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/lib/event-config.ts

@@ -10,7 +10,8 @@ export type EventType =
   | "TEMPERATURE"
   | "BATH"
   | "WALK"
-  | "TUMMY_TIME";
+  | "TUMMY_TIME"
+  | "SYMPTOM";
 
 export const EVENT_CONFIG: Record<
   EventType,
@@ -145,6 +146,16 @@ export const EVENT_CONFIG: Record<
     hasDuration: true,
     hasTimer: true,
   },
+  SYMPTOM: {
+    label: "Symptôme",
+    icon: "Activity",
+    color: "#dc2626",
+    colorClass: "text-red-600",
+    bgClass: "bg-red-50",
+    borderClass: "border-red-200",
+    hasDuration: false,
+    hasTimer: false,
+  },
 };
 
 export const ALL_EVENT_TYPES = Object.keys(EVENT_CONFIG) as EventType[];