feat: finish all UI/UX improvements from backlog

- nav: aria-label on baby switcher select
- dashboard: active timers show baby name
- growth: PDF export includes percentile band per weight row
- settings: invite link note (permanent, reset if compromised)
- timeline: select mode toggle shows "Annuler" when active
- photos: delete photo from lightbox (PATCHes event metadata)
- notes: invisible date input overlay for date-jump via calendar picker
- IMPROVEMENTS.md: updated checkboxes, 8 remaining → 0

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/app/(app)/dashboard/page.tsx

@@ -84,7 +84,7 @@ function formatElapsed(startedAt: string, now: Date): string {
   return `${m}:${s.toString().padStart(2, "0")}`;
 }
 
-function ActiveTimers({ events, onStop }: { events: Event[]; onStop: () => void }) {
+function ActiveTimers({ events, onStop, babyName }: { events: Event[]; onStop: () => void; babyName?: string }) {
   const [now, setNow] = useState(() => new Date());
   const active = events.filter((e) => !e.endedAt && EVENT_CONFIG[e.type]?.hasTimer);
 
@@ -108,6 +108,7 @@ function ActiveTimers({ events, onStop }: { events: Event[]; onStop: () => void
             </div>
             <div className="flex-1 min-w-0">
               <p className="text-sm font-medium text-slate-700 dark:text-slate-200">{cfg.label}</p>
+              {babyName && <span className="text-xs text-slate-400">{babyName}</span>}
               <p className="text-xs text-slate-400 dark:text-slate-500">
                 Depuis {format(new Date(ev.startedAt), "HH:mm")}
               </p>
@@ -578,7 +579,7 @@ export default function DashboardPage() {
       <HandoffWidget events={events} userId={session?.user?.id ?? ""} />
 
       {/* Active timers */}
-      <ActiveTimers events={events} onStop={() => qc.invalidateQueries({ queryKey: ["events"] })} />
+      <ActiveTimers events={events} onStop={() => qc.invalidateQueries({ queryKey: ["events"] })} babyName={selectedBaby?.name} />
 
       {/* Pinned note + Quick note */}
       <div className="grid sm:grid-cols-2 gap-4 mb-6">