🔀 feat: update OpenRouter with new Reasoning config (#11993)

* fix: Update OpenRouter reasoning handling in LLM configuration

- Modified the OpenRouter configuration to use a unified `reasoning` object instead of separate `reasoning_effort` and `include_reasoning` properties.
- Updated tests to ensure that `reasoning_summary` is excluded from the reasoning object and that the configuration behaves correctly based on the presence of reasoning parameters.
- Enhanced test coverage for OpenRouter-specific configurations, ensuring proper handling of various reasoning effort levels.

* refactor: Improve OpenRouter reasoning handling in LLM configuration

- Updated the handling of the `reasoning` object in the OpenRouter configuration to clarify the relationship between `reasoning_effort` and `include_reasoning`.
- Enhanced comments to explain the behavior of the `reasoning` object and its compatibility with legacy parameters.
- Ensured that the configuration correctly falls back to legacy behavior when no explicit reasoning effort is provided.

* test: Enhance OpenRouter LLM configuration tests

- Added a new test to verify the combination of web search plugins and reasoning object for OpenRouter configurations.
- Updated existing tests to ensure proper handling of reasoning effort levels and fallback behavior when reasoning_effort is unset.
- Improved test coverage for OpenRouter-specific configurations, ensuring accurate validation of reasoning parameters.

* chore: Update @librechat/agents dependency to version 3.1.53

- Bumped the version of @librechat/agents in package-lock.json and related package.json files to ensure compatibility with the latest features and fixes.
- Updated integrity hashes to reflect the new version.

package-lock.json

@@ -59,7 +59,7 @@
         "@google/genai": "^1.19.0",
         "@keyv/redis": "^4.3.3",
         "@langchain/core": "^0.3.80",
-        "@librechat/agents": "^3.1.52",
+        "@librechat/agents": "^3.1.53",
         "@librechat/api": "*",
         "@librechat/data-schemas": "*",
         "@microsoft/microsoft-graph-client": "^3.0.7",
@@ -11836,9 +11836,9 @@
       }
     },
     "node_modules/@librechat/agents": {
-      "version": "3.1.52",
-      "resolved": "https://registry.npmjs.org/@librechat/agents/-/agents-3.1.52.tgz",
-      "integrity": "sha512-Bg35zp+vEDZ0AEJQPZ+ukWb/UqBrsLcr3YQWRQpuvpftEgfQz0fHM5Wrxn6l5P7PvaD1ViolxoG44nggjCt7Hw==",
+      "version": "3.1.53",
+      "resolved": "https://registry.npmjs.org/@librechat/agents/-/agents-3.1.53.tgz",
+      "integrity": "sha512-jK9JHIhQYgr+Ha2FhknEYQmS6Ft3/TGdYIlL6L6EtIq20SIA59r1DvQx/x9sd3wHoHkk6AZumMgqAUTTCaWBIA==",
       "license": "MIT",
       "dependencies": {
         "@anthropic-ai/sdk": "^0.73.0",
@@ -43797,7 +43797,7 @@
         "@google/genai": "^1.19.0",
         "@keyv/redis": "^4.3.3",
         "@langchain/core": "^0.3.80",
-        "@librechat/agents": "^3.1.52",
+        "@librechat/agents": "^3.1.53",
         "@librechat/data-schemas": "*",
         "@modelcontextprotocol/sdk": "^1.27.1",
         "@smithy/node-http-handler": "^4.4.5",