion, setShowDraftCompanion] = useState<boolean>(false);
@@ -282,13 +284,24 @@ export default function TextEditor() {
         const version: number = chapter.chapterContent.version || 0;
         
         try {
-            const response: boolean = await System.authPostToServer<boolean>(`chapter/content`, {
-                chapterId,
-                version,
-                content,
-                totalWordCount: editor.getText().length,
-                currentTime: mainTimer
-            }, session?.accessToken ?? '');
+            let response: boolean;
+            if (isCurrentlyOffline()){
+                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 ?? '');
+            }
             if (!response) {
                 errorMessage(t('editor.error.savedFailed'));
                 setIsSaving(false);
@@ -437,8 +450,7 @@ export default function TextEditor() {
                             onClick={button.action}
                             className={`group flex items-center px-3 py-2 rounded-lg transition-all duration-200 ${button.isActive ? 'bg-primary text-text-primary shadow-md shadow-primary/30 scale-105' : 'text-muted hover:text-text-primary hover:bg-secondary/50 hover:shadow-sm hover:scale-105'}`}
                         >
-                            <FontAwesomeIcon icon={button.icon}
-                                             className={'w-4 h-4 transition-transform duration-200 group-hover:scale-110'}/>
+                            <FontAwesomeIcon icon={button.icon} className={'w-4 h-4 transition-transform duration-200 group-hover:scale-110'}/>
                             {
                                 button.label &&
                                 <span className="ml-2 text-sm font-medium">
@@ -455,7 +467,7 @@ export default function TextEditor() {
                         onClick={handleShowUserSettings}
                         icon={faCog}
                     />
-                    {chapter?.chapterContent.version === 2 && (
+                    {chapter?.chapterContent.version === 2 && !isCurrentlyOffline() && (
                         <CollapsableButton
                             showCollapsable={showGhostWriter}
                             text={t("textEditor.ghostWriter")}