Extend localization coverage to UI components and common strings

- Added comprehensive common translations (online/offline, success/error, etc.)
- Localized status indicator component with all status states
- Updated FileManagerLeftSidebar toast messages for rename/delete operations
- Added translations for UI elements (close, toggle sidebar, etc.)
- Expanded placeholder translations for form inputs
- Added Chinese translations for all new common strings
- Improved consistency across component status messages

Co-Authored-By: Claude <noreply@anthropic.com>

public/locales/en/translation.json

@@ -1,5 +1,42 @@
 {
   "common": {
+    "close": "Close",
+    "online": "Online",
+    "offline": "Offline",
+    "maintenance": "Maintenance",
+    "degraded": "Degraded",
+    "discord": "Discord",
+    "error": "Error",
+    "warning": "Warning",
+    "info": "Info",
+    "success": "Success",
+    "loading": "Loading",
+    "required": "Required",
+    "optional": "Optional",
+    "toggleSidebar": "Toggle Sidebar",
+    "sidebar": "Sidebar",
+    "home": "Home",
+    "expired": "Expired",
+    "updateAvailable": "Update Available",
+    "noReleases": "No Releases",
+    "updatesAndReleases": "Updates & Releases",
+    "yourBackupCodes": "Your Backup Codes",
+    "sendResetCode": "Send Reset Code",
+    "verifyCode": "Verify Code",
+    "resetPassword": "Reset Password",
+    "resetCode": "Reset Code",
+    "newPassword": "New Password",
+    "sshPath": "SSH Path",
+    "localPath": "Local Path",
+    "folder": "Folder",
+    "file": "File",
+    "renamedSuccessfully": "renamed successfully",
+    "deletedSuccessfully": "deleted successfully",
+    "noAuthCredentials": "No authentication credentials available for this SSH host",
+    "noTunnelConnections": "No tunnel connections configured",
+    "sshTools": "SSH Tools",
+    "english": "English",
+    "chinese": "Chinese",
     "login": "Login",
     "logout": "Logout",
     "register": "Register",
@@ -505,6 +542,11 @@
     "external": "External (OIDC)"
   },
   "placeholders": {
+    "enterCode": "000000",
+    "ipAddress": "127.0.0.1",
+    "port": "22",
+    "maxRetries": "3",
+    "retryInterval": "10",
     "language": "Language",
     "username": "username",
     "hostname": "host name",