fix(observability): router conflict, logout button, missing i18n

- Fix chi duplicate Route() panic by consolidating read/write routes
  into single Route blocks with nested admin Group
- Add logout button to sidebar with token cleanup
- Add missing settingsAuth.password i18n key

web/src/lib/components/icons/IconLogout.svelte

@@ -0,0 +1,9 @@
+<script lang="ts">
+	interface Props { size?: number; class?: string; }
+	const { size = 24, class: className = '' }: Props = $props();
+</script>
+<svg width={size} height={size} viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class={className}>
+	<path d="M9 21H5a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h4" />
+	<polyline points="16 17 21 12 16 7" />
+	<line x1="21" y1="12" x2="9" y2="12" />
+</svg>

web/src/lib/components/icons/index.ts

@@ -47,3 +47,4 @@ export { default as IconWifi } from './IconWifi.svelte';
 export { default as IconRefresh } from './IconRefresh.svelte';
 export { default as IconProxies } from './IconProxies.svelte';
 export { default as IconEvents } from './IconEvents.svelte';
+export { default as IconLogout } from './IconLogout.svelte';

web/src/lib/i18n/en.json

@@ -9,7 +9,8 @@
     "deploy": "Deploy",
     "proxies": "Proxies",
     "events": "Events",
-    "settings": "Settings"
+    "settings": "Settings",
+    "logout": "Log out"
   },
   "dashboard": {
     "title": "Dashboard",
@@ -311,7 +312,8 @@
     "createFailed": "Failed to create user",
     "deleteFailed": "Failed to delete user",
     "deleteConfirm": "Are you sure you want to delete this user?",
-    "usernameRequired": "Username and password are required"
+    "usernameRequired": "Username and password are required",
+    "password": "Password"
   },
   "login": {
     "title": "Docker Watcher",

web/src/lib/i18n/ru.json

@@ -9,7 +9,8 @@
     "deploy": "Деплой",
     "proxies": "Прокси",
     "events": "События",
-    "settings": "Настройки"
+    "settings": "Настройки",
+    "logout": "Выйти"
   },
   "dashboard": {
     "title": "Панель управления",
@@ -311,7 +312,8 @@
     "createFailed": "Не удалось создать пользователя",
     "deleteFailed": "Не удалось удалить пользователя",
     "deleteConfirm": "Вы уверены, что хотите удалить этого пользователя?",
-    "usernameRequired": "Имя пользователя и пароль обязательны"
+    "usernameRequired": "Имя пользователя и пароль обязательны",
+    "password": "Пароль"
   },
   "login": {
     "title": "Docker Watcher",