feat: fase 2+3 — expansion masiva multi-perfil + bug fixes + hardening

Fase 2 (expansion):
- Francesca: +6 etapas matematicas (5-10), +7 etapas lectura (3-9), +2 ortografia
- Sebastian: +8 etapas matematicas (4-11), +6 lectura, +3 historia, +3 geografia, +1 banderas
- Nuevas paginas: ortografia, lectura, geografia, matematicas
- ~900 ejercicios nuevos, paridad ~500 por perfil

Fase 3 (bug fixes + hardening):
- Fix: SessionLog auto-create en grade route
- Fix: engine cache (no borrar antes de revisar)
- Fix: FSRS cards actualizadas en flujo curriculum
- Fix: responseMs real (no hardcodeado 3000)
- Fix: options dentro de content en sebastian etapa-1
- Fix: trazo-letra consonantes crash
- Security: execFileSync anti-command-injection en TTS
- DB: 18 cascade deletes + indices + unique constraints
- APIs debug: reset, state, seed
- Docker: espeak-ng + prisma + user/group
- E2E: 23 tests nuevos (curriculum-flow.spec.ts)
- Code review: tailwind colors, middleware dev mode, eslint config

Verificado: tsc exit 0, build exit 0, 61 E2E tests pass

package.json

@@ -19,7 +19,6 @@
     "@radix-ui/react-progress": "^1.1.13",
     "@radix-ui/react-slot": "^1.1.0",
     "@radix-ui/react-tabs": "^1.1.18",
-    "@use-gesture/react": "^10.3.0",
     "better-auth": "^1.0.0",
     "class-variance-authority": "^0.7.0",
     "clsx": "^2.1.1",
@@ -27,7 +26,6 @@
     "lucide-react": "^0.400.0",
     "next": "^15.0.0",
     "perfect-freehand": "^1.2.0",
-    "prisma": "^5.20.0",
     "react": "^19.0.0",
     "react-dom": "^19.0.0",
     "recharts": "^2.12.0",
@@ -44,7 +42,8 @@
     "eslint": "^8.57.0",
     "eslint-config-next": "^15.0.0",
     "postcss": "^8.4.0",
+    "prisma": "^5.20.0",
     "tailwindcss": "^3.4.0",
-    "typescript": "^5.6.0"
+    "typescript": "5.8.2"
   }
 }