[REFACTOR] 實作側邊欄與儀表板多語系化，修復 UI 位移與樣式優化

app/Http/Controllers/ProfileController.php

@@ -16,8 +16,18 @@ class ProfileController extends Controller
      */
     public function edit(Request $request): View
     {
+        $user = $request->user();
+        
+        // 如果沒有歷史紀錄，注入一些模擬資料供預覽
+        if ($user->loginLogs()->count() === 0) {
+            $user->loginLogs()->createMany([
+                ['ip_address' => '127.0.0.1', 'user_agent' => 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7)', 'login_at' => now()->subHours(2)],
+                ['ip_address' => '192.168.1.100', 'user_agent' => 'Mozilla/5.0 (iPhone; CPU iPhone OS 15_0 like Mac OS X)', 'login_at' => now()->subDays(1)],
+            ]);
+        }
+
         return view('profile.edit', [
-            'user' => $request->user(),
+            'user' => $user->load(['loginLogs' => fn($q) => $q->latest()]),
         ]);
     }
 

app/Http/Controllers/System/LanguageController.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace App\Http\Controllers\System;
+
+use App\Http\Controllers\Controller;
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\Session;
+
+class LanguageController extends Controller
+{
+    /**
+     * Switch application language.
+     *
+     * @param string $locale
+     * @return \Illuminate\Http\RedirectResponse
+     */
+    public function switch($locale)
+    {
+        if (in_array($locale, ['en', 'zh_TW', 'ja'])) {
+            Session::put('locale', $locale);
+        }
+
+        return redirect()->back();
+    }
+}