feat(agents): refonte complète slide-generator + excalidraw-generator

Slide generator (generate_pptx):
- Pivot vers génération PowerPoint natif (pptxgenjs) au lieu de Reveal.js HTML
- 4 nouveaux layouts diagramme : timeline, process, comparison, metrics
- 2 nouveaux layouts image : image-content (texte + image), image-full (plein cadre)
- Redesign visuel de tous les layouts (cover split, section full-bleed, header band)
- Palettes corrigées : bg blanc sur toutes les palettes, contrastes réels
- fit:shrink systématique sur tous les textes pour éviter les débordements
- Extraction automatique des images des notes (Markdown/HTML) et injection dans le prompt IA
- Prompt IA renforcé : impose "style" et "theme" explicitement dans le JSON, impose ≥2 layouts diagramme
- Fix overlap timeline : zones de texte calculées sans collision avec les cercles
- Notification agent mise à jour : bouton download .pptx au lieu d'ouvrir HTML

Excalidraw generator:
- Layout Dagre/ELK pour graphes auto-positionnés
- Styles visuels : coloré, austère, sketch-plus (Virgil font)
- Zones/containers pour architecture-cloud
- Sanitisation du graphe et métriques de qualité de layout

Co-authored-by: Cursor <cursoragent@cursor.com>

memento-note/components/agents/agent-form.tsx

@@ -6,15 +6,15 @@
  * Novice-friendly: hides system prompt and tools behind "Advanced mode".
  */
 
-import { useState, useMemo, useRef } from 'react'
-import { X, Plus, Trash2, Globe, FileSearch, FilePlus, FileText, ExternalLink, Brain, ChevronDown, ChevronUp, HelpCircle, Mail, ImageIcon } from 'lucide-react'
+import { useState, useMemo, useRef, useCallback, useEffect } from 'react'
+import { X, Plus, Trash2, Globe, FileSearch, FilePlus, FileText, ExternalLink, Brain, ChevronDown, ChevronUp, HelpCircle, Mail, ImageIcon, Presentation, Pencil, Check } from 'lucide-react'
 import { toast } from 'sonner'
 import { useLanguage } from '@/lib/i18n'
 import { Tooltip, TooltipTrigger, TooltipContent } from '@/components/ui/tooltip'
 
 // --- Types ---
 
-type AgentType = 'scraper' | 'researcher' | 'monitor' | 'custom'
+type AgentType = 'scraper' | 'researcher' | 'monitor' | 'custom' | 'slide-generator' | 'excalidraw-generator'
 
 /** Small "?" tooltip shown next to form labels */
 function FieldHelp({ tooltip }: { tooltip: string }) {
@@ -41,6 +41,7 @@ interface AgentFormProps {
     role: string
     sourceUrls?: string | null
     sourceNotebookId?: string | null
+    sourceNoteIds?: string | null
     targetNotebookId?: string | null
     frequency: string
     tools?: string | null
@@ -50,6 +51,8 @@ interface AgentFormProps {
     scheduledTime?: string | null
     scheduledDay?: number | null
     timezone?: string | null
+    slideTheme?: string | null
+    slideStyle?: string | null
   } | null
   notebooks: { id: string; name: string; icon?: string | null }[]
   onSave: (data: FormData) => Promise<void>
@@ -62,6 +65,8 @@ const TOOL_PRESETS: Record<string, string[]> = {
   researcher: ['web_search', 'web_scrape', 'note_search', 'note_create', 'memory_search'],
   monitor: ['note_search', 'note_read', 'note_create', 'memory_search'],
   custom: ['memory_search'],
+  'slide-generator': ['generate_pptx'],
+  'excalidraw-generator': ['generate_excalidraw'],
 }
 
