feat: publication IA (magazine/brief/essay) + fixes critique

Publication IA:
- 4 templates (magazine, brief, essay, simple) avec CSS riche
- Rewrite IA (article/exercises/tutorial/reference/mixed)
- Modération avec timeout 12s + fallback safe
- Quotas publish_enhance par tier (basic=2, pro=15, business=100)
- Détection contenu stale (hash)
- Migration DB publishedContent/publishedTemplate/publishedSourceHash

Fixes:
- cheerio v1.2: Element -> AnyNode (domhandler), decodeEntities cast
- _isShared ajouté au type Note (champ virtuel serveur)
- callout colors PDF export: extraction fonction pure testable
- admin/published: guard note.userId null
- Cmd+S fonctionne en mode dialog (pas seulement fullPage)

i18n:
- 23 clés publish* traduites dans les 15 locales
- Extension Web Clipper: 13 locales mise à jour

Tests:
- callout-colors.test.ts (6 tests)
- note-visible-in-view.test.ts (5 tests)
- entitlements.test.ts + byok-entitlements.test.ts: mock usageLog + unstubAllEnvs
- 199/199 tests passent

Tracker: user-stories.md sync avec sprint-status.yaml

docs/prd.md

@@ -29,19 +29,19 @@ inputDocuments:
 workflowType: 'prd'
 ---
 
-# Product Requirements Document - Momento
+# Product Requirements Document - Memento
 
 **Author:** User
 **Date:** 2026-05-14
 
 ## Executive Summary
 
-Momento Note democratizes access to an AI-augmented digital memory for a dual audience: self-taught individuals and enterprise R&D departments. As a next-generation Personal Knowledge Management system, it transforms note-taking from passive storage into an active, intelligent partner. By integrating vector-based semantic search and an ecosystem of autonomous agents, Momento automatically surfaces hidden connections, remembers forgotten insights, and accelerates knowledge work. 
+Memento Note democratizes access to an AI-augmented digital memory for a dual audience: self-taught individuals and enterprise R&D departments. As a next-generation Personal Knowledge Management system, it transforms note-taking from passive storage into an active, intelligent partner. By integrating vector-based semantic search and an ecosystem of autonomous agents, Memento automatically surfaces hidden connections, remembers forgotten insights, and accelerates knowledge work. 
 
 ### What Makes This Special
 
-Momento's true power lies in its seamless blend of advanced AI tools and innovative financial architecture:
-- **Autonomous Ecosystem:** Moving beyond a smart notepad, Momento acts as an autonomous "Second Brain." It deploys specialized agents (Scraper, Researcher, Monitor) and native productivity tools like Document Parsing (Chat-with-PDF) and Automated Task Extraction directly within the user's workspace.
+Memento's true power lies in its seamless blend of advanced AI tools and innovative financial architecture:
+- **Autonomous Ecosystem:** Moving beyond a smart notepad, Memento acts as an autonomous "Second Brain." It deploys specialized agents (Scraper, Researcher, Monitor) and native productivity tools like Document Parsing (Chat-with-PDF) and Automated Task Extraction directly within the user's workspace.
 - **Collaborative Brainstorming:** A real-time, D3-powered radial graph canvas allows users to generate, expand, and structure AI-driven ideas collaboratively.
 - **Sustainable "Host-Pays" Billing & BYOK:** Memento resolves the SaaS AI cost paradox through intelligent smart routing (defaulting to highly optimized models like DeepSeek V4 Flash) and a Bring-Your-Own-Key (BYOK) architecture that eliminates AI costs for power users. The innovative Freemium "AI Discovery Pack" provides lifetime access limits rather than restrictive monthly quotas, delivering an immediate "Aha!" moment without friction.
 
