fix: use correct FastMCP API method http_app()

- Changed mcp_server.streamable_http_app() -> mcp_server.http_app()
- Reformatted test_tools.py to fix line ending issues
- All tests passing (49/49 including api/test_main.py)

This fixes CI failures in lint and test workflows.

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

Author: MarkusNeusinger

api/main.py

@@ -126,7 +126,7 @@ async def add_cache_headers(request: Request, call_next):
 
 
 # Mount MCP server for AI assistant integration
-app.mount("/mcp", mcp_server.streamable_http_app())
+app.mount("/mcp", mcp_server.http_app())
 
 # Register routers
 app.include_router(health_router)

tests/unit/pyplots_mcp/test_tools.py

@@ -73,12 +73,7 @@ def mock_spec():
     spec.applications = ["Data analysis", "Correlation studies"]
     spec.data = ["x (numeric)", "y (numeric)"]
     spec.notes = ["Use for continuous data"]
-    spec.tags = {
-        "plot_type": ["scatter"],
-        "data_type": ["numeric"],
-        "domain": ["statistics"],
-        "features": ["basic"],
-    }
+    spec.tags = {"plot_type": ["scatter"], "data_type": ["numeric"], "domain": ["statistics"], "features": ["basic"]}
     spec.issue = 42
     spec.suggested = "contributor"
     spec.created = None
@@ -106,10 +101,7 @@ async def test_list_specs(mock_db_context, mock_spec):
 @pytest.mark.asyncio
 async def test_list_specs_pagination(mock_db_context):
     """Test list_specs pagination."""
-    specs = [
-        MagicMock(id=f"spec-{i}", title=f"Spec {i}", description="", tags={}, impls=[])
-        for i in range(5)
-    ]
+    specs = [MagicMock(id=f"spec-{i}", title=f"Spec {i}", description="", tags={}, impls=[]) for i in range(5)]
 
     mock_repo = MagicMock()
     mock_repo.get_all = AsyncMock(return_value=specs)