 // --- Shared class strings ---
@@ -89,6 +94,13 @@ export function AgentForm({ agent, notebooks, onSave, onCancel }: AgentFormProps
     return ['']
   })
   const [sourceNotebookId, setSourceNotebookId] = useState(agent?.sourceNotebookId || '')
+  const [sourceNoteIds, setSourceNoteIds] = useState<string[]>(() => {
+    if (agent?.sourceNoteIds) {
+      try { return JSON.parse(agent.sourceNoteIds) } catch { return [] }
+    }
+    return []
+  })
+  const [noteOptions, setNoteOptions] = useState<{ id: string; title: string }[]>([])
   const [targetNotebookId, setTargetNotebookId] = useState(agent?.targetNotebookId || '')
   const [frequency, setFrequency] = useState(agent?.frequency || 'manual')
   const [scheduledTime, setScheduledTime] = useState(agent?.scheduledTime || '08:00')
@@ -110,7 +122,36 @@ export function AgentForm({ agent, notebooks, onSave, onCancel }: AgentFormProps
   const [maxSteps, setMaxSteps] = useState(agent?.maxSteps || 10)
   const [notifyEmail, setNotifyEmail] = useState(agent?.notifyEmail || false)
   const [includeImages, setIncludeImages] = useState(agent?.includeImages || false)
+  const [slideTheme, setSlideTheme] = useState(agent?.slideTheme || '')
+  const [slideStyle, setSlideStyle] = useState<'soft' | 'sharp' | 'rounded' | 'pill'>(
+    (agent?.slideStyle as 'soft' | 'sharp' | 'rounded' | 'pill') || 'soft'
+  )
+  const [excalidrawStyle, setExcalidrawStyle] = useState<'default' | 'austere' | 'sketch-plus'>(() => {
+    if (agent?.slideStyle === 'austere') return 'austere'
+    if (agent?.slideStyle === 'sketch-plus') return 'sketch-plus'
+    return 'default'
+  })
+  const [excalidrawType, setExcalidrawType] = useState<'auto' | 'architecture-cloud' | 'flowchart' | 'mindmap' | 'org-chart' | 'timeline' | 'process-map'>(() => {
+    const value = (agent?.slideTheme || '').trim()
+    if (value === 'auto' || value === 'architecture-cloud' || value === 'mindmap' || value === 'org-chart' || value === 'timeline' || value === 'process-map') return value
+    return 'flowchart'
+  })
   const [isSaving, setIsSaving] = useState(false)
+
+  useEffect(() => {
+    if (!sourceNotebookId || (type !== 'slide-generator' && type !== 'excalidraw-generator' && type !== 'monitor')) {
+      setNoteOptions([])
+      return
+    }
+    fetch(`/api/notes?notebookId=${sourceNotebookId}&limit=50`)
+      .then(r => r.json())
+      .then(data => {
+        const notes = Array.isArray(data.data) ? data.data : Array.isArray(data) ? data : []
+        setNoteOptions(notes.map((n: any) => ({ id: n.id, title: n.title || 'Sans titre' })))
+      })
+      .catch(() => setNoteOptions([]))
+  }, [sourceNotebookId, type])
+
   const [showAdvanced, setShowAdvanced] = useState(() => {
     // Auto-open advanced if editing an agent with custom tools or custom prompt
     if (agent?.tools) {
@@ -133,6 +174,9 @@ export function AgentForm({ agent, notebooks, onSave, onCancel }: AgentFormProps
     { id: 'note_create', icon: FilePlus, labelKey: 'agents.tools.noteCreate', external: false },
     { id: 'url_fetch', icon: ExternalLink, labelKey: 'agents.tools.urlFetch', external: false },
     { id: 'memory_search', icon: Brain, labelKey: 'agents.tools.memorySearch', external: false },
+    { id: 'generate_pptx', icon: Presentation, labelKey: 'agents.tools.generatePptx', external: false },
+    { id: 'generate_slides', icon: Presentation, labelKey: 'agents.tools.generateSlides', external: false },
+    { id: 'generate_excalidraw', icon: Pencil, labelKey: 'agents.tools.generateExcalidraw', external: false },
   ], [])
 
   // Track previous type to detect user-initiated type changes
@@ -172,10 +216,14 @@ export function AgentForm({ agent, notebooks, onSave, onCancel }: AgentFormProps
       formData.set('frequency', frequency)
       formData.set('targetNotebookId', targetNotebookId)
 
-      if (type === 'monitor') {
+      if (type === 'monitor' || type === 'slide-generator' || type === 'excalidraw-generator') {
         formData.set('sourceNotebookId', sourceNotebookId)
       }
 
