feat: page interactive, démos Play/Step et simulateur Carnot

Ajoute le pipeline PageSpec (validation, rendu, publication /p/{slug}),
les démos TipTap /demo, et le simulateur Carnot (modes frigo/PAC/moteur,
énergie kJ vs puissance W, unités K/°C/°F) avec correctifs d’équations KaTeX.

Co-authored-by: Cursor <cursoragent@cursor.com>

memento-note/locales/en.json

@@ -38,7 +38,24 @@
     "createYourSpaceSubtitle": "Join the new era of smart note-taking.",
     "forgot": "Forgot?",
     "backToSite": "Back to site",
-    "privacyTerms": "© 2025 Memento Labs — Privacy · Terms"
+    "privacyTerms": "© 2025 Memento Labs — Privacy · Terms",
+    "checkEmailTitle": "Check your email",
+    "checkEmailDescription": "We sent a confirmation link to {email}. Open it to activate your account before signing in.",
+    "checkEmailDescriptionGeneric": "We sent a confirmation link to your email. Open it to activate your account before signing in.",
+    "resendVerification": "Resend confirmation email",
+    "verifyResent": "Confirmation email sent. Check your inbox.",
+    "verifyResendFailed": "Could not send the confirmation email. Try again later.",
+    "verifyMissingEmail": "Enter your email address.",
+    "verifyLoading": "Confirming your email…",
+    "verifySuccessTitle": "Email confirmed",
+    "verifySuccessDescription": "Your account is ready. You can now sign in.",
+    "verifyExpiredTitle": "Link expired",
+    "verifyExpiredDescription": "This confirmation link has expired. Request a new one.",
+    "verifyInvalidTitle": "Invalid link",
+    "verifyInvalidDescription": "This confirmation link is invalid or already used.",
+    "emailNotVerified": "Please confirm your email before signing in.",
+    "emailVerifiedBanner": "Email confirmed. You can sign in now.",
+    "invalidCredentials": "Invalid email or password."
   },
   "sidebar": {
     "notes": "Notes",
@@ -792,6 +809,18 @@
     "formal": "Formal",
     "casual": "Casual"
   },
+  "interactiveDemo": {
+    "invalid": "Invalid interactive demo",
+    "empty": "Interactive demo unavailable",
+    "step": "step",
+    "speed": "Playback speed",
+    "needMoreText": "Select at least ~20 words (or write more content) to generate a demo",
+    "generating": "Generating interactive demo…",
+    "generateSuccess": "Interactive demo inserted",
+    "generateFailed": "Demo generation failed",
+    "insertFailed": "Could not insert the demo",
+    "quotaExceeded": "Not enough AI quota"
+  },
   "memoryEcho": {
     "title": "I noticed something...",
     "description": "Proactive connections between your notes",
@@ -1602,7 +1631,58 @@
       "notSynced": "Not synced yet (cron /api/cron/sync-usage)",
       "byFeature": "By feature (PostgreSQL)",
       "topUsers": "Top users",
-      "noUsageData": "No usage data for this period yet"
+      "noUsageData": "No usage data for this period yet",
+      "healthTitle": "Stripe health check",
+      "healthDescription": "Runtime status of keys, webhooks, price IDs and billing flag (secrets are never shown).",
+      "healthSecret": "Secret key (server)",
+      "healthPublishable": "Publishable key",
+      "healthWebhook": "Webhook secret",
+      "healthBillingFlag": "Billing enabled",
+      "healthTrial": "Free trial",
+      "trialDaysValue": "{days} days on first checkout",
+      "modeTest": "Test mode (sk_test_…)",
+      "modeLive": "Live mode (sk_live_…)",
+      "modePlaceholder": "Placeholder / invalid key",
+      "modeMissing": "Not configured",
+      "configured": "Configured",
+      "missing": "Missing",
+      "enabled": "Enabled",
+      "disabled": "Disabled",
+      "priceStatusTitle": "Price IDs vs Stripe",
+      "colKey": "Plan",
+      "colPriceId": "Price ID",
