Add GenAI Backend Streaming and Chat (#22152)

* Add basic chat page with entry

* Add chat history

* processing

* Add markdown

* Improvements

* Adjust timing format

* Reduce fields in response

* More time parsing improvements

* Show tool calls separately from message

* Add title

* Improve UI handling

* Support streaming

* Full streaming support

* Fix tool calling

* Add copy button

* Improvements to UI

* Improve default behavior

* Implement message editing

* Add sub label to event tool filtering

* Cleanup

* Cleanup UI and prompt

* Cleanup UI bubbles

* Fix loading

* Add support for markdown tables

* Add thumbnail images to object results

* Add a starting state for chat

* Clenaup

frigate/api/defs/response/chat_response.py

@@ -5,8 +5,8 @@ from typing import Any, Optional
 from pydantic import BaseModel, Field
 
 
-class ToolCall(BaseModel):
-    """A tool call from the LLM."""
+class ToolCallInvocation(BaseModel):
+    """A tool call requested by the LLM (before execution)."""
 
     id: str = Field(description="Unique identifier for this tool call")
     name: str = Field(description="Tool name to call")
@@ -20,11 +20,24 @@ class ChatMessageResponse(BaseModel):
     content: Optional[str] = Field(
         default=None, description="Message content (None if tool calls present)"
     )
-    tool_calls: Optional[list[ToolCall]] = Field(
+    tool_calls: Optional[list[ToolCallInvocation]] = Field(
         default=None, description="Tool calls if LLM wants to call tools"
     )
 
 
+class ToolCall(BaseModel):
+    """A tool that was executed during the completion, with its response."""
+
+    name: str = Field(description="Tool name that was called")
+    arguments: dict[str, Any] = Field(
+        default_factory=dict, description="Arguments passed to the tool"
+    )
+    response: str = Field(
+        default="",
+        description="The response or result returned from the tool execution",
+    )
+
+
 class ChatCompletionResponse(BaseModel):
     """Response from chat completion."""
 
@@ -35,3 +48,7 @@ class ChatCompletionResponse(BaseModel):
     tool_iterations: int = Field(
         default=0, description="Number of tool call iterations performed"
     )
+    tool_calls: list[ToolCall] = Field(
+        default_factory=list,
+        description="List of tool calls that were executed during this completion",
+    )