Python: Add Function Approval UI to DevUI (#1401)

* ensure function aproval is parsed correctly

* udpate ui, add deployment guide button, other debug panel fixes

* feat(devui): Implement lazy loading architecture with enhanced security and state management

Major architectural improvements to DevUI for better performance, security, and developer experience:

Performance & Architecture:
- Implement lazy loading for entity discovery - entities loaded on-demand instead of at startup
- Add hot reload capability for development workflow via new reload endpoint
- Reduce startup time and memory footprint by deferring module imports

Security Enhancements:
- Remove remote entity loading capabilities (POST /v1/entities/add, DELETE endpoints)
- DevUI now strictly local development tool - no remote code execution
- Add explicit security documentation and best practices in README

Frontend Improvements:
- Migrate to Zustand for centralized state management (replacing prop drilling)
- Add lightweight zero-dependency markdown renderer with code block copy support
- Improve gallery UX with setup instructions modal instead of direct URL loading
- Enhanced message UI with copy functionality and better token usage display

Testing & Quality:
- Expand test coverage for lazy loading, type detection, and cache invalidation
- Add comprehensive tests for new behaviors (+231 lines of test code)
- Improve type safety and documentation throughout

Breaking Changes:
- Remote entity loading via URLs is no longer supported
- Entities must be loaded from local filesystem only

* update ui issues, uupdate test descripion

python/packages/devui/agent_framework_devui/models/_discovery_models.py

@@ -31,8 +31,7 @@ class EntityInfo(BaseModel):
     metadata: dict[str, Any] = Field(default_factory=dict)
 
     # Source information
-    source: str = "directory"  # "directory", "in_memory", "remote_gallery"
-    original_url: str | None = None
+    source: str = "directory"  # "directory" or "in_memory"
 
     # Environment variable requirements
     required_env_vars: list[EnvVarRequirement] | None = None

python/packages/devui/agent_framework_devui/models/_openai_custom.py

@@ -38,11 +38,16 @@ class ResponseTraceEventComplete(BaseModel):
 
 
 class ResponseFunctionResultComplete(BaseModel):
-    """Custom DevUI event for function execution results.
+    """DevUI extension: Stream function execution results.
 
-    This is a DevUI extension - OpenAI doesn't stream function execution results
-    because in their model, the application executes functions, not the API.
-    Agent Framework executes functions, so we emit this event for debugging visibility.
+    This is a DevUI extension because:
+    - OpenAI Responses API doesn't stream function results (clients execute functions)
+    - Agent Framework executes functions server-side, so we stream results for debugging visibility
+    - ResponseFunctionToolCallOutputItem exists in OpenAI SDK but isn't in ResponseOutputItem union
+      (it's for Conversations API input, not Responses API streaming output)
+
+    This event provides the same structure as OpenAI's function output items but wrapped
+    in a custom event type since standard events don't support streaming function results.
     """
 
     type: Literal["response.function_result.complete"] = "response.function_result.complete"