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/services/agent-executor.service.ts

@@ -259,7 +259,7 @@ async function executeScraperAgent(
           const r = articleResults[i]
           if (r.status === 'fulfilled' && r.value) {
             const article = articlesToScrape[i]
-            const dateStr = article.pubDate ? ` — ${new Date(article.pubDate).toLocaleDateString(dateLocale)}` : ''
+            const dateStr = article.pubDate ? ` — ${new Date(article.pubDate).toISOString().split('T')[0]}` : ''
             scrapedParts.push(`## ${article.title}\n_Source: ${article.link}_${dateStr}\n\n${r.value.substring(0, 3000)}`)
             sourceLinks.push(article.link)
             articleCount++

keep-notes/lib/ai/tools/note-search.tool.ts

@@ -14,12 +14,13 @@ toolRegistry.register({
   isInternal: true,
   buildTool: (ctx) =>
     tool({
-      description: 'Search the user\'s notes by keyword or semantic meaning. Returns matching notes with titles and content excerpts.',
+      description: 'Search the user\'s notes by keyword or semantic meaning. Returns matching notes with titles and content excerpts. Optionally restrict to a specific notebook.',
       inputSchema: z.object({
         query: z.string().describe('The search query'),
         limit: z.number().optional().describe('Max results to return (default 5)').default(5),
+        notebookId: z.string().optional().describe('Optional notebook ID to restrict search to a specific notebook'),
       }),
-      execute: async ({ query, limit = 5 }) => {
+      execute: async ({ query, limit = 5, notebookId }) => {
         try {
           // Keyword fallback search using Prisma
           const keywords = query.toLowerCase().split(/\s+/).filter(w => w.length > 2)
@@ -31,6 +32,7 @@ toolRegistry.register({
           const notes = await prisma.note.findMany({
             where: {
               userId: ctx.userId,
+              ...(notebookId ? { notebookId } : {}),
               ...(conditions.length > 0 ? { OR: conditions } : {}),
               isArchived: false,
               trashedAt: null,

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,

keep-notes/lib/types.ts

@@ -75,6 +75,7 @@ export interface Note {
   notebookId?: string | null;
   notebook?: Notebook | null;
   autoGenerated?: boolean | null;
+  aiProvider?: string | null;
   // Search result metadata (optional)
   matchType?: 'exact' | 'related' | null;
   searchScore?: number | null;

keep-notes/lib/utils.ts

@@ -77,13 +77,14 @@ export function getHashColor(name: string): LabelColorName {
 }
 
 export function cosineSimilarity(vecA: number[], vecB: number[]): number {
-  if (vecA.length !== vecB.length) return 0;
+  if (!vecA.length || !vecB.length) return 0;
 
+  const minLen = Math.min(vecA.length, vecB.length);
   let dotProduct = 0;
   let mA = 0;
   let mB = 0;
 
-  for (let i = 0; i < vecA.length; i++) {
+  for (let i = 0; i < minLen; i++) {
     dotProduct += vecA[i] * vecB[i];
     mA += vecA[i] * vecA[i];
     mB += vecB[i] * vecB[i];