Mandats : origin→FK identité + nomination auto + boutons + tests intégration

- origin TEXT → origin_id UUID FK duniter_identities (migration e3f4a5b6c7d8)
- GET /auth/identities?q= : recherche d'identités par nom/adresse
- MandateCreate.nomination_mode : auto (auto-assign auteur), collective, postpone
- Wizard new.vue : champ origine = picker identité, checkbox "Démarrer maintenant"
- [id].vue : modal "Assigner" = search-picker (résout UUID vs adresse SS58), affiche
  origin_display_name + mandatee_display_name, inputs natifs (<input>/<textarea>)
- Erreurs API visibles dans l'UI (plus de catch silencieux)
- test_mandate_flows.py : 17 tests intégration SQLite réels (origin, nomination,
  assign, lifecycle, revocation, interactions croisées) — 241 tests total OK

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/app/schemas/mandate.py

@@ -10,21 +10,13 @@ from pydantic import BaseModel, ConfigDict, Field
 
 
 class MandateStepCreate(BaseModel):
-    """Payload for creating a step within a mandate process."""
-
     step_order: int = Field(..., ge=0)
-    step_type: str = Field(
-        ...,
-        max_length=32,
-        description="formulation, candidacy, vote, assignment, reporting, completion, revocation",
-    )
+    step_type: str = Field(..., max_length=32)
     title: str | None = Field(default=None, max_length=256)
     description: str | None = None
 
 
 class MandateStepOut(BaseModel):
-    """Full mandate step representation."""
-
     model_config = ConfigDict(from_attributes=True)
 
     id: UUID
@@ -43,44 +35,45 @@ class MandateStepOut(BaseModel):
 
 
 class MandateCreate(BaseModel):
-    """Payload for creating a new mandate."""
-
     title: str = Field(..., min_length=1, max_length=256)
-    origin: str | None = None
+    origin_id: UUID | None = None
     description: str | None = None
-    mandate_type: str = Field(..., max_length=64, description="techcomm, smith, custom")
+    mandate_type: str = Field(..., max_length=64)
+    nomination_mode: str = Field(
+        default="postpone",
+        description="auto (auto-assign author), collective, postpone",
+    )
     decision_id: UUID | None = None
     starts_at: datetime | None = None
     ends_at: datetime | None = None
 
 
 class MandateUpdate(BaseModel):
-    """Partial update for a mandate."""
-
     title: str | None = Field(default=None, max_length=256)
+    origin_id: UUID | None = None
     description: str | None = None
     mandate_type: str | None = Field(default=None, max_length=64)
     decision_id: UUID | None = None
+    starts_at: datetime | None = None
+    ends_at: datetime | None = None
 
 
 class MandateAssignRequest(BaseModel):
-    """Request body for assigning a mandatee to a mandate."""
-
-    mandatee_id: UUID = Field(..., description="ID de l'identite Duniter du mandataire")
+    mandatee_id: UUID = Field(..., description="UUID de l'identite Duniter du mandataire")
 
 
 class MandateOut(BaseModel):
-    """Full mandate representation returned by the API."""
-
     model_config = ConfigDict(from_attributes=True)
 
     id: UUID
     title: str
-    origin: str | None = None
+    origin_id: UUID | None = None
+    origin_display_name: str | None = None
     description: str | None = None
     mandate_type: str
     status: str
     mandatee_id: UUID | None = None
+    mandatee_display_name: str | None = None
     decision_id: UUID | None = None
     starts_at: datetime | None = None
     ends_at: datetime | None = None
@@ -89,22 +82,5 @@ class MandateOut(BaseModel):
     steps: list[MandateStepOut] = Field(default_factory=list)
 
 
-class MandateAdvanceOut(BaseModel):
-    """Output after advancing a mandate through its workflow."""
-
-    model_config = ConfigDict(from_attributes=True)
-
-    id: UUID
-    title: str
-    origin: str | None = None
-    description: str | None = None
-    mandate_type: str
-    status: str
-    mandatee_id: UUID | None = None
-    decision_id: UUID | None = None
-    starts_at: datetime | None = None
-    ends_at: datetime | None = None
-    created_at: datetime
-    updated_at: datetime
-    steps: list[MandateStepOut] = Field(default_factory=list)
+class MandateAdvanceOut(MandateOut):
     message: str = Field(..., description="Message decrivant l'avancement effectue")