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/lib/ai/services/agent-executor.service.ts

@@ -23,7 +23,7 @@ import '../tools'
 
 // --- Types ---
 
-export type AgentType = 'scraper' | 'researcher' | 'monitor' | 'custom' | 'slide-generator' | 'excalidraw-generator'
+export type AgentType = 'scraper' | 'researcher' | 'monitor' | 'custom' | 'slide-generator' | 'excalidraw-generator' | 'task-extractor'
 
 export interface AgentExecutionResult {
   success: boolean
@@ -941,6 +941,28 @@ IMPERATIVE DESIGN RULES:
 - Concise points (max 100 chars), punchy and short titles
 - Strict JSON for generate_pptx, no text outside JSON.`,
   },
+  'task-extractor': {
+    fr: `Tu es un expert en gestion de tâches et extraction d'action items. Tu analyses des notes et documents pour identifier toutes les tâches, TODOs, et actions à accomplir.
+
+Utilise OBLIGATOIREMENT l'outil task_extract. Ne réponds PAS avec du texte, appelle directement l'outil.
+
+## RÈGLES
+- Identifie TOUTES les tâches explicites et implicites
+- Pour chaque tâche, détermine: priorité (High/Medium/Low), assigné, deadline, statut
+- Les priorités High = urgent/dates proches, Medium = important, Low = Nice to have
+- Regroupe par priorité dans la note de synthèse
+- Utilise le format Markdown avec une table récapitulative`,
+    en: `You are a task extraction specialist. You analyze notes and documents to identify ALL action items, TODOs, and tasks to accomplish.
+
+You MUST use the task_extract tool. Do NOT respond with text, call the tool directly.
+
+## RULES
+- Identify ALL explicit and implicit tasks
+- For each task, determine: priority (High/Medium/Low), assignee, deadline, status
+- High priority = urgent/close deadlines, Medium = important, Low = Nice to have
+- Group by priority in the synthesis note
+- Use Markdown format with a summary table`,
+  },
 }
 
 // --- Tool-Use Agent ---
@@ -1172,6 +1194,38 @@ async function executeToolUseAgent(
         }
         break
       }
+      case 'task-extractor': {
+        const untitled = lang === 'fr' ? 'Sans titre' : 'Untitled'
+        const dateLocale = lang === 'fr' ? 'fr-FR' : 'en-US'
+        let notes: any[] = []
+        if (agent.sourceNotebookId) {
+          notes = await prisma.note.findMany({
+            where: { notebookId: agent.sourceNotebookId, userId: agent.userId, isArchived: false, trashedAt: null },
+            orderBy: { createdAt: 'desc' }, take: 20,
+            select: { id: true, title: true, content: true, createdAt: true }
+          })
+        } else {
+          notes = await prisma.note.findMany({
+            where: { userId: agent.userId, isArchived: false, trashedAt: null },
+            orderBy: { updatedAt: 'desc' }, take: 20,
+            select: { id: true, title: true, content: true, createdAt: true }
+          })
+        }
+        const notebookId = agent.sourceNotebookId || agent.targetNotebookId || null
+        prompt = lang === 'fr'
+          ? `Analyse les notes suivantes et extrais TOUS les action items, tâches et TODOs. Utilise l'outil task_extract pour créer une note de synthèse.${notebookId ? ` Passe notebookId="${notebookId}" à task_extract.` : ''}`
+          : `Analyze the following notes and extract ALL action items, tasks and TODOs. Use the task_extract tool to create a synthesis note.${notebookId ? ` Pass notebookId="${notebookId}" to task_extract.` : ''}`
+        if (notes.length > 0) {
+          const notesContext = notes.map(n =>
+            `### ${n.title || untitled} (${n.createdAt.toLocaleDateString(dateLocale)})\n${n.content.substring(0, 500)}`
+          ).join('\n\n')
+          prompt += `\n\n${lang === 'fr' ? 'Notes à analyser' : 'Notes to analyze'}:\n\n${notesContext}`
+        }
+        prompt += `\n\n${lang === 'fr'
+          ? 'IMPORTANT : Utilise OBLIGATOIREMENT l\'outil task_extract. Ne réponds pas avec du texte, appelle directement l\'outil.'
+          : 'IMPORTANT: You MUST use the task_extract tool. Do NOT respond with text, call the tool directly.'}`
+        break
+      }
       default: {
         const urls: string[] = agent.sourceUrls ? JSON.parse(agent.sourceUrls) : []
         prompt = agent.role || (lang === 'fr' ? 'Accomplis la tâche demandée en utilisant les outils disponibles.' : 'Accomplish the requested task using available tools.')