feat: design system overhaul — sidebar, AI chats, settings, brainstorm, color cleanup

- Sidebar: dynamic brand-accent colors, brainstorm section restyled
- AI chat general: popup panel with expand/collapse, hides when contextual AI open
- AI chat contextual: tabs reordered (Actions first), X close button, height fix
- Settings: all tabs restyled, 6 new color presets (sage, terracotta, iron, etc.)
- Global color cleanup: emerald/orange hardcoded → brand-accent dynamic
- Brainstorm page: orange → brand-accent throughout
- PageEntry animation component added to key pages
- Floating AI button: bg-brand-accent instead of hardcoded black
- i18n: all 15 locales updated with new AI/billing keys
- Billing: freemium quota tracking, BYOK, stripe subscription scaffolding
- Admin: integrated into new design
- AGENTS.md + CLAUDE.md project rules added

memento-note/locales/es.json

@@ -55,7 +55,11 @@
     "freezePinnedNotebook": "Orden de fijación de la barra lateral del cuaderno",
     "unfreezePinnedNotebook": "Desanclar el orden de la barra lateral del cuaderno",
     "newSubNotebook": "Nuevo subportátil",
-    "renameNotebook": "Rebautizar"
+    "renameNotebook": "Rebautizar",
+    "sharedNotebookBadge": "· Shared",
+    "sortManual": "Orden libre",
+    "moveFailed": "Error al mover el cuaderno",
+    "dropToRoot": "Soltar aquí para mover a la raíz"
   },
   "notes": {
     "title": "Notas",
@@ -261,7 +265,11 @@
     "noteDeletedToast": "Nota eliminada.",
     "deleteNoteFailedToast": "No se pudo eliminar.",
     "documentInfoAria": "Información del documento",
-    "noModification": "Sin cambios"
+    "noModification": "Sin cambios",
+    "notes.emptyNotebook": "Empty notebook",
+    "notes.emptyNotebookDesc": "This notebook has no notes. Click + to create one.",
+    "notes.noNoteSelected": "No note selected",
+    "notes.selectOrCreateNote": "Select a note from the list or create a new one."
   },
   "pagination": {
     "previous": "←",
@@ -615,7 +623,14 @@
     "presentationReadyBadge": "Presentación lista",
     "openInLabTitle": "Abrir en el laboratorio",
     "inlineSummaryMarkdown": "**Resumen:**",
-    "networkErrorShort": "Error de red."
+    "networkErrorShort": "Error de red.",
+    "contextSourceHeading": "Context source",
+    "tones": {
+      "professional": "Professional",
+      "creative": "Creative",
+      "academic": "Academic",
+      "casual": "Casual"
+    }
   },
   "titleSuggestions": {
     "available": "Sugerencias de título",
@@ -1415,7 +1430,10 @@
     "fontFamilyLabel": "Familia de fuentes",
     "fontFamilyDescription": "Elige la fuente utilizada en toda la aplicación",
     "selectFontFamily": "Inter está optimizado para la legibilidad, Sistema usa la fuente nativa de tu sistema operativo",
-    "fontSystem": "Fuente del sistema predeterminada"
+    "fontSystem": "Fuente del sistema predeterminada",
+    "fontInterDefault": "Inter (default)",
+    "fontPlayfairDisplay": "Playfair Display",
+    "fontJetBrainsMono": "JetBrains Mono"
   },
   "generalSettings": {
     "title": "Configuración general",
@@ -1744,7 +1762,27 @@
       "includeImagesHint": "Extract images from scraped pages and attach them to the generated note",
       "back": "Back",
       "configuration": "Configuration",
-      "options": "Options"
+      "options": "Options",
+      "slideThemes": {
+        "modern_wellness": "Moderno y bienestar",
+        "business_authority": "Negocios y autoridad",
+        "nature_outdoors": "Naturaleza y aire libre",
+        "vintage_academic": "Vintage y académico",
+        "soft_creative": "Suave y creativo",
+        "bohemian": "Bohemio",
+        "vibrant_tech": "Vibrante y tech",
+        "craft_artisan": "Artesanía",
+        "tech_night": "Tech y noche (oscuro)",
+        "education_charts": "Educación y gráficos",
+        "forest_eco": "Bosque y eco",
+        "elegant_fashion": "Elegancia y moda",
+        "art_food": "Arte y gastronomía",
+        "luxury_mystery": "Lujo y misterio",
+        "pure_tech_blue": "Tech azul puro",
+        "coastal_coral": "Coral costero",
+        "vibrant_orange_mint": "Naranja vibrante y menta",
+        "platinum_white_gold": "Platino blanco y oro"
+      }
     },
     "frequencies": {
       "manual": "Manual",
@@ -2033,7 +2071,19 @@
     "superscript": "Sobrescrito",
     "subscript": "Subíndice",
     "addBlock": "Agregar bloque",
-    "placeholder": "Escriba '/' para los comandos..."
