docs: improve Linux installation guide with CLI one-liner and copy feature

src/app/(public)/HomeClient.tsx

@@ -99,22 +99,37 @@ function OsGuideContent({ title, steps }: { title: string, steps: string[] }) {
                 {title}
             </h4>
             <ul className="space-y-4">
-                {steps.map((step, idx) => (
-                    <li key={idx} className="flex gap-4">
-                        <span className="flex-shrink-0 w-6 h-6 rounded-full bg-brand-50 dark:bg-brand-500/10 text-brand-600 dark:text-brand-400 flex items-center justify-center text-xs font-bold border border-brand-100 dark:border-brand-500/20">
-                            {idx + 1}
-                        </span>
-                        <p className="text-sm text-gray-600 dark:text-gray-400 leading-relaxed font-medium">
-                            {step}
-                        </p>
-                    </li>
-                ))}
+                {steps.map((step, idx) => {
+                    const isCommand = step.includes('curl') || step.includes('bash') || step.includes('sudo');
+                    return (
+                        <li key={idx} className="flex gap-4">
+                            <span className="flex-shrink-0 w-6 h-6 rounded-full bg-brand-50 dark:bg-brand-500/10 text-brand-600 dark:text-brand-400 flex items-center justify-center text-xs font-bold border border-brand-100 dark:border-brand-500/20">
+                                {idx + 1}
+                            </span>
+                            <div className="flex-1">
+                                <p className={`text-sm text-gray-600 dark:text-gray-400 leading-relaxed ${isCommand ? 'font-mono bg-gray-100 dark:bg-gray-900 px-3 py-1.5 rounded-lg border border-gray-200 dark:border-gray-700 break-all' : 'font-medium'}`}>
+                                    {step}
+                                </p>
+                            </div>
+                        </li>
+                    );
+                })}
             </ul>
         </div>
     );
 }
 
 function CaCard({ cert, isRoot, t, selectedOs, setSelectedOs }: { cert: CaCertificate, isRoot: boolean, t: any, selectedOs: string, setSelectedOs: (os: any) => void }) {
+    const [copied, setCopied] = useState(false);
+
+    const copyLinuxCli = () => {
+        if (!cert.linux_cdn_url) return;
+        const command = `curl -sL ${cert.linux_cdn_url} | sudo bash`;
+        navigator.clipboard.writeText(command);
+        setCopied(true);
+        setTimeout(() => setCopied(false), 2000);
+    };
+
     return (
         <div className="group relative bg-white/40 dark:bg-gray-900/40 backdrop-blur-xl rounded-[2.5rem] p-8 border border-white/50 dark:border-gray-800/50 shadow-xl hover:shadow-2xl transition-all duration-500 hover:-translate-y-1">
             {/* Sync Status Badge */}
@@ -152,30 +167,30 @@ function CaCard({ cert, isRoot, t, selectedOs, setSelectedOs }: { cert: CaCertif
                 </div>
             </div>
 
-            <div className="grid grid-cols-2 sm:grid-cols-4 gap-4">
+            <div className="grid grid-cols-2 lg:grid-cols-4 gap-3 sm:gap-4">
                 <DownloadBtn 
                     href={cert.cdn_url || `/api/public/ca-certificates/${cert.serial}/download`} 
-                    label={t('download_standard')} 
+                    label={t('download_standard') || "PEM"} 
                     icon={<FileIcon className="w-4 h-4" />}
                     onClick={() => {}}
                 />
                 <DownloadBtn 
                     href={cert.der_cdn_url || `/api/public/ca-certificates/${cert.serial}/download?format=der`} 
-                    label={t('download_android')} 
+                    label={t('download_android') || "Android/DER"} 
                     icon={<MobileIcon className="w-4 h-4" />}
                     onClick={() => setSelectedOs('mobile')}
                     variant="green"
                 />
                  <DownloadBtn 
                     href={cert.bat_cdn_url || `/api/public/ca-certificates/${cert.serial}/download/windows`} 
-                    label={t('download_windows')} 
+                    label={t('download_windows') || "Windows"} 
                     icon={<WindowsIcon className="w-4 h-4" />}
                     onClick={() => setSelectedOs('windows')}
                     variant="blue"
                 />
                  <DownloadBtn 
                     href={cert.mac_cdn_url || `/api/public/ca-certificates/${cert.serial}/download/mac`} 
-                    label={t('download_macos')} 
+                    label={t('download_macos') || "macOS"} 
                     icon={<AppleIcon className="w-4 h-4" />}
                     onClick={() => setSelectedOs('macos')}
                     variant="gray"
@@ -183,15 +198,27 @@ function CaCard({ cert, isRoot, t, selectedOs, setSelectedOs }: { cert: CaCertif
             </div>
             