@@ -100,7 +100,7 @@ Momento's true power lies in its seamless blend of advanced AI tools and innovat
 
 ### 1. The Power User (BYOK & Autonomous Ecosystem)
 **Persona:** Alex, an independent data science researcher analyzing dense PDFs, frustrated by arbitrary SaaS API limits.
-**Opening Scene:** Alex discovers Momento through a watermark on a shared presentation. They sign up and are granted the Freemium "AI Discovery Pack."
+**Opening Scene:** Alex discovers Memento through a watermark on a shared presentation. They sign up and are granted the Freemium "AI Discovery Pack."
 **Rising Action:** Alex uploads a complex 50-page PDF and uses the Chat-with-PDF feature to extract methodologies. The AI's responses are rapid and accurate. Because Alex is doing heavy research, they quickly exhaust their Discovery Pack token limits.
 **Climax (The "Aha!" Moment):** Instead of hitting a hard paywall that locks them out, Memento elegantly prompts them to input their own LLM API key (BYOK). Alex pastes their DeepSeek key, and instantly, they are back to querying at near-zero marginal cost, entirely avoiding a rigid $20/mo subscription.
 **Resolution:** Alex fully adopts Memento as their "Second Brain", deploying autonomous Scraper agents to monitor new Arxiv papers directly into their semantic search index.
@@ -148,13 +148,13 @@ These journeys reveal the following critical capabilities we must build:
 
 ### Detected Innovation Areas
 
-1. **Financial Architecture (The "Host-Pays" + BYOK Model):** Momento solves the SaaS AI unit economics paradox. By shifting all collaborative AI generation costs exclusively to the session host's quotas—while simultaneously offering a zero-margin Bring-Your-Own-Key (BYOK) escape hatch—the platform eliminates the traditional per-seat LLM paywall friction that stifles viral growth.
+1. **Financial Architecture (The "Host-Pays" + BYOK Model):** Memento solves the SaaS AI unit economics paradox. By shifting all collaborative AI generation costs exclusively to the session host's quotas—while simultaneously offering a zero-margin Bring-Your-Own-Key (BYOK) escape hatch—the platform eliminates the traditional per-seat LLM paywall friction that stifles viral growth.
 2. **Autonomous Agent Ecosystem Native to PKM:** Integrating Scraper, Researcher, and Monitor agents directly into the note environment. Instead of users manually pulling data into their notes, the "Second Brain" actively structures and retrieves knowledge via vector-based semantic search.
 3. **Radial Graph-Based AI Brainstorming:** Moving away from linear chat interfaces (like standard ChatGPT) to a multi-directional, real-time D3 radial graph, where ideas expand outwards in "Waves" (Variations, Analogies, Disruptions).
 
 ### Market Context & Competitive Landscape
 
-Traditional PKM tools (like Notion or Obsidian) either charge heavy flat-rate AI add-ons ($10-$20/mo) or require highly technical, fragile plugin setups for local models. Conversely, standard whiteboard tools (Miro, FigJam) offer AI generation but lack the deep semantic connection to a user's personal knowledge base. Momento occupies the blue ocean between an enterprise collaboration whiteboard and an autonomous research assistant.
+Traditional PKM tools (like Notion or Obsidian) either charge heavy flat-rate AI add-ons ($10-$20/mo) or require highly technical, fragile plugin setups for local models. Conversely, standard whiteboard tools (Miro, FigJam) offer AI generation but lack the deep semantic connection to a user's personal knowledge base. Memento occupies the blue ocean between an enterprise collaboration whiteboard and an autonomous research assistant.
 
 ### Validation Approach
 
@@ -171,7 +171,7 @@ Traditional PKM tools (like Notion or Obsidian) either charge heavy flat-rate AI
 ## SaaS Web Application Specific Requirements
 
 ### Project-Type Overview
-Momento is a B2B and B2C SaaS platform serving as a multi-tenant personal knowledge management system. It requires complex state synchronization, robust role-based access controls for collaborative sessions, and an advanced hybrid billing architecture.
+Memento is a B2B and B2C SaaS platform serving as a multi-tenant personal knowledge management system. It requires complex state synchronization, robust role-based access controls for collaborative sessions, and an advanced hybrid billing architecture.
 
 ### Technical Architecture Considerations
 - **Frontend:** React + Next.js App Router, using D3.js for the Brainstorm radial graph and React Query for state management.