fix(ui): thème, textes et lisibilité restants de la revue

Les boutons suivent la couleur d’apparence, les libellés trop petits ou trop techniques sont clarifiés, et le catalogue des fournisseurs se met à jour tout seul.

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

memento-note/hooks/use-title-suggestions.ts

@@ -1,6 +1,7 @@
 import { useState, useEffect, useRef } from 'react'
 import { useDebounce } from './use-debounce'
 import { useAiConsent } from '@/components/legal/ai-consent-provider'
+import { countPlainWords, MIN_WORDS_FOR_AUTO_TITLE } from '@/lib/text/plain-text'
 
 export interface TitleSuggestion {
   title: string
@@ -29,10 +30,8 @@ export function useTitleSuggestions({ content, enabled = true }: UseTitleSuggest
       return
     }
 
-    const wordCount = debouncedContent.split(/\s+/).length
-
-    // Need at least 10 words
-    if (wordCount < 10) {
+    // Compter le texte visible, pas les balises de l’éditeur
+    if (countPlainWords(debouncedContent) < MIN_WORDS_FOR_AUTO_TITLE) {
       setSuggestions([])
       return
     }
@@ -65,8 +64,11 @@ export function useTitleSuggestions({ content, enabled = true }: UseTitleSuggest
         if (controller.signal.aborted) return
 
         if (!response.ok) {
-          const errorData = await response.json()
-          throw new Error(errorData.error || 'Error generating title suggestions')
+          setSuggestions([])
+          if (response.status !== 400) {
+            setError('Failed to generate title suggestions')
+          }
+          return
         }
 
         const data = await response.json()
@@ -74,6 +76,7 @@ export function useTitleSuggestions({ content, enabled = true }: UseTitleSuggest
       } catch (err: any) {
         if (err.name === 'AbortError') return
         console.error('Title suggestions error:', err)
+        setSuggestions([])
         setError('Failed to generate title suggestions')
       } finally {
         if (!controller.signal.aborted) {