feat(ux): epic UX design improvements across agents, chat, notes, and i18n

Comprehensive UI/UX updates including agent card redesign, chat container
improvements, note editor enhancements, memory echo notifications, and
updated translations for all 15 locales.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

keep-notes/app/(main)/chat/page.tsx

@@ -4,6 +4,7 @@ import { redirect } from 'next/navigation'
 import { prisma } from '@/lib/prisma'
 import { ChatContainer } from '@/components/chat/chat-container'
 import { getConversations } from '@/app/actions/chat-actions'
+import { getSystemConfig } from '@/lib/config'
 
 export const metadata: Metadata = {
   title: 'Chat IA | Memento',
@@ -17,19 +18,26 @@ export default async function ChatPage() {
   const userId = session.user.id
 
   // Fetch initial data
-  const [conversations, notebooks] = await Promise.all([
+  const [conversations, notebooks, config] = await Promise.all([
     getConversations(),
     prisma.notebook.findMany({
       where: { userId },
       orderBy: { order: 'asc' }
-    })
+    }),
+    getSystemConfig(),
   ])
 
+  // Check if web search tools are configured
+  const webSearchAvailable = !!(
+    config.WEB_SEARCH_PROVIDER || config.BRAVE_SEARCH_API_KEY || config.SEARXNG_URL || config.JINA_API_KEY
+  )
+
   return (
     <div className="flex-1 flex flex-col h-full bg-white dark:bg-[#1a1c22]">
-      <ChatContainer 
-        initialConversations={conversations} 
-        notebooks={notebooks} 
+      <ChatContainer
+        initialConversations={conversations}
+        notebooks={notebooks}
+        webSearchAvailable={webSearchAvailable}
       />
     </div>
   )