Add offline mode logic for book, story, and world operations

- Integrate `OfflineContext` into book, story settings, and related components.
- Add conditional logic to toggle between server API requests and offline IPC handlers (`db:book:delete`, `db:book:story:get`, `db:location:all`, etc.).
- Refactor and update IPC handlers to accept structured data arguments for improved consistency (`data: object`).
- Ensure stricter typings in IPC handlers and frontend functions.
- Improve error handling and user feedback in both online and offline modes.

electron/ipc/character.ipc.ts

@@ -15,17 +15,23 @@ interface AddAttributeData {
 }
 
 // GET /character/list - Get character list
-ipcMain.handle('db:character:list', createHandler<string, CharacterProps[]>(
-        function(userId: string, bookId: string, lang: 'fr' | 'en'): CharacterProps[] {
-            return Character.getCharacterList(userId, bookId, lang);
+interface GetCharacterListData {
+    bookid: string;
+}
+ipcMain.handle('db:character:list', createHandler<GetCharacterListData, CharacterProps[]>(
+        function(userId: string, data: GetCharacterListData, lang: 'fr' | 'en'): CharacterProps[] {
+            return Character.getCharacterList(userId, data.bookid, lang);
         }
     )
 );
 
 // GET /character/attribute - Get character attributes
-ipcMain.handle('db:character:attributes', createHandler<string, CharacterAttribute[]>(
-        function(userId: string, characterId: string, lang: 'fr' | 'en'): CharacterAttribute[] {
-            return Character.getAttributes(characterId, userId, lang);
+interface GetCharacterAttributesData {
+    characterId: string;
+}
+ipcMain.handle('db:character:attributes', createHandler<GetCharacterAttributesData, CharacterAttribute[]>(
+        function(userId: string, data: GetCharacterAttributesData, lang: 'fr' | 'en'): CharacterAttribute[] {
+            return Character.getAttributes(data.characterId, userId, lang);
         }
     )
 );
@@ -47,17 +53,23 @@ ipcMain.handle('db:character:attribute:add', createHandler<AddAttributeData, str
 );
 
 // DELETE /character/attribute/delete - Delete character attribute
-ipcMain.handle('db:character:attribute:delete', createHandler<string, boolean>(
-        function(userId: string, attributeId: string, lang: 'fr' | 'en'): boolean {
-            return Character.deleteAttribute(userId, attributeId, lang);
+interface DeleteAttributeData {
+    attributeId: string;
+}
+ipcMain.handle('db:character:attribute:delete', createHandler<DeleteAttributeData, boolean>(
+        function(userId: string, data: DeleteAttributeData, lang: 'fr' | 'en'): boolean {
+            return Character.deleteAttribute(userId, data.attributeId, lang);
         }
     )
 );
 
 // POST /character/update - Update character
-ipcMain.handle('db:character:update', createHandler<CharacterPropsPost, boolean>(
-        function(userId: string, character: CharacterPropsPost, lang: 'fr' | 'en'): boolean {
-            return Character.updateCharacter(userId, character, lang);
+interface UpdateCharacterData {
+    character: CharacterPropsPost;
+}
+ipcMain.handle('db:character:update', createHandler<UpdateCharacterData, boolean>(
+        function(userId: string, data: UpdateCharacterData, lang: 'fr' | 'en'): boolean {
+            return Character.updateCharacter(userId, data.character, lang);
         }
     )
 );