+      "colSource": "Source",
+      "colStripe": "Stripe amount",
+      "priceError": "Lookup failed",
+      "inactive": "inactive",
+      "notChecked": "Not checked (no Stripe key)",
+      "subsTitle": "Subscriptions overview",
+      "subsDescription": "Counts from the local database (synced via Stripe webhooks).",
+      "statPaid": "Active + trial",
+      "statTrialing": "On trial",
+      "statPastDue": "Past due",
+      "statCanceling": "Cancel at period end",
+      "byTier": "By tier",
+      "byStatus": "By status",
+      "usersWithoutSub": "Users with no Subscription row",
+      "noSubs": "No subscriptions yet",
+      "recentSubs": "Recent paid / trial accounts",
+      "colUser": "User",
+      "colTier": "Tier",
+      "colStatus": "Status",
+      "colPeriod": "Period / trial end",
+      "canceling": "canceling",
+      "manualTier": "manual (no Stripe sub)",
+      "trialUntil": "Trial until {date}",
+      "testGuideTitle": "How to test Stripe locally",
+      "testGuideDescription": "Checklist to validate checkout, webhooks and trial.",
+      "testStep1": "Stripe Dashboard → Test mode ON. Create Pro/Business products + monthly/annual prices + credit packs.",
+      "testStep2": "Put sk_test_…, pk_test_… in .env. Put price_… IDs in Admin → Billing (or env) and enable billing.",
+      "testStep3": "Copy the whsec_… into STRIPE_WEBHOOK_SECRET and restart the app.",
+      "testStep4": "npm run dev → open /settings/billing as a BASIC user.",
+      "testStep5": "Start Pro checkout. Card: 4242 4242 4242 4242, any future expiry, any CVC. Expect a 7-day trial.",
+      "testStep6": "Confirm Admin → Billing shows TRIALING, and /settings/billing shows the trial end date.",
+      "testCardHint": "Other cards: 4000000000009995 = payment fails · 4000002500003155 = 3D Secure. Never use real cards in test mode."
     },
     "dashboard": {
       "title": "Dashboard",
@@ -1812,6 +1892,8 @@
     "featureBrainstormCreate": "Brainstorm creations",
     "featureBrainstormSessions": "Brainstorm sessions",
     "featureCharts": "AI Charts",
+    "featureInteractiveDemo": "Interactive demos",
+    "featureInteractivePage": "Interactive pages",
     "featurePublishEnhance": "AI Publishing",
     "featureBrainstormExpand": "Brainstorm expansions",
     "featureBrainstormEnrich": "Brainstorm enrichments",
@@ -2579,6 +2661,8 @@
     "slashTableDesc": "Insert a simple grid",
     "slashDatabase": "Structured View",
     "slashDatabaseDesc": "Embed your notebook's structured data",
+    "slashInteractiveDemo": "Interactive Demo",
+    "slashInteractiveDemoDesc": "AI step-by-step teaching demo (Play / Step)",
     "slashToggle": "Toggle Section",
     "slashToggleDesc": "Create a collapsible section",
     "slashCallout": "Callout",
@@ -2726,6 +2810,21 @@
     "publishTemplateMagazine": "Magazine article",
     "publishTemplateBrief": "Expert brief",
     "publishTemplateEssay": "Essay",
+    "publishTemplateInteractivePage": "Interactive page",
+    "publishInteractivePage": "Interactive page",
+    "publishInteractivePageHint": "AI-generated page: hero, sections, Play/Step demos — 20 credits",
+    "publishInteractivePageGenerating": "Building interactive page…",
+    "publishInteractivePageGeneratingWait": "Almost ready…",
+    "publishInteractivePageGeneratingLong": "Still working…",
+    "publishInteractivePagePlanning": "Analyzing content — planning the page…",
+    "publishInteractivePageSectionProgress": "Section {current}/{total}: {title}",
+    "publishInteractivePageFallback": "AI generation unavailable — showing simplified page",
+    "publishInteractivePagePartialFallback": "Some sections were generated in simplified mode",
