* fix(mcp): resolve \$ref params and merge path-level params in OpenAPI tool registration
Real-world OpenAPI specs (e.g. GitHub's 11.8 MB official spec) use two
patterns that crashed tool registration:
1. \$ref parameters: params defined as {"$ref": "#/components/parameters/foo"}
instead of inline objects. Accessing param["name"] on a $ref raises KeyError.
Fix: resolve each param against components/parameters before processing.
2. Path-level parameters: params defined on the path object apply to all
HTTP methods on that path, but the operation object doesn't include them.
GitHub's spec uses this for owner/repo/etc. path params.
Fix: merge path-level params with operation-level params (op-level wins
when the same name+in combination appears in both).
With this fix the full GitHub REST API spec loads successfully:
720 paths → 1079 tools, all with correct parameter schemas.
* fix(mcp): resolve \$ref params in OpenAPI preview endpoint (test/tools/list)
The _preview_openapi_tools function (called by the UI add-server form to show
connection status and available tools) had the same bug as _register_openapi_tools:
it accessed param["name"] directly without resolving \$ref parameters or merging
path-level parameters from the path item.
This caused "Failed to load OpenAPI spec: 'name'" for any spec that uses
component-level parameter references (e.g. GitHub's official REST API spec).
Apply the same fix: resolve \$ref against components/parameters and merge
path-level params (with operation-level taking priority) before building schemas.
* refactor(openapi-mcp): extract resolve_operation_params, add tests
- Hoist _resolve_ref and _resolve_param_list to module level in
openapi_to_mcp_generator.py (were being redefined on every loop iteration)
- _resolve_ref now returns None for unresolvable $refs instead of
the stub dict, preventing (None, None) from poisoning deduplication
- Add resolve_operation_params() as a shared helper that handles both
$ref resolution and path-level param merging
- Replace duplicated inline logic in mcp_server_manager.py and
rest_endpoints.py with calls to resolve_operation_params()
- Add TestResolveRef, TestResolveParamList, TestResolveOperationParams
test classes covering $ref resolution, path-level merging, collision
semantics, unresolvable ref filtering, and a GitHub-style spec fixture
bb52b0b6b0