fix: images, couverture, slash, agents, wizard, Stripe et admin

- Collage/accès images: ownership path userId + meta legacy, 403 non caché
- Couverture note: explicite (choix/aucune), plus d’auto depuis le corps
- Éditeur: suppression image TipTap, sync immédiate, toolbar réordonnée
- Slash: listes par titre (plus d’index), keywords nettoyés
- Agents: nextRun à la réactivation, cron sans stampede null
- Wizard: titres courts + mode Expert plus robuste
- Stripe checkout hosted fiable; admin métriques live; dark mode IA/settings
- Indexation notes courtes + test unit aligné

memento-note/components/note-editor/note-editor-context.tsx

@@ -332,10 +332,29 @@ export function NoteEditorProvider({ note, readOnly = false, fullPage = false, o
     setLinks(links.filter((_, i) => i !== index))
   }
 
+  /** Images extraites du corps (TipTap / markdown) — pas de couverture auto */
+  const contentImages = useMemo(() => {
+    if (isMarkdown) {
+      const urls = new Set<string>()
+      for (const match of content.matchAll(/!\[.*?\]\((.*?)\)/g)) {
+        const src = match[1]?.trim()
+        if (src) urls.add(src)
+      }
+      return Array.from(urls)
+    }
+    return extractImagesFromHTML(content)
+  }, [content, isMarkdown])
+
+  /**
+   * allImages = galerie explicite + corps (pour IA, sélecteur de couverture).
+   * La couverture hero n'utilise PAS allImages[0] automatiquement.
+   */
   const allImages = useMemo(() => {
-    const extracted = !isMarkdown ? extractImagesFromHTML(content) : []
-    return Array.from(new Set([...images, ...extracted]))
-  }, [images, content, isMarkdown])
+    return Array.from(new Set([...images, ...contentImages]))
+  }, [images, contentImages])
+
+  /** Couverture explicite = première entrée de note.images (jamais auto depuis le corps) */
+  const coverImage = images[0] ?? null
 
   const resolveContentForSave = useCallback((): string => {
     if (!isMarkdown) {
@@ -345,27 +364,32 @@ export function NoteEditorProvider({ note, readOnly = false, fullPage = false, o
     return contentRef.current
   }, [isMarkdown])
 
-  const resolveImagesForSave = useCallback((contentToSave: string): string[] => {
-    // Images présentes dans le contenu de l'éditeur (inline dans le HTML ou Markdown)
-    let contentImages: string[] = []
-    if (contentToSave) {
-      if (!isMarkdown) {
-        contentImages = extractImagesFromHTML(contentToSave)
-      } else {
-        const urls = new Set<string>()
-        const matches = contentToSave.matchAll(/!\[.*?\]\((.*?)\)/g)
-        for (const match of matches) {
-          const src = match[1]?.trim()
-          if (src) urls.add(src)
-        }
-        contentImages = Array.from(urls)
-      }
-    }
-    // Images "standalone" uploadées séparément (hors contenu éditeur), non supprimées
-    const standaloneImages = images.filter(url => !removedImageUrls.includes(url) && !contentImages.includes(url))
-    // Fusion dédupliquée : images du contenu + images standalone conservées
-    return Array.from(new Set([...contentImages, ...standaloneImages]))
-  }, [isMarkdown, images, removedImageUrls])
+  /**
+   * note.images = couverture / galerie **explicite** uniquement.
+   * Ne plus fusionner les images du corps : sinon, coller une image dans l'éditeur
+   * la plaçait sous le titre, et la supprimer du corps la laissait en "standalone" forever.
+   */
+  const resolveImagesForSave = useCallback((_contentToSave: string): string[] => {
+    return images.filter((url) => !removedImageUrls.includes(url))
+  }, [images, removedImageUrls])
+
+  const setCoverImage = useCallback((url: string) => {
+    setImages((prev) => {
+      const rest = prev.filter((u) => u !== url)
+      return [url, ...rest]
+    })
+    setRemovedImageUrls((prev) => prev.filter((u) => u !== url))
+    setIsDirty(true)
+  }, [])
+
+  const clearCoverImage = useCallback(() => {
+    setImages((prev) => {
+      if (prev.length === 0) return prev
+      setRemovedImageUrls((r) => Array.from(new Set([...r, ...prev])))
+      return []
+    })
+    setIsDirty(true)
+  }, [])
 
 
   const handleGenerateTitles = async () => {
@@ -902,6 +926,8 @@ export function NoteEditorProvider({ note, readOnly = false, fullPage = false, o
     isAnalyzingSuggestions,
     isMarkdown,
     allImages,
+    contentImages,
+    coverImage,
     colorClasses,
     quotaExceededFeature,
     autoSaveEnabled,
@@ -911,13 +937,14 @@ export function NoteEditorProvider({ note, readOnly = false, fullPage = false, o
     isGeneratingTitles, titleSuggestions, dismissedTitleSuggestions, isReformulating,
     reformulationModal, previousContentForCopilot, showReminderDialog, currentReminder,
     showLinkDialog, linkUrl, comparisonNotes, fusionNotes, dismissedTags, filteredSuggestions,
-    isAnalyzingSuggestions, isMarkdown, allImages, colorClasses, quotaExceededFeature, autoSaveEnabled
+    isAnalyzingSuggestions, isMarkdown, allImages, contentImages, coverImage, colorClasses, quotaExceededFeature, autoSaveEnabled
   ])
 
   const actions: NoteEditorActions = useMemo(() => ({
     setTitle: (t) => { setTitle(t); setIsDirty(true); setDismissedTitleSuggestions(true) },
     setDismissedTitleSuggestions,
     setContent: (c) => { setContent(c); setIsDirty(true) },
+    setContentImmediate: (c) => { setContentImmediate(c); setIsDirty(true) },
     setCheckItems,
     handleCheckItem,
     handleUpdateCheckItem,
@@ -930,6 +957,8 @@ export function NoteEditorProvider({ note, readOnly = false, fullPage = false, o
     setImages,
     handleImageUpload,
     handleRemoveImage,
+    setCoverImage,
+    clearCoverImage,
     uploadImageFile,
     setLinks,
     handleAddLink,
@@ -974,6 +1003,7 @@ export function NoteEditorProvider({ note, readOnly = false, fullPage = false, o
     setQuotaExceededFeature,
     toggleAutoSave,
   }), [
+    setContent, setContentImmediate, setCoverImage, clearCoverImage,
     handleCheckItem, handleUpdateCheckItem, handleAddCheckItem, handleRemoveCheckItem,
     handleSelectGhostTag, handleDismissGhostTag, handleRemoveLabel, handleImageUpload,
     handleRemoveImage, handleAddLink, handleRemoveLink, handleReminderSave,