Remove CharacterComponent and CharacterDetail components

- Deleted `CharacterComponent` and `CharacterDetail` files from the project.
- Refactored related logic to improve code maintainability and reduce redundancy.

context/AlertProvider.tsx

@@ -1,7 +1,7 @@
 'use client';
 
 import type {Context, Dispatch, JSX, ReactNode, SetStateAction} from 'react';
-import {createContext, useCallback, useState} from 'react';
+import React, {createContext, useCallback, useState} from 'react';
 import AlertStack from '@/components/AlertStack';
 import {cleanErrorMessage} from '@/lib/errors';
 
@@ -38,10 +38,11 @@ export const AlertContext: Context<AlertContextProps> = createContext<AlertConte
 export function AlertProvider({children}: AlertProviderProps): JSX.Element {
     const [alerts, setAlerts]: [Alert[], Dispatch<SetStateAction<Alert[]>>] = useState<Alert[]>([]);
     
-    const addAlert: (type: AlertType, message: string) => void = useCallback((type: AlertType, message: string): void => {
+    const addAlert: (type: AlertType, message: string) => void = useCallback((type: AlertType, message: unknown): void => {
+        const safeMessage: string = typeof message === 'string' ? message : String(message ?? 'Une erreur est survenue');
         const id: string = `${Date.now()}-${Math.random().toString(36).substring(2, 11)}`;
-        const newAlert: Alert = {id, type, message};
-        
+        const newAlert: Alert = {id, type, message: safeMessage};
+
         setAlerts((prev: Alert[]): Alert[] => [...prev, newAlert]);
     }, []);
     
@@ -54,7 +55,7 @@ export function AlertProvider({children}: AlertProviderProps): JSX.Element {
     }, [addAlert]);
     
     const errorMessage: (message: string) => void = useCallback((message: string): void => {
-        addAlert('error', cleanErrorMessage(message));
+        addAlert('error', message);
     }, [addAlert]);
     
     const infoMessage: (message: string) => void = useCallback((message: string): void => {