Remove unused components and models for improved maintainability

- Deleted redundant components (`AddActionButton`, `AlertBox`, `AlertStack`, `BackButton`, `CancelButton`, and `CollapsableArea`) and related files.
- Removed unused models (`Book`, `BookSerie`, `BookTables`, `Character`, and `Chapter`) to reduce codebase clutter.
- Updated project structure and references to reflect these removals.

components/book/settings/BookSettingSidebar.tsx

@@ -1,26 +1,12 @@
 'use client'
-// Removed Next.js Link import for Electron
-import {FontAwesomeIcon} from "@fortawesome/react-fontawesome";
-import {
-    faBook,
-    faDownload,
-    faGlobe,
-    faHatWizard,
-    faListAlt,
-    faMapMarkedAlt,
-    faPencilAlt,
-    faUser,
-    faWandMagicSparkles
-} from "@fortawesome/free-solid-svg-icons";
-import {Dispatch, SetStateAction, useContext} from "react";
-import {IconDefinition} from "@fortawesome/fontawesome-svg-core";
-import {useTranslations} from "next-intl";
-import OfflineContext, {OfflineContextType} from "@/context/OfflineContext";
+import React, {Dispatch, SetStateAction} from "react";
+import {Book, Download, Globe, List, LucideIcon, Map, Pencil, User, Wand2} from 'lucide-react';
+import {useTranslations} from '@/lib/i18n';
 
 interface BookSettingOption {
     id: string;
     name: string;
-    icon: IconDefinition;
+    icon: LucideIcon;
 }
 
 export default function BookSettingSidebar(
@@ -32,92 +18,44 @@ export default function BookSettingSidebar(
         setSelectedSetting: Dispatch<SetStateAction<string>>
     }) {
     const t = useTranslations();
-    const {isCurrentlyOffline} = useContext<OfflineContextType>(OfflineContext);
 
     const settings: BookSettingOption[] = [
-        {
-            id: 'basic-information',
-            name: 'bookSetting.basicInformation',
-            icon: faPencilAlt
-        },
-        {
-            id: 'guide-line',
-            name: 'bookSetting.guideLine',
-            icon: faListAlt
-        },
-        {
-            id: 'story',
-            name: 'bookSetting.story',
-            icon: faBook
-        },
-        {
-            id: 'world',
-            name: 'bookSetting.world',
-            icon: faGlobe
-        },
-        {
-            id: 'locations',
-            name: 'bookSetting.locations',
-            icon: faMapMarkedAlt
-        },
-        {
-            id: 'characters',
-            name: 'bookSetting.characters',
-            icon: faUser
-        },
-        {
-            id: 'spells',
-            name: 'bookSetting.spells',
-            icon: faHatWizard
-        },
-        {
-            id: 'quillsense',
-            name: 'bookSetting.quillsense',
-            icon: faWandMagicSparkles
-        },
-        {
-            id: 'export',
-            name: 'bookSetting.export',
-            icon: faDownload
-        },
-        // {
-        //     id: 'objects',
-        //     name: t('bookSetting.objects'),
-        //     icon: faLocationArrow
-        // },
-        // {
-        //     id: 'goals',
-        //     name: t('bookSetting.goals'),
-        //     icon: faCogs
-        // },
-    ]
-
-    // Filter out QuillSense when offline (requires server connection)
-    const availableSettings: BookSettingOption[] = isCurrentlyOffline()
-        ? settings.filter((s: BookSettingOption) => s.id !== 'quillsense')
-        : settings;
+        {id: 'basic-information', name: 'bookSetting.basicInformation', icon: Pencil},
+        {id: 'guide-line', name: 'bookSetting.guideLine', icon: List},
+        {id: 'story', name: 'bookSetting.story', icon: Book},
+        {id: 'world', name: 'bookSetting.world', icon: Globe},
+        {id: 'locations', name: 'bookSetting.locations', icon: Map},
+        {id: 'characters', name: 'bookSetting.characters', icon: User},
+        {id: 'spells', name: 'bookSetting.spells', icon: Wand2},
+        {id: 'quillsense', name: 'bookSetting.quillsense', icon: Wand2},
+        {id: 'export', name: 'bookSetting.export', icon: Download},
+    ];
 
     return (
-        <div className="py-6 px-3">
-            <nav className="space-y-1">
-                {
-                    availableSettings.map((setting: BookSettingOption) => (
+        <div className="py-4 px-2">
+            <nav className="space-y-0.5">
+                {settings.map((setting: BookSettingOption) => {
+                    const Icon: LucideIcon = setting.icon;
+                    const isActive: boolean = selectedSetting === setting.id;
+                    return (
                         <button
                             key={setting.id}
                             onClick={(): void => setSelectedSetting(setting.id)}
-                            type="button"
-                            className={`flex items-center text-base rounded-xl transition-all duration-200 w-full ${
-                                selectedSetting === setting.id
-                                    ? 'bg-primary/20 text-text-primary border-l-4 border-primary font-semibold shadow-md scale-105'
-                                    : 'text-text-secondary hover:bg-secondary/50 hover:text-text-primary hover:scale-102'
-                            } p-3 mb-1`}>
-                            <FontAwesomeIcon icon={setting.icon}
-                                             className={`mr-3 ${selectedSetting === setting.id ? 'text-primary w-5 h-5' : 'text-text-secondary w-5 h-5'}`}/>
+                            className={`flex items-center w-full text-sm rounded-lg transition-colors duration-150 px-3 py-2 ${
+                                isActive
+                                    ? 'bg-secondary text-text-primary font-medium'
+                                    : 'text-text-secondary hover:bg-secondary/50 hover:text-text-primary'
+                            }`}
+                        >
+                            <Icon
+                                className={`mr-2.5 w-4 h-4 flex-shrink-0 ${isActive ? 'text-primary' : 'text-muted'}`}
+                                strokeWidth={1.75}
+                            />
                             {t(setting.name)}
                         </button>
-                    ))
-                }
+                    );
+                })}
             </nav>
         </div>
-    )
+    );
 }