+    "publishInteractivePageTooShort": "Note too short — add more content and try again",
+    "publishInteractivePageSuccess": "Interactive page published!",
+    "publishInteractivePageFailed": "Interactive page generation failed",
+    "publishInteractivePagePreviewHint": "Preview — review, then publish to the public URL",
+    "publishInteractivePageConfirm": "Publish page",
     "publishAiSuccess": "AI-enhanced page published!",
     "publishRewriteLabel": "Rewrite for the web",
     "publishRewriteOnHint": "Structures your editor blocks (exercises, toggles, callouts) for the web — AI writes only the intro",
@@ -3381,7 +3480,11 @@
     "fetchStatusFailed": "Failed to fetch billing status",
     "fetchQuotasFailed": "Failed to load credit usage",
     "fetchInvoicesFailed": "Failed to load billing history.",
-    "savePercent": "Save ~17%"
+    "savePercent": "Save ~17%",
+    "startTrialCta": "Start {days}-day free trial",
+    "trialFeature": "{days}-day free trial (card required)",
+    "trialEndsOn": "Your free trial ends on {date}. You will then be billed automatically.",
+    "trialEndsLabel": "Trial ends"
   },
   "quotaPaywall": {
     "title": "Out of AI credits",
@@ -3528,6 +3631,12 @@
       "perMonthAnnual": "/mo, billed yearly",
       "perUser": "+ €3.90/user",
       "perUserAnnual": "+ €2.90/user, yearly",
+      "savePercent": "Save ~17%",
+      "proMonthly": "€9.90",
+      "proAnnualMonthly": "€8.25",
+      "businessMonthly": "€29.90",
+      "businessAnnualMonthly": "€24.92",
+      "enterprisePrice": "Custom",
       "popular": "Most chosen",
       "basic": {
         "name": "Basic",
@@ -3572,7 +3681,10 @@
         "feature4": "Dedicated support",
         "feature5": "Live onboarding"
       },
-      "basicPrice": "Free"
+      "basicPrice": "Free",
+      "trialBadge": "{days}-day free trial",
+      "trialFeature": "{days}-day free trial (card required)",
+      "trialCta": "Start {days}-day free trial"
     },
     "cta": {
       "title": "Stop losing your best ideas.",

memento-note/locales/fr.json

@@ -38,7 +38,24 @@
     "createYourSpaceSubtitle": "Rejoignez la nouvelle ère de la prise de notes intelligente.",
     "forgot": "Oublié ?",
     "backToSite": "Retour",
-    "privacyTerms": "© 2025 Memento Labs — Confidentialité · Conditions"
+    "privacyTerms": "© 2025 Memento Labs — Confidentialité · Conditions",
+    "checkEmailTitle": "Vérifiez votre e-mail",
+    "checkEmailDescription": "Nous avons envoyé un lien de confirmation à {email}. Ouvrez-le pour activer votre compte avant de vous connecter.",
+    "checkEmailDescriptionGeneric": "Nous avons envoyé un lien de confirmation à votre e-mail. Ouvrez-le pour activer votre compte avant de vous connecter.",
+    "resendVerification": "Renvoyer l’e-mail de confirmation",
+    "verifyResent": "E-mail de confirmation envoyé. Vérifiez votre boîte de réception.",
+    "verifyResendFailed": "Impossible d’envoyer l’e-mail de confirmation. Réessayez plus tard.",
+    "verifyMissingEmail": "Saisissez votre adresse e-mail.",
+    "verifyLoading": "Confirmation de votre e-mail…",
+    "verifySuccessTitle": "E-mail confirmé",
+    "verifySuccessDescription": "Votre compte est prêt. Vous pouvez vous connecter.",
+    "verifyExpiredTitle": "Lien expiré",
+    "verifyExpiredDescription": "Ce lien de confirmation a expiré. Demandez-en un nouveau.",
+    "verifyInvalidTitle": "Lien invalide",
+    "verifyInvalidDescription": "Ce lien de confirmation est invalide ou déjà utilisé.",
+    "emailNotVerified": "Confirmez votre e-mail avant de vous connecter.",
+    "emailVerifiedBanner": "E-mail confirmé. Vous pouvez vous connecter.",
+    "invalidCredentials": "E-mail ou mot de passe incorrect."
