feat: traçabilité source systématique + viewer interactif

Ajoute source_page/source_excerpt à tous les types (biologie, imagerie,
traitements, actes CCAM, antécédents, complications). Convertit antecedents
et complications en types structurés (Antecedent/Complication) avec
validators backward-compat pour les vieux JSON. Étend _apply_source_tracking
à tous les éléments du dossier. Ajoute un endpoint /api/source-text/ et un
modal interactif dans le viewer avec surlignage du texte source.

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

src/config.py

@@ -7,7 +7,7 @@ from pathlib import Path
 from typing import Optional
 
 from dotenv import load_dotenv
-from pydantic import BaseModel, Field
+from pydantic import BaseModel, Field, field_validator
 
 load_dotenv()
 
@@ -125,24 +125,44 @@ class ActeCCAM(BaseModel):
     date: Optional[str] = None
     validite: Optional[str] = None  # "valide" | "obsolete" | "non_verifie"
     alertes: list[str] = Field(default_factory=list)
+    source_page: Optional[int] = None
+    source_excerpt: Optional[str] = None
 
 
 class Traitement(BaseModel):
     medicament: str
     posologie: Optional[str] = None
     code_atc: Optional[str] = None
+    source_page: Optional[int] = None
+    source_excerpt: Optional[str] = None
 
 
 class BiologieCle(BaseModel):
     test: str
     valeur: Optional[str] = None
     anomalie: Optional[bool] = None
+    source_page: Optional[int] = None
+    source_excerpt: Optional[str] = None
 
 
 class Imagerie(BaseModel):
     type: str
     conclusion: Optional[str] = None
     score: Optional[str] = None
+    source_page: Optional[int] = None
+    source_excerpt: Optional[str] = None
+
+
+class Antecedent(BaseModel):
+    texte: str
+    source_page: Optional[int] = None
+    source_excerpt: Optional[str] = None
+
+
+class Complication(BaseModel):
+    texte: str
+    source_page: Optional[int] = None
+    source_excerpt: Optional[str] = None
 
 
 class DossierMedical(BaseModel):
@@ -152,17 +172,45 @@ class DossierMedical(BaseModel):
     diagnostic_principal: Optional[Diagnostic] = None
     diagnostics_associes: list[Diagnostic] = Field(default_factory=list)
     actes_ccam: list[ActeCCAM] = Field(default_factory=list)
-    antecedents: list[str] = Field(default_factory=list)
+    antecedents: list[Antecedent] = Field(default_factory=list)
     traitements_sortie: list[Traitement] = Field(default_factory=list)
     biologie_cle: list[BiologieCle] = Field(default_factory=list)
     imagerie: list[Imagerie] = Field(default_factory=list)
-    complications: list[str] = Field(default_factory=list)
+    complications: list[Complication] = Field(default_factory=list)
     alertes_codage: list[str] = Field(default_factory=list)
     source_files: list[str] = Field(default_factory=list)
     ghm_estimation: Optional[GHMEstimation] = None
     controles_cpam: list[ControleCPAM] = Field(default_factory=list)
     processing_time_s: float | None = None
 
+    @field_validator("antecedents", mode="before")
+    @classmethod
+    def _coerce_antecedents(cls, v):
+        """Backward compat : convertit les anciennes list[str] en list[Antecedent]."""
+        if not isinstance(v, list):
+            return v
+        result = []
+        for item in v:
+            if isinstance(item, str):
+                result.append({"texte": item})
+            else:
+                result.append(item)
+        return result
+
+    @field_validator("complications", mode="before")
+    @classmethod
+    def _coerce_complications(cls, v):
+        """Backward compat : convertit les anciennes list[str] en list[Complication]."""
+        if not isinstance(v, list):
+            return v
+        result = []
+        for item in v:
+            if isinstance(item, str):
+                result.append({"texte": item})
+            else:
+                result.append(item)
+        return result
+
 
 # --- Rapport d'anonymisation ---