+      if (sourceNoteIds.length > 0) {
+        formData.set('sourceNoteIds', JSON.stringify(sourceNoteIds))
+      }
+
       const validUrls = urls.filter(u => u.trim())
       if (validUrls.length > 0) {
         formData.set('sourceUrls', JSON.stringify(validUrls))
@@ -189,6 +237,15 @@ export function AgentForm({ agent, notebooks, onSave, onCancel }: AgentFormProps
       formData.set('scheduledDay', String(scheduledDay))
       formData.set('timezone', timezone)
 
+      if (type === 'slide-generator') {
+        if (slideTheme) formData.set('slideTheme', slideTheme)
+        formData.set('slideStyle', slideStyle)
+      }
+      if (type === 'excalidraw-generator') {
+        formData.set('slideTheme', excalidrawType)
+        formData.set('slideStyle', excalidrawStyle)
+      }
+
       await onSave(formData)
     } catch {
       toast.error(t('agents.toasts.saveError'))
@@ -197,12 +254,14 @@ export function AgentForm({ agent, notebooks, onSave, onCancel }: AgentFormProps
     }
   }
 
-  const showSourceNotebook = type === 'monitor'
+  const showSourceNotebook = type === 'monitor' || type === 'slide-generator' || type === 'excalidraw-generator'
 
   const agentTypes: { value: AgentType; labelKey: string; descKey: string }[] = [
     { value: 'researcher', labelKey: 'agents.types.researcher', descKey: 'agents.typeDescriptions.researcher' },
     { value: 'scraper', labelKey: 'agents.types.scraper', descKey: 'agents.typeDescriptions.scraper' },
     { value: 'monitor', labelKey: 'agents.types.monitor', descKey: 'agents.typeDescriptions.monitor' },
+    { value: 'slide-generator', labelKey: 'agents.types.slideGenerator', descKey: 'agents.typeDescriptions.slideGenerator' },
+    { value: 'excalidraw-generator', labelKey: 'agents.types.excalidrawGenerator', descKey: 'agents.typeDescriptions.excalidrawGenerator' },
     { value: 'custom', labelKey: 'agents.types.custom', descKey: 'agents.typeDescriptions.custom' },
   ]
 
@@ -318,13 +377,13 @@ export function AgentForm({ agent, notebooks, onSave, onCancel }: AgentFormProps
             </div>
           )}
 
-          {/* Source Notebook (monitor only) */}
+          {/* Source Notebook (monitor, slide, excalidraw) */}
           {showSourceNotebook && (
             <div>
               <label className={labelCls}>{t('agents.form.sourceNotebook')}<FieldHelp tooltip={t('agents.help.tooltips.sourceNotebook')} /></label>
               <select
                 value={sourceNotebookId}
-                onChange={e => setSourceNotebookId(e.target.value)}
+                onChange={e => { setSourceNotebookId(e.target.value); setSourceNoteIds([]) }}
                 className={selectCls}
               >
                 <option value="">{t('agents.form.selectNotebook')}</option>
@@ -337,7 +396,149 @@ export function AgentForm({ agent, notebooks, onSave, onCancel }: AgentFormProps
             </div>
           )}
 
