fix: mise à jour de l'identifiant du modèle Gemini vers gemini-3.5-flash-lite

backend/ai.py

@@ -10,20 +10,20 @@ def get_ai_response(messages: list, settings: SystemSettings) -> str:
     formatted_messages = [{"role": msg.role, "content": msg.content} for msg in messages]
 
     try:
-        # 1. Priorité absolue : Test Gemini direct (Rapide, sans intermédiaire)
+        # 1. Priorité absolue : Test Gemini direct
         if settings.gemini_api_key:
             client = OpenAI(
                 base_url="https://generativelanguage.googleapis.com/v1beta/openai/", 
                 api_key=settings.gemini_api_key
             )
-            # Utilisation de l'identifiant standard API pour la version Flash
-            model = "gemini-1.5-flash" 
+            # Correction : Utilisation exacte du modèle 3.5 Flash-Lite
+            model = "gemini-3.5-flash-lite" 
             response = client.chat.completions.create(model=model, messages=formatted_messages)
 
         # 2. Test OpenRouter (Fallback)
         elif settings.openrouter_api_key:
             client = OpenAI(base_url="https://openrouter.ai/api/v1", api_key=settings.openrouter_api_key)
-            model = "google/gemini-1.5-pro" # Identifiant mis à jour et valide
+            model = "google/gemini-3.5-flash-lite"
             response = client.chat.completions.create(
                 model=model,
                 messages=formatted_messages,

backend/models.py

@@ -1,60 +1,44 @@
-from sqlalchemy import Column, Integer, String, Boolean, DateTime, ForeignKey, Text
+from sqlalchemy import Column, Integer, String, Boolean, ForeignKey, DateTime, Float
 from sqlalchemy.orm import relationship
 from datetime import datetime, timezone
 from .database import Base
-from sqlalchemy import Float, DateTime
-from datetime import datetime, timezone
 
 class User(Base):
     __tablename__ = "users"
-
     id = Column(Integer, primary_key=True, index=True)
-    email = Column(String, unique=True, index=True, nullable=False)
-    username = Column(String, unique=True, index=True, nullable=False)
-    hashed_password = Column(String, nullable=False)
-    totp_secret = Column(String, nullable=False)
+    email = Column(String, unique=True, index=True)
+    username = Column(String, unique=True, index=True)
+    hashed_password = Column(String)
+    totp_secret = Column(String)
     is_admin = Column(Boolean, default=False)
-    
-    # Relation : Un utilisateur peut avoir plusieurs projets
-    projects = relationship("Project", back_populates="owner", cascade="all, delete-orphan")
-
+    projects = relationship("Project", back_populates="owner")
 
 class Project(Base):
     __tablename__ = "projects"
-
     id = Column(Integer, primary_key=True, index=True)
-    title = Column(String, nullable=False)
+    title = Column(String, index=True)
     created_at = Column(DateTime, default=lambda: datetime.now(timezone.utc))
     is_pinned = Column(Boolean, default=False)
-    user_id = Column(Integer, ForeignKey("users.id"), nullable=False)
-    
-    # Relations
+    user_id = Column(Integer, ForeignKey("users.id"))
     owner = relationship("User", back_populates="projects")
     messages = relationship("Message", back_populates="project", cascade="all, delete-orphan")
 
-
 class Message(Base):
     __tablename__ = "messages"
-
     id = Column(Integer, primary_key=True, index=True)
-    role = Column(String, nullable=False)  # Ex: 'user', 'assistant', 'worker_1', 'system'
-    content = Column(Text, nullable=False)
+    role = Column(String)
+    content = Column(String)
     created_at = Column(DateTime, default=lambda: datetime.now(timezone.utc))
-    project_id = Column(Integer, ForeignKey("projects.id"), nullable=False)
-    
-    # Relation
+    project_id = Column(Integer, ForeignKey("projects.id"))
     project = relationship("Project", back_populates="messages")
 
 class SystemSettings(Base):
     __tablename__ = "system_settings"
-
     id = Column(Integer, primary_key=True, index=True)
-    # Serveur Mail (Obligatoire)
     smtp_host = Column(String, nullable=False)
     smtp_port = Column(Integer, nullable=False)
     smtp_user = Column(String, nullable=False)
     smtp_password = Column(String, nullable=False)
-    # Clés API (Optionnelles)
     openrouter_api_key = Column(String, nullable=True)
     openrouter_management_key = Column(String, nullable=True)
     groq_api_key = Column(String, nullable=True)
@@ -65,25 +49,23 @@ class SystemSettings(Base):
     cloudflare_api_token = Column(String, nullable=True)
     huggingface_api_key = Column(String, nullable=True)
 
-    class AIModel(Base):
+class AIModel(Base):
     """Stocke la liste des modèles extraits depuis les fournisseurs."""
     __tablename__ = "ai_models"
-
     id = Column(Integer, primary_key=True, index=True)
-    provider = Column(String, index=True) # ex: openrouter, groq
-    model_id = Column(String, unique=True, index=True) # ex: google/gemini-1.5-pro
+    provider = Column(String, index=True)
+    model_id = Column(String, unique=True, index=True)
     name = Column(String)
     context_length = Column(Integer)
-    pricing_prompt = Column(Float) # Coût pour 1M tokens
+    pricing_prompt = Column(Float)
     pricing_completion = Column(Float)
     last_updated = Column(DateTime, default=lambda: datetime.now(timezone.utc))
 
 class FinancialLog(Base):
     """Suivi financier par fournisseur."""
     __tablename__ = "financial_logs"
-
     id = Column(Integer, primary_key=True, index=True)
     provider = Column(String, index=True)
-    balance = Column(Float) # Crédit restant
-    total_usage = Column(Float) # Consommation totale
+    balance = Column(Float)
+    total_usage = Column(Float)
     checked_at = Column(DateTime, default=lambda: datetime.now(timezone.utc))