   },
   "sidebar": {
     "notes": "Notes",
@@ -798,6 +815,18 @@
     "formal": "Formel",
     "casual": "Décontracté"
   },
+  "interactiveDemo": {
+    "invalid": "Démo interactive invalide",
+    "empty": "Démo interactive indisponible",
+    "step": "étape",
+    "speed": "Vitesse de lecture",
+    "needMoreText": "Sélectionne au moins ~20 mots (ou écris plus de contenu) pour générer une démo",
+    "generating": "Génération de la démo interactive…",
+    "generateSuccess": "Démo interactive insérée",
+    "generateFailed": "Échec de la génération",
+    "insertFailed": "Impossible d’insérer la démo",
+    "quotaExceeded": "Quota IA insuffisant"
+  },
   "memoryEcho": {
     "title": "💡 J'ai remarqué quelque chose...",
     "description": "Connexions proactives entre vos notes",
@@ -1608,7 +1637,58 @@
       "notSynced": "Pas encore synchronisé (cron /api/cron/sync-usage)",
       "byFeature": "Par fonctionnalité (PostgreSQL)",
       "topUsers": "Utilisateurs les plus actifs",
-      "noUsageData": "Aucune donnée pour cette période"
+      "noUsageData": "Aucune donnée pour cette période",
+      "healthTitle": "État Stripe",
+      "healthDescription": "Statut des clés, webhooks, price IDs et flag facturation (les secrets ne sont jamais affichés).",
+      "healthSecret": "Clé secrète (serveur)",
+      "healthPublishable": "Clé publique",
+      "healthWebhook": "Secret webhook",
+      "healthBillingFlag": "Facturation activée",
+      "healthTrial": "Essai gratuit",
+      "trialDaysValue": "{days} jours au premier checkout",
+      "modeTest": "Mode test (sk_test_…)",
+      "modeLive": "Mode live (sk_live_…)",
+      "modePlaceholder": "Clé placeholder / invalide",
+      "modeMissing": "Non configurée",
+      "configured": "Configuré",
+      "missing": "Manquant",
+      "enabled": "Activé",
+      "disabled": "Désactivé",
+      "priceStatusTitle": "Price IDs vs Stripe",
+      "colKey": "Offre",
+      "colPriceId": "Price ID",
+      "colSource": "Source",
+      "colStripe": "Montant Stripe",
+      "priceError": "Échec lecture",
+      "inactive": "inactif",
+      "notChecked": "Non vérifié (pas de clé Stripe)",
+      "subsTitle": "Vue des abonnements",
+      "subsDescription": "Compteurs depuis la base locale (synchronisée via webhooks Stripe).",
+      "statPaid": "Actifs + essai",
+      "statTrialing": "En essai",
+      "statPastDue": "Impayés",
+      "statCanceling": "Résiliation fin de période",
+      "byTier": "Par tier",
+      "byStatus": "Par statut",
+      "usersWithoutSub": "Utilisateurs sans ligne Subscription",
+      "noSubs": "Aucun abonnement pour l’instant",
+      "recentSubs": "Comptes payants / essai récents",
+      "colUser": "Utilisateur",
+      "colTier": "Tier",
+      "colStatus": "Statut",
+      "colPeriod": "Période / fin d’essai",
+      "canceling": "résiliation",
+      "manualTier": "manuel (pas de sub Stripe)",
+      "trialUntil": "Essai jusqu’au {date}",
+      "testGuideTitle": "Comment tester Stripe en local",
+      "testGuideDescription": "Checklist pour valider checkout, webhooks et essai.",
+      "testStep1": "Stripe Dashboard → mode Test ON. Créer produits Pro/Business + prix mensuel/annuel + packs crédits.",
+      "testStep2": "Mettre sk_test_…, pk_test_… dans .env. Mettre les price_… dans Admin → Facturation (ou env) et activer la facturation.",
+      "testStep3": "Copier le whsec_… dans STRIPE_WEBHOOK_SECRET et redémarrer l’app.",
+      "testStep4": "npm run dev → ouvrir /settings/billing avec un compte BASIC.",
+      "testStep5": "Lancer le checkout Pro. Carte : 4242 4242 4242 4242, date future, CVC quelconque. Essai 7 jours attendu.",
+      "testStep6": "Vérifier Admin → Facturation (TRIALING) et /settings/billing (date de fin d’essai).",
+      "testCardHint": "Autres cartes : 4000000000009995 = échec paiement · 4000002500003155 = 3D Secure. Jamais de vraie carte en mode test."
