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/lib/ai/tools/registry.ts

@@ -9,8 +9,11 @@ import { z } from 'zod'
 
 export interface ToolContext {
   userId: string
-  agentId: string
-  actionId: string
+  agentId?: string
+  actionId?: string
+  conversationId?: string
+  notebookId?: string
+  webSearch?: boolean
   config: Record<string, string>
 }
 
@@ -43,6 +46,29 @@ class ToolRegistry {
     return built
   }
 
+  /**
+   * Build tools for the chat endpoint.
+   * Includes internal tools (note_search, note_read) and web tools when configured.
+   */
+  buildToolsForChat(ctx: ToolContext): Record<string, any> {
+    const toolNames: string[] = ['note_search', 'note_read']
+
+    // Add web tools only when user toggled web search AND config is present
+    if (ctx.webSearch) {
+      const hasWebSearch = ctx.config.WEB_SEARCH_PROVIDER || ctx.config.BRAVE_SEARCH_API_KEY || ctx.config.SEARXNG_URL
+      if (hasWebSearch) {
+        toolNames.push('web_search')
+      }
+
+      const hasWebScrape = ctx.config.JINA_API_KEY
+      if (hasWebScrape) {
+        toolNames.push('web_scrape')
+      }
+    }
+
+    return this.buildToolsForAgent(toolNames, ctx)
+  }
+
   getAvailableTools(): Array<{ name: string; description: string; isInternal: boolean }> {
     return Array.from(this.tools.values()).map(t => ({
       name: t.name,