fix: ruff lint + format fixes in tests, ESLint fixes in frontend

backend/app/schemas/copilot.py

@@ -10,14 +10,18 @@ class ChatRequest(BaseModel):
     """Request body for POST /copilot/chat."""
 
     message: str = Field(..., min_length=1, description="User message to the Copilot")
-    session_id: Optional[str] = Field(None, description="Existing session UUID to continue")
+    session_id: Optional[str] = Field(
+        None, description="Existing session UUID to continue"
+    )
 
 
 class ActionItem(BaseModel):
     """A single action proposed by the Copilot."""
 
     type: str = Field(..., description="Action type, e.g. search_vehicles")
-    params: dict[str, Any] = Field(default_factory=dict, description="Action parameters")
+    params: dict[str, Any] = Field(
+        default_factory=dict, description="Action parameters"
+    )
 
 
 class ChatResponse(BaseModel):
@@ -26,7 +30,9 @@ class ChatResponse(BaseModel):
     model_config = ConfigDict(from_attributes=True)
 
     response: str = Field(..., description="Assistant text response")
-    actions: list[ActionItem] = Field(default_factory=list, description="Proposed actions")
+    actions: list[ActionItem] = Field(
+        default_factory=list, description="Proposed actions"
+    )
     session_id: str = Field(..., description="Session UUID")
     message_id: str = Field(..., description="Assistant message UUID")
 
@@ -35,7 +41,9 @@ class ActionRequest(BaseModel):
     """Request body for POST /copilot/action — user confirms an action."""
 
     action: str = Field(..., min_length=1, description="Action type to execute")
-    params: dict[str, Any] = Field(default_factory=dict, description="Action parameters")
+    params: dict[str, Any] = Field(
+        default_factory=dict, description="Action parameters"
+    )
     session_id: Optional[str] = Field(None, description="Session context")
 
 
@@ -89,6 +97,8 @@ class VoiceResponse(BaseModel):
 
     transcription: str = Field(..., description="Transcribed text")
     response: str = Field(..., description="Assistant text response")
-    actions: list[ActionItem] = Field(default_factory=list, description="Proposed actions")
+    actions: list[ActionItem] = Field(
+        default_factory=list, description="Proposed actions"
+    )
     session_id: str = Field(..., description="Session UUID")
     message_id: str = Field(..., description="Assistant message UUID")