     },
     "dashboard": {
       "title": "Tableau de bord",
@@ -1818,6 +1898,8 @@
     "featureBrainstormCreate": "Créations brainstorm",
     "featureBrainstormSessions": "Sessions brainstorm",
     "featureCharts": "Graphiques IA",
+    "featureInteractiveDemo": "Démos interactives",
+    "featureInteractivePage": "Pages interactives",
     "featurePublishEnhance": "Publication IA",
     "featureBrainstormExpand": "Extensions brainstorm",
     "featureBrainstormEnrich": "Enrichissements brainstorm",
@@ -2585,6 +2667,8 @@
     "slashTableDesc": "Insérer un tableau simple",
     "slashDatabase": "Vue structurée",
     "slashDatabaseDesc": "Intégrer les données structurées de votre carnet",
+    "slashInteractiveDemo": "Démo interactive",
+    "slashInteractiveDemoDesc": "Démo pédagogique IA étape par étape (Play / Step)",
     "slashToggle": "Section repliable",
     "slashToggleDesc": "Créer une section dépliable",
     "slashCallout": "Encadré",
@@ -2732,6 +2816,21 @@
     "publishTemplateMagazine": "Article magazine",
     "publishTemplateBrief": "Fiche expert",
     "publishTemplateEssay": "Essai",
+    "publishTemplateInteractivePage": "Page interactive",
+    "publishInteractivePage": "Page interactive",
+    "publishInteractivePageHint": "Page générée par IA : hero, sections, démos Play/Step — 20 crédits",
+    "publishInteractivePageGenerating": "Construction de la page…",
+    "publishInteractivePageGeneratingWait": "Presque prêt…",
+    "publishInteractivePageGeneratingLong": "Toujours en cours…",
+    "publishInteractivePagePlanning": "Analyse du contenu — plan de la page…",
+    "publishInteractivePageSectionProgress": "Section {current}/{total} : {title}",
+    "publishInteractivePageFallback": "Génération IA indisponible — page simplifiée affichée",
+    "publishInteractivePagePartialFallback": "Certaines sections ont été générées en mode simplifié",
+    "publishInteractivePageTooShort": "Note trop courte — ajoutez du contenu puis réessayez",
+    "publishInteractivePageSuccess": "Page interactive publiée !",
+    "publishInteractivePageFailed": "Échec de la page interactive",
+    "publishInteractivePagePreviewHint": "Aperçu — vérifiez puis publiez sur l’URL publique",
+    "publishInteractivePageConfirm": "Publier la page",
     "publishAiSuccess": "Page publiée avec mise en page IA !",
     "publishRewriteLabel": "Reformuler pour le web",
     "publishRewriteOnHint": "Structure vos blocs éditeur (exercices, toggles, encadrés) en page web — l'IA rédige seulement le chapô",
@@ -3387,7 +3486,11 @@
     "fetchStatusFailed": "Échec du chargement des informations de facturation",
     "fetchQuotasFailed": "Échec du chargement des crédits",
     "fetchInvoicesFailed": "Impossible de charger l'historique de facturation.",
-    "savePercent": "Économisez ~17%"
+    "savePercent": "Économisez ~17%",
+    "startTrialCta": "Essai gratuit {days} jours",
+    "trialFeature": "Essai gratuit {days} jours (carte requise)",
+    "trialEndsOn": "Votre essai gratuit se termine le {date}. Vous serez ensuite facturé automatiquement.",
+    "trialEndsLabel": "Fin de l'essai"
   },
   "quotaPaywall": {
     "title": "Plus de crédits IA",
@@ -3534,6 +3637,12 @@
       "perMonthAnnual": "/mois, facturé à l'année",
       "perUser": "+ 3,90€/user",
       "perUserAnnual": "+ 2,90€/user, à l'année",
+      "savePercent": "~17 %",
+      "proMonthly": "9,90€",
+      "proAnnualMonthly": "8,25€",
+      "businessMonthly": "29,90€",
+      "businessAnnualMonthly": "24,92€",
+      "enterprisePrice": "Sur devis",
       "popular": "Le plus choisi",
       "basic": {
         "name": "Basic",
@@ -3578,7 +3687,10 @@
         "feature4": "Support dédié",
         "feature5": "Onboarding live"
       },
-      "basicPrice": "Gratuit"
+      "basicPrice": "Gratuit",
+      "trialBadge": "Essai gratuit {days} jours",
+      "trialFeature": "Essai gratuit {days} jours (carte requise)",
+      "trialCta": "Essayer {days} jours gratuitement"
     },
     "cta": {
       "title": "Arrêtez de perdre vos meilleures idées.",