-          {/* Target Notebook */}
+          {/* Note multi-select (slide-generator, excalidraw-generator only) */}
+          {(type === 'slide-generator' || type === 'excalidraw-generator') && sourceNotebookId && noteOptions.length > 0 && (
+            <div>
+              <label className={labelCls}>{t('agents.form.selectNotes')}<FieldHelp tooltip={t('agents.help.tooltips.selectNotes')} /></label>
+              <div className="border border-input rounded-lg max-h-48 overflow-y-auto bg-card">
+                {noteOptions.map(note => {
+                  const isSelected = sourceNoteIds.includes(note.id)
+                  return (
+                    <button
+                      key={note.id}
+                      type="button"
+                      onClick={() => {
+                        setSourceNoteIds(prev =>
+                          isSelected ? prev.filter(id => id !== note.id) : [...prev, note.id]
+                        )
+                      }}
+                      className={`w-full flex items-center gap-2 px-3 py-2 text-sm text-left hover:bg-accent/50 transition-colors ${isSelected ? 'bg-primary/5' : ''}`}
+                    >
+                      <div className={`w-4 h-4 rounded border-2 flex items-center justify-center flex-shrink-0 ${isSelected ? 'border-primary bg-primary' : 'border-input'}`}>
+                        {isSelected && <Check className="w-3 h-3 text-primary-foreground" />}
+                      </div>
+                      <span className={isSelected ? 'text-primary font-medium' : 'text-foreground'}>{note.title}</span>
+                    </button>
+                  )
+                })}
+              </div>
+              {sourceNoteIds.length > 0 && (
+                <p className="text-xs text-muted-foreground mt-1">{t('agents.form.notesSelected', { count: sourceNoteIds.length })}</p>
+              )}
+            </div>
+          )}
+
+          {/* Theme selector — slide-generator only */}
+          {type === 'slide-generator' && (
+            <>
+              <div>
+                <label className={labelCls}>{t('agents.form.slideTheme')}<FieldHelp tooltip={t('agents.help.tooltips.slideTheme')} /></label>
+                <select
+                  value={slideTheme}
+                  onChange={e => setSlideTheme(e.target.value)}
+                  className={selectCls}
+                >
+                  <option value="">{t('agents.form.slideThemeDefault')}</option>
+                  <option value="modern_wellness">Modern & Wellness</option>
+                  <option value="business_authority">Business & Authority</option>
+                  <option value="nature_outdoors">Nature & Outdoors</option>
+                  <option value="vintage_academic">Vintage & Academic</option>
+                  <option value="soft_creative">Soft & Creative</option>
+                  <option value="bohemian">Bohemian</option>
+                  <option value="vibrant_tech">Vibrant & Tech</option>
+                  <option value="craft_artisan">Craft & Artisan</option>
+                  <option value="tech_night">Tech & Night (dark)</option>
+                  <option value="education_charts">Education & Charts</option>
+                  <option value="forest_eco">Forest & Eco</option>
+                  <option value="elegant_fashion">Elegant & Fashion</option>
+                  <option value="art_food">Art & Food</option>
+                  <option value="luxury_mystery">Luxury & Mystery</option>
+                  <option value="pure_tech_blue">Pure Tech Blue</option>
+                  <option value="coastal_coral">Coastal Coral</option>
+                  <option value="vibrant_orange_mint">Vibrant Orange Mint</option>
+                  <option value="platinum_white_gold">Platinum White Gold</option>
+                </select>
+              </div>
+              <div>
+                <label className={labelCls}>{t('agents.form.slideStyle')}<FieldHelp tooltip={t('agents.help.tooltips.slideStyle')} /></label>
+                <div className="grid grid-cols-2 gap-2">
+                  {(['soft', 'sharp', 'rounded', 'pill'] as const).map(s => (
+                    <button
+                      key={s}
+                      type="button"
+                      onClick={() => setSlideStyle(s)}
+                      className={`px-3 py-2 rounded-lg border-2 text-sm transition-all text-left ${
+                        slideStyle === s
+                          ? 'border-primary bg-primary/5 text-primary font-medium'
+                          : `${toggleOffBorder} text-muted-foreground`
+                      }`}
+                    >
+                      {t(`agents.form.slideStyle${s.charAt(0).toUpperCase() + s.slice(1)}` as any)}
+                    </button>
+                  ))}
+                </div>
+              </div>
+            </>
+          )}
+
+          {/* Visual style selector — excalidraw-generator only */}
+          {type === 'excalidraw-generator' && (
+            <>
+              <div>
+                <label className={labelCls}>{t('agents.form.excalidrawDiagramType')}</label>
+                <div className="grid grid-cols-1 gap-2">
+                  {([
+                    { id: 'auto', labelKey: 'agents.form.excalidrawDiagramTypeAuto' },
+                    { id: 'flowchart', labelKey: 'agents.form.excalidrawDiagramTypeFlowchart' },
+                    { id: 'mindmap', labelKey: 'agents.form.excalidrawDiagramTypeMindmap' },
+                    { id: 'org-chart', labelKey: 'agents.form.excalidrawDiagramTypeOrgChart' },
+                    { id: 'timeline', labelKey: 'agents.form.excalidrawDiagramTypeTimeline' },
+                    { id: 'process-map', labelKey: 'agents.form.excalidrawDiagramTypeProcessMap' },
+                    { id: 'architecture-cloud', labelKey: 'agents.form.excalidrawDiagramTypeArchitectureCloud' },
+                  ] as const).map((opt) => (
+                    <button
+                      key={opt.id}
+                      type="button"
+                      onClick={() => setExcalidrawType(opt.id)}
+                      className={`px-3 py-2 rounded-lg border-2 text-sm transition-all text-left ${
+                        excalidrawType === opt.id
+                          ? 'border-primary bg-primary/5 text-primary font-medium'
+                          : `${toggleOffBorder} text-muted-foreground`
+                      }`}
+                    >
+                      {t(opt.labelKey)}
+                    </button>
+                  ))}
+                </div>
+              </div>
+              <div>
+                <label className={labelCls}>{t('agents.form.excalidrawDiagramStyle')}</label>
+                <div className="grid grid-cols-2 gap-2">
+                  {([
+                    { id: 'default', labelKey: 'agents.form.excalidrawDiagramStyleDefault' },
+                    { id: 'sketch-plus', labelKey: 'agents.form.excalidrawDiagramStyleSketchPlus' },
+                    { id: 'austere', labelKey: 'agents.form.excalidrawDiagramStyleAustere' },
+                  ] as const).map((opt) => (
+                    <button
+                      key={opt.id}
+                      type="button"
+                      onClick={() => setExcalidrawStyle(opt.id)}
+                      className={`px-3 py-2 rounded-lg border-2 text-sm transition-all text-left ${
+                        excalidrawStyle === opt.id
+                          ? 'border-primary bg-primary/5 text-primary font-medium'
+                          : `${toggleOffBorder} text-muted-foreground`
+                      }`}
+                    >
+                      {t(opt.labelKey)}
+                    </button>
+                  ))}
+                </div>
+              </div>
+            </>
+          )}
+
+          {/* Target Notebook — hidden for file generators (they never create notes) */}
+          {type !== 'slide-generator' && type !== 'excalidraw-generator' && (
           <div>
             <label className={labelCls}>{t('agents.form.targetNotebook')}<FieldHelp tooltip={t('agents.help.tooltips.targetNotebook')} /></label>
             <select
@@ -353,6 +554,7 @@ export function AgentForm({ agent, notebooks, onSave, onCancel }: AgentFormProps
               ))}
             </select>
           </div>
+          )}
 
