feat: dashboard Second Brain, essai 7 jours et vérification e-mail

Rendre le dashboard actionnable (inbox, peek, carte mentale), aligner la facturation sur l’essai 7 jours, et bloquer le login e-mail tant que l’adresse n’est pas confirmée.

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

memento-note/lib/interactive-page/schema.ts

@@ -7,7 +7,9 @@ import {
   INTERACTIVE_PAGE_SCHEMA_VERSION,
   PAGE_BLOCK_TYPES,
   SIM_CAPS,
+  STEPS_CAPS,
 } from './constants'
+import { isValidSimParamId } from './sim-eval'
 
 const intentSchema = z.enum(INTENT_IDS).optional()
 
@@ -90,6 +92,9 @@ const imageBlock = z.object({
 const simParamIdSchema = z
   .string()
   .regex(/^[A-Za-z_][A-Za-z0-9_]*$/, 'Invalid sim identifier')
+  .refine(isValidSimParamId, {
+    message: 'Identifier collides with a reserved constant/function',
+  })
 
 const genericSimParamSchema = z.object({
   id: simParamIdSchema,
@@ -150,6 +155,22 @@ const simBlock = z.object({
   caption: z.string().optional(),
 })
 
+const stepsBlock = z.object({
+  type: z.literal('steps'),
+  title: z.string().optional(),
+  steps: z
+    .array(
+      z.object({
+        tex: z.string().min(1),
+        rule: z.string().optional(),
+        speak: z.string().optional(),
+      })
+    )
+    .min(STEPS_CAPS.minSteps)
+    .max(STEPS_CAPS.maxSteps),
+  caption: z.string().optional(),
+})
+
 export const pageBlockSchema = z.discriminatedUnion('type', [
   proseBlock,
   formulaBlock,
@@ -160,6 +181,7 @@ export const pageBlockSchema = z.discriminatedUnion('type', [
   tableBlock,
   imageBlock,
   simBlock,
+  stepsBlock,
 ])
 
 const sectionSchema = z.object({
@@ -199,7 +221,7 @@ export const pageSpecV1Schema = z.object({
   overview: overviewSchema.optional(),
   sections: z
     .array(sectionSchema)
-    .min(1)
+    .min(2)
     .max(INTERACTIVE_PAGE_CAPS.maxSections),
   footer: z.string().optional(),
 })