feat: brainstorm sessions, PDF document Q&A, embedding fixes, and UI improvements

- Add brainstorm feature with collaborative canvas, AI idea generation, live cursors, playback, and export
- Add PDF upload/extraction/ingestion pipeline with pgvector document search (RAG)
- Add document Q&A overlay with streaming chat and PDF preview
- Add note attachments UI with status polling, grid layout, and auto-scroll
- Add task extraction AI tool and agent executor improvements
- Fix NoteEmbedding missing updatedAt column, re-index 66 notes with 1536-dim embeddings
- Fix brainstorm 'Create Note' button: add success toast and redirect to created note
- Fix memory echo notification infinite polling
- Fix chat route to always include document_search tool
- Add brainstorm i18n keys across all 14 locales
- Add socket server for real-time brainstorm collaboration
- Add hierarchical notebook selector and organize notebook dialog improvements
- Add sidebar brainstorm section with session management
- Update prisma schema with brainstorm tables, attachments, and document chunks

memento-note/components/agents/agent-detail-view.tsx

@@ -29,13 +29,14 @@ import {
   Loader2,
   BookOpen,
   LifeBuoy,
+  ListChecks,
 } from 'lucide-react'
 import { HierarchicalNotebookSelector } from '@/components/hierarchical-notebook-selector'
 import { toast } from 'sonner'
 import { useLanguage } from '@/lib/i18n'
 import { Tooltip, TooltipTrigger, TooltipContent } from '@/components/ui/tooltip'
 
-type AgentType = 'scraper' | 'researcher' | 'monitor' | 'custom' | 'slide-generator' | 'excalidraw-generator'
+type AgentType = 'scraper' | 'researcher' | 'monitor' | 'custom' | 'slide-generator' | 'excalidraw-generator' | 'task-extractor'
 
 function FieldHelp({ tooltip }: { tooltip: string }) {
   return (
@@ -59,6 +60,7 @@ const typeIcons: Record<string, typeof Globe> = {
   custom: Settings,
   'slide-generator': Presentation,
   'excalidraw-generator': Pencil,
+  'task-extractor': ListChecks,
 }
 
 const TOOL_PRESETS: Record<string, string[]> = {
@@ -68,6 +70,7 @@ const TOOL_PRESETS: Record<string, string[]> = {
   custom: ['memory_search'],
   'slide-generator': ['generate_pptx'],
   'excalidraw-generator': ['generate_excalidraw'],
+  'task-extractor': ['note_search', 'note_read', 'task_extract', 'note_create'],
 }
 
 interface AgentDetailViewProps {
@@ -386,6 +389,7 @@ export function AgentDetailView({
                         { value: 'custom' as AgentType, labelKey: 'agents.types.custom', descKey: 'agents.typeDescriptions.custom', icon: Settings },
                         { value: 'slide-generator' as AgentType, labelKey: 'agents.types.slideGenerator', descKey: 'agents.typeDescriptions.slideGenerator', icon: Presentation },
                         { value: 'excalidraw-generator' as AgentType, labelKey: 'agents.types.excalidrawGenerator', descKey: 'agents.typeDescriptions.excalidrawGenerator', icon: Pencil },
+                        { value: 'task-extractor' as AgentType, labelKey: 'agents.types.taskExtractor', descKey: 'agents.typeDescriptions.taskExtractor', icon: ListChecks },
                       ].map(at => {
                         const TypeIcon = at.icon
                         return (