           {/* Frequency */}
           <div>
@@ -423,7 +625,8 @@ export function AgentForm({ agent, notebooks, onSave, onCancel }: AgentFormProps
             </div>
           )}
 
-          {/* Email Notification */}
+          {/* Email Notification — hidden for file generators */}
+          {type !== 'slide-generator' && type !== 'excalidraw-generator' && (
           <div
             onClick={() => setNotifyEmail(!notifyEmail)}
             className={`flex items-center gap-3 p-3 rounded-lg border-2 cursor-pointer transition-all ${
@@ -441,8 +644,10 @@ export function AgentForm({ agent, notebooks, onSave, onCancel }: AgentFormProps
               <div className={`w-4 h-4 bg-card rounded-full shadow-sm transition-transform mt-0.5 ${notifyEmail ? 'translate-x-4.5 ml-0.5' : 'ml-0.5'}`} />
             </div>
           </div>
+          )}
 
-          {/* Include Images */}
+          {/* Include Images — hidden for file generators */}
+          {type !== 'slide-generator' && type !== 'excalidraw-generator' && (
           <div
             onClick={() => setIncludeImages(!includeImages)}
             className={`flex items-center gap-3 p-3 rounded-lg border-2 cursor-pointer transition-all ${
@@ -460,6 +665,7 @@ export function AgentForm({ agent, notebooks, onSave, onCancel }: AgentFormProps
               <div className={`w-4 h-4 bg-card rounded-full shadow-sm transition-transform mt-0.5 ${includeImages ? 'translate-x-4.5 ml-0.5' : 'ml-0.5'}`} />
             </div>
           </div>
+          )}
 
           {/* Advanced mode toggle */}
           <button