Composants engagement: GenesisBlock, InertiaSlider, MiniVoteBoard, EngagementCard, DocumentTuto

Backend: genesis_json sur Document, section_tag/inertia_preset/is_permanent_vote sur DocumentItem
Frontend: 5 nouveaux composants pour vue detail document enrichie
- GenesisBlock: sources, outils, synthese forum, contributeurs (depliable)
- InertiaSlider: visualisation inertie 4 niveaux avec params formule G/M
- MiniVoteBoard: tableau vote compact (barre seuil, pour/contre, participation)
- EngagementCard: carte item enrichie integrant vote + inertie + actions
- DocumentTuto: modal pedagogique vote permanent/inertie/seuils
Seed et page [slug] enrichis pour exploiter les nouveaux champs

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

backend/app/schemas/document.py

@@ -42,6 +42,7 @@ class DocumentOut(BaseModel):
     description: str | None = None
     ipfs_cid: str | None = None
     chain_anchor: str | None = None
+    genesis_json: str | None = None
     created_at: datetime
     updated_at: datetime
     items_count: int = Field(default=0, description="Number of items in this document")
@@ -54,10 +55,13 @@ class DocumentItemCreate(BaseModel):
     """Payload for creating a document item (clause, rule, etc.)."""
 
     position: str = Field(..., max_length=16, description='Hierarchical position e.g. "1", "1.1", "3.2"')
-    item_type: str = Field(default="clause", max_length=32, description="clause, rule, verification, preamble, section")
+    item_type: str = Field(default="clause", max_length=32, description="clause, rule, verification, preamble, section, genesis")
     title: str | None = Field(default=None, max_length=256)
     current_text: str = Field(..., min_length=1)
     voting_protocol_id: UUID | None = None
+    section_tag: str | None = Field(default=None, max_length=64)
+    inertia_preset: str = Field(default="standard", max_length=16)
+    is_permanent_vote: bool = True
 
 
 class DocumentItemUpdate(BaseModel):
@@ -82,6 +86,9 @@ class DocumentItemOut(BaseModel):
     current_text: str
     voting_protocol_id: UUID | None = None
     sort_order: int
+    section_tag: str | None = None
+    inertia_preset: str = "standard"
+    is_permanent_vote: bool = True
     created_at: datetime
     updated_at: datetime
 
@@ -99,6 +106,9 @@ class DocumentItemFullOut(BaseModel):
     current_text: str
     voting_protocol_id: UUID | None = None
     sort_order: int
+    section_tag: str | None = None
+    inertia_preset: str = "standard"
+    is_permanent_vote: bool = True
     created_at: datetime
     updated_at: datetime
     versions: list[ItemVersionOut] = Field(default_factory=list)
@@ -118,6 +128,7 @@ class DocumentFullOut(BaseModel):
     description: str | None = None
     ipfs_cid: str | None = None
     chain_anchor: str | None = None
+    genesis_json: str | None = None
     created_at: datetime
     updated_at: datetime
     items: list[DocumentItemOut] = Field(default_factory=list)