Add ComfyUI reverse proxy with session authentication

- New /comfy/* routes that proxy to local ComfyUI instance
- Dark mode login page with session-based auth (HMAC-signed cookies)
- HTTP proxy for all ComfyUI requests
- WebSocket proxy for real-time features
- Environment variables: COMFYUI_URL, COMFYUI_USER, COMFYUI_PASS, SESSION_SECRET
- Added websockets and python-multipart to server dependencies

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

pyproject.toml

@@ -15,7 +15,7 @@ dependencies = [
 ]
 
 [project.optional-dependencies]
-server = ["fastapi>=0.115", "uvicorn>=0.30", "scalar-fastapi>=1.6"]
+server = ["fastapi>=0.115", "uvicorn>=0.30", "scalar-fastapi>=1.6", "websockets>=12.0", "python-multipart>=0.0.9"]
 
 [project.scripts]
 tsr = "tensors:main"
@@ -39,6 +39,8 @@ dev = [
     "fastapi>=0.115",
     "uvicorn>=0.30",
     "scalar-fastapi>=1.6",
+    "websockets>=12.0",
+    "python-multipart>=0.0.9",
 ]
 
 [tool.ruff]
@@ -104,6 +106,10 @@ ignore_missing_imports = true
 module = ["huggingface_hub.*"]
 ignore_missing_imports = true
 
+[[tool.mypy.overrides]]
+module = ["websockets.*"]
+ignore_missing_imports = true
+
 [tool.pytest.ini_options]
 testpaths = ["tests"]
 addopts = "-v --cov=tensors --cov-report=term-missing"