v3 : socle Rust (moteur pur, accès trustinWallet, serveur) ; maquette Nuxt rangée dans maquette/

- crates/ld-engine : formule inertielle (parité avec la maquette, garde C),
  coquille / changement de fond, assistant d'édition à règles, composition
  d'un document sous vote permanent (adoptions, aperçus, rivales).
- crates/trustin-access : qui voit, qui ouvre, qui gère les accès.
- crates/ld-server : API axum + SQLite, connexion Ğ1 (client OAuth2 de
  connect.monnaie-libre.fr), invitations, entrée en vigueur automatique,
  signalements de contradiction, traductions éditoriales, publication git,
  taille de la toile lue sur la chaîne.
- seeds/acte-engagement-certification.json : 33 articles, fr + en + es ;
  en vigueur : préambule, E1, E2 (seed a minima).
- maquette/ : frontend, backend et docker v2 déplacés tels quels.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

maquette/backend/app/models/mandate.py

@@ -0,0 +1,68 @@
+import uuid
+from datetime import datetime
+
+from sqlalchemy import String, Integer, Text, DateTime, ForeignKey, Uuid, func
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from app.database import Base
+
+
+class Mandate(Base):
+    __tablename__ = "mandates"
+
+    id: Mapped[uuid.UUID] = mapped_column(Uuid, primary_key=True, default=uuid.uuid4)
+    title: Mapped[str] = mapped_column(String(256), nullable=False)
+    origin_id: Mapped[uuid.UUID | None] = mapped_column(ForeignKey("duniter_identities.id"), nullable=True, index=True)
+    description: Mapped[str | None] = mapped_column(Text)
+    mandate_type: Mapped[str] = mapped_column(String(64), nullable=False)
+    status: Mapped[str] = mapped_column(String(32), default="draft")
+    organization_id: Mapped[uuid.UUID | None] = mapped_column(ForeignKey("organizations.id"), nullable=True, index=True)
+    mandatee_id: Mapped[uuid.UUID | None] = mapped_column(ForeignKey("duniter_identities.id"))
+    decision_id: Mapped[uuid.UUID | None] = mapped_column(ForeignKey("decisions.id"))
+    starts_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
+    ends_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
+    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())
+    updated_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now())
+
+    steps: Mapped[list["MandateStep"]] = relationship(
+        back_populates="mandate", cascade="all, delete-orphan", order_by="MandateStep.step_order"
+    )
+    origin_identity: Mapped["DuniterIdentity | None"] = relationship(  # type: ignore[name-defined]
+        "DuniterIdentity", foreign_keys=[origin_id]
+    )
+    mandatee: Mapped["DuniterIdentity | None"] = relationship(  # type: ignore[name-defined]
+        "DuniterIdentity", foreign_keys=[mandatee_id]
+    )
+
+    @property
+    def origin_display_name(self) -> str | None:
+        if self.origin_identity is not None:
+            return self.origin_identity.display_name or self.origin_identity.address
+        return None
+
+    @property
+    def mandatee_display_name(self) -> str | None:
+        if self.mandatee is not None:
+            return self.mandatee.display_name or self.mandatee.address
+        return None
+
+
+class MandateStep(Base):
+    __tablename__ = "mandate_steps"
+
+    id: Mapped[uuid.UUID] = mapped_column(Uuid, primary_key=True, default=uuid.uuid4)
+    mandate_id: Mapped[uuid.UUID] = mapped_column(ForeignKey("mandates.id"), nullable=False)
+    step_order: Mapped[int] = mapped_column(Integer, nullable=False)
+    step_type: Mapped[str] = mapped_column(String(32), nullable=False)
+    title: Mapped[str | None] = mapped_column(String(256))
+    description: Mapped[str | None] = mapped_column(Text)
+    status: Mapped[str] = mapped_column(String(32), default="pending")
+    vote_session_id: Mapped[uuid.UUID | None] = mapped_column(ForeignKey("vote_sessions.id"))
+    outcome: Mapped[str | None] = mapped_column(Text)
+    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())
+
+    mandate: Mapped["Mandate"] = relationship(back_populates="steps")
+
+
+# Avoid circular import — DuniterIdentity imported at runtime by SQLAlchemy relationship resolution
+from app.models.user import DuniterIdentity  # noqa: E402, F401