feat: running timers, symptom log, search, PDF export

- dashboard: ActiveTimers widget — live h:mm:ss for any in-progress timed event (breastfeed, nap, sleep, walk…), Terminer button patches endedAt
- dashboard: reorganised quick-log groups; Santé group (Température, Traitement, Symptôme)
- events: SYMPTOM type — tag chips (Fièvre, Reflux, Colique, Éruption, Toux, Congestion, Diarrhée, Vomissement, Irritabilité, Pleurs excessifs), stored in metadata.tags
- prisma: migration adding SYMPTOM to EventType enum
- search: GET /api/search (events by notes ILIKE, journal by content ILIKE), /search page with debounced input + keyword highlight
- nav: Recherche link added to LINKS + More drawer
- growth: PDF export button — generates formatted table with all measurements, zebra rows, downloads croissance-{name}.pdf

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

src/app/api/search/route.ts

@@ -0,0 +1,36 @@
+import { NextResponse } from "next/server";
+import { auth } from "@/lib/auth";
+import { prisma } from "@/lib/prisma";
+
+export async function GET(req: Request) {
+  const session = await auth();
+  if (!session?.user?.id) return NextResponse.json({ error: "Non autorisé" }, { status: 401 });
+
+  const { searchParams } = new URL(req.url);
+  const q = searchParams.get("q")?.trim() ?? "";
+  const babyId = searchParams.get("babyId");
+
+  if (!babyId || q.length < 2) return NextResponse.json({ events: [], notes: [] });
+
+  const [events, notes] = await Promise.all([
+    prisma.event.findMany({
+      where: {
+        babyId,
+        OR: [
+          { notes: { contains: q, mode: "insensitive" } },
+        ],
+      },
+      orderBy: { startedAt: "desc" },
+      take: 30,
+      include: { user: { select: { id: true, name: true } } },
+    }),
+    prisma.journalNote.findMany({
+      where: { babyId, content: { contains: q, mode: "insensitive" } },
+      orderBy: { date: "desc" },
+      take: 20,
+      include: { user: { select: { id: true, name: true } } },
+    }),
+  ]);
+
+  return NextResponse.json({ events, notes });
+}