feat: migrate ComfyUI nodes from presigned URLs to Brain API storage endpoints
## Core Architecture Changes
- Add new BrainApiClient for direct Brain API communication
- Replace presigned URL workflow with storage_id/filename pattern
- Update MediaStreamInput to use storage_id + filename instead of presigned_download_url
- Update MediaStreamOutput to use storage_id + filename instead of presigned_upload_url
## Brain API Client Implementation
- Add comprehensive BrainApiClient with authentication and error handling
- Implement get_presigned_upload_url() and get_presigned_download_url() methods
- Add proper Bearer token authentication for Brain API requests
- Include environment variable configuration for Brain API endpoint and credentials
## Media Stream Node Updates
- Refactor MediaStreamInput to request presigned URLs from Brain API using storage_id
- Update MediaStreamOutput to upload directly to MinIO using Brain API presigned URLs
- Simplify node interface by removing presigned URL inputs from workflow templates
- Update JavaScript frontend to hide system inputs and manage node UI state
## Infrastructure Improvements
- Add .idea/ to .gitignore for IDE file exclusions
- Update user_input.py to use new storage_id pattern
- Streamline web interface JavaScript for cleaner node management
This commit aligns the nilor-nodes with the project's new unified, name-based I/O system, as specified in the workflow override fix plan. This change establishes a stable, human-readable API contract for all workflows, replacing the previous fragile node-ID-based system.
Key Changes:
- **`MediaStreamInput` & `NilorUserInput`**: Added a static, non-overridable `input_name` string widget. Workflow authors now assign a logical name to each input, which is used by the Brain API to inject data.
- **`MediaStreamOutput`**: Added a static `output_name` widget. This provides a stable key for the Brain API to identify and retrieve specific outputs.
- **`MediaStreamOutput` (Logic)**: Corrected the completion logic to properly parse the full dictionary of named outputs it receives from the Brain API, ensuring it sends the correct, complete payload upon job completion.
These changes are a critical part of the larger refactor to improve the security, scalability, and maintainability of the ComfyUI integration.
Sly