restore .ideai/tickets/ store versionnέ + corrige .gitignore

- Restaure .ideai/tickets/ depuis 851f1f8^ (167 tickets + index.json + counter.json)
- Enlève les ignore rules .ideai/tickets/ dans .gitignore (ligne 51 et 75)
- Permet le suivi durable du store tickets futur
- Ne touche pas sdk/ (reste untracked)

.ideai/tickets/63/carnet.md

@@ -0,0 +1,6 @@
+---
+issueRef: "#63"
+version: 1
+updatedBy: {"kind":"user"}
+updatedAt: 1784098438671
+---

.ideai/tickets/63/issue.md

@@ -0,0 +1,15 @@
+---
+id: "b5753734-1474-48d5-af6c-4a41b78005dc"
+number: 63
+title: "Systeme de test de l'UI"
+status: "open"
+priority: "medium"
+sprint: null
+links: []
+agentRefs: []
+createdBy: {"kind":"user"}
+updatedBy: {"kind":"user"}
+createdAt: 1784098438671
+updatedAt: 1784098438671
+version: 1
+---