+    "placeholder": "Escriba '/' para los comandos...",
+    "aiReformulateFailed": "La IA no pudo procesar este texto. Inténtalo de nuevo.",
+    "translateTargets": {
+      "Francais": "Francés",
+      "English": "Inglés",
+      "Espanol": "Español",
+      "Deutsch": "Alemán",
+      "Persan": "Persa",
+      "Portugais": "Portugués",
+      "Italiano": "Italiano",
+      "Chinois": "Chino",
+      "Japonais": "Japonés"
+    }
   },
   "brainstorm": {
     "title": "Waves of Thought",
@@ -2098,6 +2148,181 @@
       "joined": "se unió a la sesión",
       "idea_dismissed": "descartó una idea",
       "invite_created": "creó una invitación"
+    },
+    "shareDialogTitle": "Share brainstorm",
+    "shareSearchLabel": "Find someone",
+    "shareNameOrEmailPlaceholder": "Name or email…",
+    "shareSubmit": "Share",
+    "shareSubmitting": "Sending…",
+    "shareFooterHint": "They will get a notification to accept or decline.",
+    "sharePublicLink": "Public link",
+    "shareGuestsCanEdit": "Allow guests to edit",
+    "feedbackInviteSent": "Invitation sent!",
+    "feedbackInviteResent": "Invitation resent!",
+    "feedbackAlreadyShared": "This person already has access to this brainstorm.",
+    "feedbackAlreadyPending": "An invitation is already pending for this person.",
+    "feedbackGenericError": "Error",
+    "unnamedPerson": "No name",
+    "canvasEditTitleReply": "Reply",
+    "canvasEditTitleNewIdea": "New idea",
+    "canvasPlaceholderReply": "Your reply…",
+    "canvasPlaceholderIdea": "Your idea…",
+    "canvasShortcutSave": "save",
+    "canvasShortcutCancel": "cancel",
+    "canvasChildBranch": "Child",
+    "canvasDoubleClickHint": "Double-click to add an idea",
+    "ideaDetailDescription": "Description",
+    "ideaDetailConnection": "Connection",
+    "ideaDetailNovelty": "Novelty",
+    "ideaDetailWave": "Wave",
+    "waveFlavorVariation": "Variation",
+    "waveFlavorAnalogy": "Analogy",
+    "waveFlavorDisruption": "Disruption",
+    "liveCollaborationTitle": "Live collaboration",
+    "liveStatus": "Live",
+    "liveYouMarker": "(You)",
+    "liveOtherParticipants": "{count} other participants",
+    "guestReadOnlyNotice": "You're viewing this brainstorm as a guest. Sign in to edit.",
+    "impactNotesEnriched": "{count} note(s) enriched",
+    "impactNotesMarkedDry": "{count} note(s) marked dry",
+    "impactSeparator": " · ",
+    "exportNotebookPrefix": "Notebook:",
+    "playbackStep": "Step {current}/{total}",
+    "playbackStepsCount": "{count} steps",
+    "playbackReturnToLive": "Return to live",
+    "canvasWaitingHint": "The canvas is waiting for your spark...",
+    "seedNodeBadge": "SEED",
+    "originalSeedDescription": "Original seed idea",
+    "convertedToNoteStatus": "Converted to note",
+    "toastExpandSuccess": "Ideas expanded!",
+    "toastExpandFailed": "Failed to expand",
+    "toastDismissSuccess": "Idea dismissed",
+    "toastDismissFailed": "Failed to dismiss",
+    "toastConvertSuccess": "Idea converted to note!",
+    "toastConvertFailed": "Failed to convert",
+    "toastExportNoteSuccess": "Exported as note!",
+    "toastExportFailed": "Failed to export",
+    "legendSeed": "Seed",
+    "legendVariations": "Variations",
+    "legendAnalogies": "Analogies",
+    "legendDisruptions": "Disruptions",
+    "exportFailedMessage": "Export failed",
+    "exportDefaultNotebookName": "Brainstorm",
+    "exportDefaultNoteTitle": "Synthesis",
+    "exportOpening": "Opening…",
+    "ownerBadge": "Owner",
+    "waveBadge": "Wave {wave}"
+  },
+  "usageMeter": {
+    "packName": "AI Discovery Pack",
+    "featureSearch": "Search",
+    "featureTags": "Tags",
+    "featureTitles": "Titles",
+    "unlimited": "Unlimited",
+    "remaining": "{count} left",
+    "upgradeTitle": "Upgrade to Pro",
+    "upgradeDescription": "You've used all your AI Discovery Pack credits. Upgrade to Pro for higher limits and additional features.",
+    "proIncludes": "Pro includes:",
+    "proSearch": "100 semantic searches / month",
