feat: Puente Mayúscula-Minúscula + TTS SpeechSynthesis + E2E fixes

lib/session-client.ts

@@ -0,0 +1,53 @@
+"use client"
+
+export interface SkillAttemptPayload {
+  skillCode: string
+  promptLevel: number
+  correct: boolean
+  responseMs: number
+}
+
+export interface SessionPayload {
+  childId: string
+  startedAt: string
+  endedAt: string
+  durationSec: number
+  skillsPracticed: string
+  attempts: SkillAttemptPayload[]
+}
+
+export async function syncSession(payload: SessionPayload): Promise<string | null> {
+  try {
+    const res = await fetch("/api/sessions/sync", {
+      method: "POST",
+      headers: { "Content-Type": "application/json" },
+      body: JSON.stringify({
+        childId: payload.childId,
+        session: {
+          startedAt: payload.startedAt,
+          endedAt: payload.endedAt,
+          durationSec: payload.durationSec,
+          skillsPracticed: payload.skillsPracticed,
+        },
+        attempts: payload.attempts,
+      }),
+    })
+    const data = await res.json()
+    return data.sessionId ?? null
+  } catch {
+    return null
+  }
+}
+
+export async function createMilestone(childId: string, skillCode: string): Promise<boolean> {
+  try {
+    const res = await fetch("/api/milestones", {
+      method: "POST",
+      headers: { "Content-Type": "application/json" },
+      body: JSON.stringify({ childId, skillCode }),
+    })
+    return res.ok
+  } catch {
+    return false
+  }
+}