             {cert.linux_cdn_url && (
-                 <div className="mt-4">
+                 <div className="mt-4 flex gap-3">
                      <DownloadBtn 
                         href={cert.linux_cdn_url || `/api/public/ca-certificates/${cert.serial}/download/linux`} 
-                        label={t('download_linux')} 
+                        label={t('download_linux') || "Linux (.sh)"} 
                         icon={<LinuxIcon className="w-4 h-4" />}
                         onClick={() => setSelectedOs('linux')}
                         variant="gray"
                         isFullWidth
                     />
+                    <button
+                        onClick={copyLinuxCli}
+                        className={`flex items-center justify-center gap-2 px-6 py-3 rounded-2xl border font-bold text-xs transition-all duration-300 active:scale-95 ${
+                            copied 
+                            ? 'bg-green-500 text-white border-green-500 shadow-lg' 
+                            : 'bg-brand-500 text-white border-brand-500 hover:bg-brand-600 shadow-md hover:shadow-xl'
+                        }`}
+                        title="Copy CLI Command"
+                    >
+                        {copied ? <CheckIcon className="w-4 h-4" /> : <CopyIcon className="w-4 h-4" />}
+                        {copied ? (t('copied') || "Copied!") : (t('copy_cli') || "Copy CLI")}
+                    </button>
                  </div>
             )}
         </div>
@@ -251,6 +278,18 @@ const FileIcon = ({ className }: { className?: string }) => (
     </svg>
 );
 
+const CopyIcon = ({ className }: { className?: string }) => (
+    <svg className={className} fill="none" viewBox="0 0 24 24" stroke="currentColor">
+        <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M8 5H6a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2v-1M8 5a2 2 0 002 2h2a2 2 0 002-2M8 5a2 2 0 012-2h2a2 2 0 012 2m0 0h2a2 2 0 012 2v3m2 4H10m0 0l3-3m-3 3l3 3" />
+    </svg>
+);
+
+const CheckIcon = ({ className }: { className?: string }) => (
+    <svg className={className} fill="none" viewBox="0 0 24 24" stroke="currentColor">
+        <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M5 13l4 4L19 7" />
+    </svg>
+);
+
 export default function HomeClient() {
     const t = useTranslations("Home");
     const [certificates, setCertificates] = useState<CaCertificate[]>([]);

src/messages/en.json

@@ -189,6 +189,8 @@
         "download_windows_title": "Download Windows Installer (.bat)",
         "download_macos_title": "Download macOS Profile (.mobileconfig)",
         "download_linux_title": "Download Linux Installer (.sh)",
+        "copy_cli": "Copy CLI",
+        "copied": "Copied!",
         "root_ca": "Root CA",
         "intermediate_ca": "Intermediate CA",
         "root_ca_hierarchy": "Root Trust Foundation",
@@ -210,9 +212,9 @@
             "Go to 'About' > 'Certificate Trust Settings' and enable full trust."
         ],
         "guide_steps_linux": [
-            "Download the .sh installer script.",
-            "Open terminal and run: sudo bash install-*.sh",
-            "The script will automatically detect and update your CA store."
+            "Use the one-liner command for instant setup (recommended):",
+            "curl -sL [URL] | sudo bash",
+            "Note: Get the [URL] by right-clicking the 'Linux' download button on the certificate card above."
         ],
         "guide_steps_mobile": [
             "Android: Settings > Security > Install from storage > CA Certificate.",

src/messages/id.json

@@ -189,6 +189,8 @@
         "download_windows_title": "Unduh Penginstal Windows (.bat)",
         "download_macos_title": "Unduh Profil macOS (.mobileconfig)",
         "download_linux_title": "Unduh Penginstal Linux (.sh)",
+        "copy_cli": "Salin CLI",
+        "copied": "Tersalin!",
         "root_ca": "Root CA",
         "intermediate_ca": "Intermediate CA",
         "root_ca_hierarchy": "Fondasi Kepercayaan Akar",
@@ -210,9 +212,9 @@
             "Buka 'About' > 'Certificate Trust Settings' dan aktifkan kepercayaan penuh."
         ],
         "guide_steps_linux": [
-            "Unduh skrip penginstal .sh.",
-            "Buka terminal dan jalankan: sudo bash install-*.sh",
-            "Skrip akan secara otomatis mendeteksi distro dan memperbarui penyimpanan CA Anda."
+            "Gunakan perintah satu-baris untuk instalasi instan (disarankan):",
+            "curl -sL [URL] | sudo bash",
+            "Catatan: Dapatkan [URL] dengan klik kanan tombol 'Linux' pada kartu sertifikat di atas lalu 'Salin Alamat Link'."
         ],
         "guide_steps_mobile": [
             "Android: Pengaturan > Keamanan > Instal dari penyimpanan > Sertifikat CA.",