fix(dashboard): audit Second Brain — pistes, erreur briefing, dark, crédits

Corrige loadPaths sans argument après Echo/IA, bannière si briefing en échec,
checklist connexion inversée, skeletons dark, libellé usage = solde unique.

memento-note/components/dashboard-view.tsx

@@ -246,13 +246,19 @@ export function DashboardView({ onNoteSelect }: DashboardViewProps) {
   const [echoRefreshing, setEchoRefreshing] = useState(false)
   const [dismissingInsightId, setDismissingInsightId] = useState<string | null>(null)
   const [actingBridgeSuggestionKey, setActingBridgeSuggestionKey] = useState<string | null>(null)
+  const [briefingError, setBriefingError] = useState(false)
 
   const loadBriefing = useCallback(async () => {
     try {
       const res = await fetch('/api/briefing', { cache: 'no-store' })
-      if (res.ok) setData(await res.json())
+      if (res.ok) {
+        setData(await res.json())
+        setBriefingError(false)
+      } else {
+        setBriefingError(true)
+      }
     } catch {
-      /* état dégradé */
+      setBriefingError(true)
     }
   }, [])
 
@@ -292,6 +298,36 @@ export function DashboardView({ onNoteSelect }: DashboardViewProps) {
     }
   }, [])
 
+  /** Recharge briefing puis enrichit les pistes (évite loadPaths() sans argument). */
+  const reloadBriefingAndPaths = useCallback(async () => {
+    try {
+      const res = await fetch('/api/briefing', { cache: 'no-store' })
+      if (!res.ok) {
+        setBriefingError(true)
+        return
+      }
+      const briefing = await res.json()
+      setData(briefing)
+      setBriefingError(false)
+      setPaths(buildFastPathsFromBriefing({
+        recentNotes: (briefing.recentNotes ?? []).map((n: BriefingNote) => ({
+          id: n.id,
+          title: n.title,
+          content: n.content,
+          notebookId: n.notebookId,
+        })),
+        inboxCount: briefing.inboxCount ?? 0,
+        dueFlashcards: briefing.dueFlashcards ?? 0,
+        insights: briefing.insights ?? [],
+        bridgeSuggestions: briefing.bridgeSuggestions ?? [],
+        agentSuggestions: briefing.agentSuggestions ?? [],
+      }))
+      await loadPaths(briefing)
+    } catch {
+      setBriefingError(true)
+    }
+  }, [loadPaths])
+
   const loadSentiment = useCallback(async () => {
     try {
       const res = await fetch('/api/briefing/sentiment', { cache: 'no-store' })
@@ -486,7 +522,7 @@ export function DashboardView({ onNoteSelect }: DashboardViewProps) {
       if (res.status === 403 && json.error === 'ai_consent_required') { await requestAiConsent(); return }
       if (!res.ok) throw new Error(json.error)
       if (json.insight) {
-        await Promise.all([loadBriefing(), loadPaths()])
+        await reloadBriefingAndPaths()
         emitAiUsageChanged()
         toast.success(t('homeDashboard.echoFound'))
       } else {
@@ -497,12 +533,12 @@ export function DashboardView({ onNoteSelect }: DashboardViewProps) {
     } finally {
       setEchoRefreshing(false)
     }
-  }, [requestAiConsent, loadBriefing, loadPaths, t])
+  }, [requestAiConsent, reloadBriefingAndPaths, t])
 
   const handleEnableAi = useCallback(async () => {
     await requestAiConsent()
-    await Promise.all([loadBriefing(), loadPaths()])
-  }, [requestAiConsent, loadBriefing, loadPaths])
+    await reloadBriefingAndPaths()
+  }, [requestAiConsent, reloadBriefingAndPaths])
 
   const handleDismissBridgeSuggestion = useCallback(async (s: BridgeSuggestionItem) => {
     const key = `${s.clusterAId}-${s.clusterBId}`
@@ -672,7 +708,8 @@ export function DashboardView({ onNoteSelect }: DashboardViewProps) {
     {
       key: 'connection',
       label: t('homeDashboard.dailyReviewConnection'),
-      done: pathsList.some(p => p.type === 'connect' || p.type === 'resurface'),
+      // Coché quand il n'y a plus de piste de connexion à traiter
+      done: !pathsList.some(p => p.type === 'connect' || p.type === 'resurface'),
       onClick: () => {
         const p = pathsList.find(x => x.type === 'connect' || x.type === 'resurface')
         if (p) handlePathAction(p)
@@ -853,8 +890,8 @@ export function DashboardView({ onNoteSelect }: DashboardViewProps) {
             />
             {briefingLoading ? (
               <div className="space-y-2">
-                <div className="h-10 rounded-lg bg-stone-50 animate-pulse" />
-                <div className="h-10 rounded-lg bg-stone-50 animate-pulse" />
+                <div className="h-10 rounded-lg bg-stone-50 dark:bg-zinc-950/40 animate-pulse" />
+                <div className="h-10 rounded-lg bg-stone-50 dark:bg-zinc-950/40 animate-pulse" />
               </div>
             ) : reminders.length === 0 ? (
               <p className="text-[11px] text-concrete italic py-1">{t('homeDashboard.allCaughtUp')}</p>
@@ -1021,6 +1058,20 @@ export function DashboardView({ onNoteSelect }: DashboardViewProps) {
       <div className="absolute inset-0 bg-[linear-gradient(to_right,#80808005_1px,transparent_1px),linear-gradient(to_bottom,#80808005_1px,transparent_1px)] bg-[size:28px_28px] pointer-events-none z-0" />
 
       <div className="w-full px-4 sm:px-6 lg:px-8 xl:px-10 2xl:px-12 py-6 sm:py-8 relative z-10">
+        {briefingError && !data && (
+          <div className="mb-4 rounded-xl border border-rose-500/30 bg-rose-500/5 px-4 py-3 flex flex-col sm:flex-row sm:items-center sm:justify-between gap-3">
+            <p className="text-sm text-ink dark:text-dark-ink">
+              {t('homeDashboard.briefingLoadError')}
+            </p>
+            <button
+              type="button"
+              onClick={() => { void reloadBriefingAndPaths() }}
+              className="shrink-0 text-[10px] font-mono font-bold uppercase tracking-wider px-3 py-2 rounded-lg bg-ink text-white dark:bg-white dark:text-black"
+            >
+              {t('homeDashboard.briefingRetry')}
+            </button>
+          </div>
+        )}
         {/* ── En-tête : orientation en 2 secondes ── */}
         <header className="mb-5">
           <div className="flex flex-col sm:flex-row sm:items-end sm:justify-between gap-2 pb-4 border-b border-border/20">