+    "proTags": "200 auto-tags / month",
+    "proTitles": "200 auto-titles / month",
+    "proReformulate": "50 reformulations / month",
+    "proChat": "100 chat messages / month",
+    "later": "Later",
+    "upgradePricing": "Upgrade to Pro",
+    "addApiKey": "Use your own API key (BYOK)"
+  },
+  "byokSettings": {
+    "title": "Your API keys (BYOK)",
+    "description": "Connect your own LLM provider keys to bypass Discovery Pack quotas. Keys are encrypted at rest.",
+    "badgeActive": "BYOK active",
+    "tierRequired": "BYOK requires a Pro plan or higher. Upgrade to connect your API keys.",
+    "provider": "Provider",
+    "providerPlaceholder": "Select a provider",
+    "alias": "Label (optional)",
+    "aliasPlaceholder": "e.g. Work OpenAI",
+    "apiKey": "API key",
+    "apiKeyPlaceholder": "sk-...",
+    "save": "Save key",
+    "saved": "API key saved",
+    "deleted": "API key removed",
+    "error": "Could not save API key",
+    "loadError": "Could not load API keys",
+    "loading": "Loading keys...",
+    "empty": "No API keys configured yet.",
+    "confirmDelete": "Remove this API key permanently?",
+    "toggleActive": "Active",
+    "providers": {
+      "openai": "OpenAI",
+      "anthropic": "Anthropic",
+      "deepseek": "DeepSeek",
+      "openrouter": "OpenRouter",
+      "minimax": "MiniMax",
+      "zai": "Z.ai",
+      "google": "Google",
+      "mistral": "Mistral",
+      "glm": "GLM"
     }
+  },
+  "billing": {
+    "title": "Facturación",
+    "currentPlan": "Plan actual",
+    "upgradePlan": "Mejorar plan",
+    "manageBilling": "Gestionar facturación",
+    "manageDescription": "Actualizar método de pago, ver facturas o cancelar.",
+    "openPortal": "Abrir portal de facturación",
+    "renewsOn": "Se renueva el",
+    "expiresOn": "Expira el",
+    "canceledAt": "Cancelado — acceso hasta",
+    "freePlan": "Plan gratuito",
+    "proPlan": "Plan Pro",
+    "businessPlan": "Plan Business",
+    "enterprisePlan": "Plan Enterprise",
+    "perMonth": "/mes",
+    "perYear": "/año",
+    "monthly": "Mensual",
+    "annual": "Anual",
+    "save": "Ahorrar",
+    "upgradeTitle": "Elegir un plan",
+    "proPrice": "9,90 €",
+    "businessPrice": "29,90 €",
+    "proAnnualPrice": "99 €",
+    "businessAnnualPrice": "299 €",
+    "proFeature1": "100 búsquedas semánticas / mes",
+    "proFeature2": "200 etiquetas automáticas / mes",
+    "proFeature3": "50 reformulaciones / mes",
+    "proFeature4": "100 mensajes de chat / mes",
+    "businessFeature1": "1.000 búsquedas semánticas / mes",
+    "businessFeature2": "1.000 etiquetas automáticas / mes",
+    "businessFeature3": "500 reformulaciones / mes",
+    "businessFeature4": "1.000 mensajes de chat / mes",
+    "enterpriseTitle": "Enterprise",
+    "enterpriseDescription": "Cuotas personalizadas, SSO, soporte prioritario.",
+    "contactSales": "Contactar ventas",
+    "startCheckout": "Comenzar",
+    "checkoutLoading": "Cargando pago…",
+    "checkoutSuccess": "¡Suscripción activada! Bienvenido a {tier}.",
+    "checkoutCanceled": "Pago cancelado.",
+    "active": "Activo",
+    "trialing": "Prueba",
+    "pastDue": "Vencido",
+    "canceled": "Cancelado",
+    "inactive": "Inactivo",
+    "billingEnabled": "Facturación activada",
+    "billingDisabled": "La facturación no está activada en esta instancia.",
+    "usageThisPeriod": "Uso en este período",
+    "periodRange": "Período",
+    "unlimited": "Ilimitado",
+    "noUsage": "Sin datos de uso",
+    "billingHistory": "Historial de facturación",
+    "viewInvoices": "Gestionar facturas en el portal",
+    "nextBillingDate": "Próxima fecha de facturación",
+    "billingPeriod": "Período de facturación",
+    "planSince": "Miembro desde",
+    "checkoutSuccessTitle": "¡Suscripción activada!",
+    "checkoutSuccessBody": "Bienvenido a {tier}. Tus funciones están desbloqueadas.",
+    "subscriptionType": "subscriptionType",
+    "renewalDate": "renewalDate",
+    "noRenewalDate": "—"
   }
-}
+}