feat(rah-light): remove unused npm packages

- Remove @ai-sdk/anthropic (was used by deleted Claude chat agent)
- Remove @ai-sdk/react (was used by deleted chat UI hooks)
- All remaining packages are actively used

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

package-lock.json

@@ -9,9 +9,7 @@
       "version": "0.1.0",
       "license": "MIT",
       "dependencies": {
-        "@ai-sdk/anthropic": "^3.0.9",
         "@ai-sdk/openai": "^3.0.7",
-        "@ai-sdk/react": "^3.0.29",
         "@langchain/core": "^1.0.1",
         "@langchain/textsplitters": "^1.0.1",
         "@xyflow/react": "^12.10.0",
@@ -48,22 +46,6 @@
         "vitest": "^3.2.4"
       }
     },
-    "node_modules/@ai-sdk/anthropic": {
-      "version": "3.0.9",
-      "resolved": "https://registry.npmjs.org/@ai-sdk/anthropic/-/anthropic-3.0.9.tgz",
-      "integrity": "sha512-QBD4qDnwIHd+N5PpjxXOaWJig1aRB43J0PM5ZUe6Yyl9Qq2bUmraQjvNznkuFKy+hMFDgj0AvgGogTiO5TC+qA==",
-      "license": "Apache-2.0",
-      "dependencies": {
-        "@ai-sdk/provider": "3.0.2",
-        "@ai-sdk/provider-utils": "4.0.4"
-      },
-      "engines": {
-        "node": ">=18"
-      },
-      "peerDependencies": {
-        "zod": "^3.25.76 || ^4.1.8"
-      }
-    },
     "node_modules/@ai-sdk/gateway": {
       "version": "3.0.11",
       "resolved": "https://registry.npmjs.org/@ai-sdk/gateway/-/gateway-3.0.11.tgz",
@@ -126,24 +108,6 @@
         "zod": "^3.25.76 || ^4.1.8"
       }
     },
-    "node_modules/@ai-sdk/react": {
-      "version": "3.0.29",
-      "resolved": "https://registry.npmjs.org/@ai-sdk/react/-/react-3.0.29.tgz",
-      "integrity": "sha512-e17Id+43xCjHApsjane3dVl5xuUdP9lXgZMtNcgMlg3NHhv6UYpRGuH4+d/5W8+VHhhpNfTZEf7J5DkKehGgJQ==",
-      "license": "Apache-2.0",
-      "dependencies": {
-        "@ai-sdk/provider-utils": "4.0.4",
-        "ai": "6.0.27",
-        "swr": "^2.2.5",
-        "throttleit": "2.1.0"
-      },
-      "engines": {
-        "node": ">=18"
-      },
-      "peerDependencies": {
-        "react": "^18 || ~19.0.1 || ~19.1.2 || ^19.2.1"
-      }
-    },
     "node_modules/@alloc/quick-lru": {
       "version": "5.2.0",
       "resolved": "https://registry.npmjs.org/@alloc/quick-lru/-/quick-lru-5.2.0.tgz",
@@ -9778,19 +9742,6 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
-    "node_modules/swr": {
-      "version": "2.3.8",
-      "resolved": "https://registry.npmjs.org/swr/-/swr-2.3.8.tgz",
-      "integrity": "sha512-gaCPRVoMq8WGDcWj9p4YWzCMPHzE0WNl6W8ADIx9c3JBEIdMkJGMzW+uzXvxHMltwcYACr9jP+32H8/hgwMR7w==",
-      "license": "MIT",
-      "dependencies": {
-        "dequal": "^2.0.3",
-        "use-sync-external-store": "^1.6.0"
-      },
-      "peerDependencies": {
-        "react": "^16.11.0 || ^17.0.0 || ^18.0.0 || ^19.0.0"
-      }
-    },
     "node_modules/tailwindcss": {
       "version": "3.4.19",
       "resolved": "https://registry.npmjs.org/tailwindcss/-/tailwindcss-3.4.19.tgz",
@@ -9917,18 +9868,6 @@
         "node": ">=0.8"
       }
     },
-    "node_modules/throttleit": {
-      "version": "2.1.0",
-      "resolved": "https://registry.npmjs.org/throttleit/-/throttleit-2.1.0.tgz",
-      "integrity": "sha512-nt6AMGKW1p/70DF/hGBdJB57B8Tspmbp5gfJ8ilhLnt7kkr2ye7hzD6NVG8GGErk2HWF34igrL2CXmNIkzKqKw==",
-      "license": "MIT",
-      "engines": {
-        "node": ">=18"
-      },
-      "funding": {
-        "url": "https://github.com/sponsors/sindresorhus"
-      }
-    },
     "node_modules/tinybench": {
       "version": "2.9.0",
       "resolved": "https://registry.npmjs.org/tinybench/-/tinybench-2.9.0.tgz",